Practical Applied Neuroscience

Practical Applied Neuroscience Coaching psychology and neuroscience.

Our aim is to promote the development of coaching psychology and neuroscience as a professional activity and clarify the benefits of psychological approaches within coaching practice. We are committed to fostering excellence in coaching practice through research, events, publications, discussion and professional development

How aggression works, both in ourselves and in others. In understanding how it works, you can work with very specific to...
15/05/2022

How aggression works, both in ourselves and in others. In understanding how it works, you can work with very specific tools to control it in a better way.

2 Types of Aggression
Psychologists divide aggression into two main types. Both are damaging to those who experience them, whether as the target or the aggressor.

Impulsive Aggression: is characterized by strong emotions. Impulsive aggression, especially when it’s caused by anger, triggers the acute threat response system in the brain, involving the amygdala, hypothalamus, and periaqueductal gray. This form of aggression is not planned and often takes place in the heat of the moment. If another car cuts you off in traffic and you begin yelling and berating the other driver, you’re experiencing impulsive aggression.
Instrumental Aggression: is marked by behaviors that are intended to achieve a larger goal. Instrumental aggression is often carefully planned and usually exists as a means to an end. Hurting another person in a robbery is an example of this type of aggression. The aggressor’s goal is to obtain money, and harming another individual is the means to achieve that aim.
Aggressive behaviors can be:

Physical.
Verbal.
Relational, which is intended to harm another person’s relationships. This can include spreading rumors and telling lies about someone else.
Passive-aggressive, like ignoring someone during a social event or offering back-handed compliments.
Biology of Aggression
Fixed action patterns: patterns of behavior that can be evoked by a single stimulus.

Aggression is a process, not an event.

Hydraulic pressure: multiple variables can create the pressure that drives us toward aggressive behavior.

VMH (ventromedial hypothalamus) nucleus: very small area that generates aggression. Stimulation of this area, especially the estrogen receptor-containing neurons, evoke instantaneous aggressive behavior.

The VMH is connected with the PAG (periaqueductal gray), which is a brain region that plays a critical role in autonomic function, motivated behavior, and behavioral responses to threatening stimuli.

Biting as aggressive behavior is associated with a more primitive circuit.

Testosterone
Testosterone does not increase aggressiveness. It increases proactivity and the willingness to lean into the effort in competitive scenarios and work under challenges.

Testosterone can be converted into estrogen through a process called aromatization. The aromatase enzyme converts testosterone into estrogen.

What triggers aggression is testosterone which is aromatized into estrogen and binding to the estrogen receptor-containing neurons in the VMH.

So it’s estrogen that makes people aggressive.

Melatonin, Dopamine, and Cortisol
On long days, melatonin levels are low. Dopamine increases. Stress hormones are reduced in levels.

On short days, if estrogen is increased, there is a heightened predisposition for aggression. Because in short days melatonin levels are high, stress hormones are higher, and dopamine levels are lower, we are more likely to behave aggressively.

When cortisol is high and when serotonin is reduced, there is a greater propensity for estrogen to trigger aggression.

Both external stimuli, as well as our internal state, are going to tilt the aggression response one way or the other. Reactivity is a function of the autonomic nervous system.

Tryptophan-rich diets (white turkey meat) contain the precursor to serotonin. Increased levels of tryptophan or drugs that increase serotonin tend to reduce aggressive behavior.

If cortisol is reduced, the tendency for aggressive behavior is reduced.

Tools
Omega-3 fatty acids (precursor of neurotransmitters that can modulate mood and emotional tone). They can improve mood and depression.
Supplementation of Omega-3s: 1g a day.

2. Sunlight: Getting sunlight early in the day and as much sunlight throughout the day is important.

3. Heat exposure: Sauna, heat and hot baths can reduce cortisol as well. (20-minute sauna, 80–100C)

4. Ashwagandha: decreases cortisol very potently. Chronic supplementation can have negative effects (disruption of hormone and neurotransmitter pathways). So the limit is two weeks of use.

Genetic Predisposition
The estrogen receptor sensitivity can result in increased levels of aggression.

Day length is a strong modulator of whether the aggressiveness turns out or not.

There’s an interplay between genetics and the environment.

Study: 30 minutes after application of an Androgel (testosterone that seeps into the bloodstream) there was a significant increase in amygdala activation, which puts us into a state of action and leans us into the effort.

Social Things that bias people into more aggressive behavior:

Alcohol and caffeine.
Alcohol and caffeine bias people into more aggressive behavior.

Caffeine increases aggressive impulsivity. It increases Autonomic arousal (alertness and readiness). It biases our brain and body toward action as opposed to inaction.

Alcohol tends to decrease autonomic arousal (less alert). Alcohol reduces inhibition (which makes us do more things, talk more, engage in activities, etc.) and then acts as a sedative effect.

Caffeinated Alcohol beverages increase impulsivity and aggressive behavior.

Self Regulation
Self-regulation is key to decreasing the likeliness of aggressive behavior.

Carnitine supplementation improves symptoms of ADHD and reduces aggressive behavior by enhancing self-regulation. Doses: twice daily, after meals. 100mg per kg.

20/04/2022

Hormones and health.

Six pillars of hormone health: (1) diet (specifically caloric restriction); (2) exercise (specifically resistance training); (3) stress & stress optimization; (4) sleep optimization; (5) sunlight; (6) spirit – dial in the body, mind, and soul connection.

Think of yourself as a Venn diagram: you have a body, mind, and soul – you can’t completely be well if you’re missing the health of one area.

Tip to get your doctor to order more bloodwork than the basic panel: tell your doctor your (fill in the blank) – energy, sleep, endurance, etc. – is not as good as it used to be.

High alcohol intake and smoking ma*****na will ultimately decrease testosterone.

Caffeine has a negligible effect on hormones.

Vegans: you are possibly at risk of not getting enough of certain types of fats and nutrients to maintain a proper ratio of testosterone to estrogen – supplement with algae or other healthy fats.

To naturally increase growth hormone output: don’t eat within 2 hours of sleep, get good deep sleep, resistance exercise early in the day, manage stress.

A word of caution about peptides: work with a physician! There are so many bad quality peptides with detrimental side effects.

How To Approach Hormone Health.

“Doing a little amount of lifestyle interventions over a long period of time is going to be far more helpful or efficacious than doing a lot than doing nothing, then doing a lot, then doing nothing".

Six pillars of hormone health: (1) diet (specifically caloric restriction); (2) exercise (specifically resistance training); (3) stress & stress optimization; (4) sleep optimization; (5) sunlight; (6) spirit – dial in the body, mind, and soul connection.

Diet should be an individualized approach – your goals and genetics should dictate your diet, not fads or what others are doing.

Ideally, get bloodwork every 3-6 months for preventive purposes – even better if you can get one while fasting and one while not fasting
“The more you’re doing zone 2 cardio, the slightly less important your caloric restriction is.”

Men, how to know whether you should use caloric restriction: if you’re obese or have metabolic syndrome, the caloric restriction will increase testosterone in men.

“There’s nothing special about intermittent fasting or caloric restriction or exercise when it pertains to body weight in general. When you lose weight about 33% of that is lean body mass and about 10% of fat cells are lean body mass.”

The reason for exercise, caloric restriction, and intermittent fasting in general: it’s how you increase healthspan, not necessarily change the weight on the scale.

Intermittent fasting & effects on hormones:

More significant spike in growth hormone and IGF-1 levels which will help in older age groups than younger – the longer you fast, the bigger the spike.

Major functions of IGF-1 and IGF-2: growth hormone acts on the liver to produce IGF-1 which is the active form of growth hormone with a much longer duration of action.

Potential underlying hormonal causes of poor sleep: (1) growth hormone deficiency (very rare); (2) vasomotor symptoms of menopause or andropause (very common); (3) being on testosterone replacement therapy (TRT) increases the risk of sleep apnea.

Testosterone In Women.

For health optimization: it’s just as important to know testosterone levels as it is to know estrogen and progesterone levels.

For pathology prevention (e.g., breast cancer): it’s more important to know estrogen and progesterone.

Women think they have very low testosterone levels because tests generally look at free testosterone which is the smallest proportion of testosterone in the body.

If you look at the total amount of DHEA (weak androgen) and testosterone in a woman, it’s more than estradiol but it’s in different measurements.

Testosterone in pre-menopausal women comes from theca cells in ovaries.

Women with endometriosis are candidates for tongkat ali.

Testosterone In Men.

“Testosterone is not going to cause prostate cancer, however, normal aging causes prostate cancer and testosterone will grow your prostate cancer.”

The question is really, do you want to take something that will definitely grow prostate cancer once you have it?

Men, be sure to check prostate-specific antigen (PSA) levels – also be aware, overweight and obese men have higher rates of prostate cancer.

Tips to maintain prostate health: prostate is right by the colon so make sure you have regular bowel movements, be aware of any genetic predisposition to an enlarged prostate, there’s an interesting correlation between having female offspring and prostate cancer, check estrogen levels (there’s a link to high estrogen and prostate cancer), make sure CRP levels are low.

TRT’s goal is steady-state with minimal peaks and troughs.

General TRT doses: 100-120mg/week divided over 2-3x per week – but there is a law of diminishing returns here, TRT has its trade-offs so you have to find the right level for you.

Very few people need aromatase inhibitors – there are a lot of ways to control estrogen through lifestyle or other interventions without the potency of aromatase inhibitors.

Non-traditional supplements which increase testosterone: creatine, tongkat ali, stinging nettles, boron, turkesterone, fadogia acrastis
Tongkat ali (from Indonesia) regimen: 11 months on, 1 month off because it does affect aromatase and is an estrogen receptor modifier.

Fadogia acrastis (shrub from Nigeria): can increase testosterone by stimulating luteinizing hormone release and receptor sensitivity – but there’s not a lot of evidence supporting long term use.

Tongkat ali + fadogia acrastis regimen: cycle 3 weeks on, 1 week off
Boron dosage: 3-6mg 1-2x per day.

Dihydrotestosterone.

Dihydrotestosterone (DHT): an androgenic hormone on the X chromosome (so its from the mother).

DHT is responsible for male pattern baldness so you can look to the males on your mother’s side – the better your androgen receptor works, the more likely you are to experience male pattern baldness.

Role of DHT:
In central nervous system: activates androgen receptor gene and helps make effort feel good and motivating.

In the cardiovascular system: androgen receptors are present in heart tissue
Impact of diet on DHT: a diet high in bioavailable plant polyphenols (such as curcuminoids, turmeric, black pepper) inhibits an enzyme that converts testosterone to DHT – but don’t worry, effects are nearly always reversible.

Creatine can increase the conversion of testosterone to DHT.

If you’re worried about hair loss, creatine can potentially add fuel to the fire – but if the follicle is still there the hair will come back after a few months.

Diving Deeper Into Hair Loss.

There are two types of hair loss: (1) male pattern baldness/androgenetic alopecia; (2) other types of alopecia .

For androgenetic alopecia: you want something to decrease the activity of androgen receptors – most promising treatment is dutasteride mesotherapy (localized injections in vulnerable areas).
Women can get male pattern baldness.

Polycystic Ovarian Syndrome (PCOS)
“This is one of those diseases that is underdiagnosed. Its prevalence is much higher than we think.”

Most women don’t know they have PCOS until they have infertility or subfertility.

PCOS is usually diagnosed in the 30s
Symptoms of PCOS: androgen excess (symptom would be excessive hair growth, deepening of the voice, etc.), insulin resistance, oligomenorrhea (more than 35 days between periods or less than 9 per year), infertility.

If living with PCOS: be vigilant about addressing insulin resistance and insulin sensitivity (talk to a doctor about inositol variation, metformin).

Female Contraception & Effects On Hormone Output.

Perceptual effects of oral contraception: some studies have shown that there’s a shift in how men and women perceive attractiveness in each other among women who take oral contraceptive.

Almost all contraceptives have a synthetic estrogen and progesterone.

Ethanol estradiol (common synthetic estrogen): 100x more potent than endogenous estradiol in the liver so binds to estrogen receptor in the liver and increases s*x hormone-binding globulin which decreases free-testosterone and DHT.

Oral contraceptive blunts increase testosterone that occurs before ovulation and usually come with an increase in libido.

Effects of contraception on fertility: if contraception is taken 6-12 months, fertility is likely equitable as baseline; beyond 12 months it’s still unlikely to have a long term effect on fertility unless you are experiencing side effects of the contraception such as insulin resistance.

Social Interactions & Relational Effects On Hormones.

Feelings about a new partner or love interest are largely regulated by the dopamine system.

There’s a lot of pheromonal and hormonal crosstalk that happens in relationships between men and women.

Prolactin & estrogen are close cousins: prolactin inhibits the release of testosterone from the pituitary glands.

Prolactin helps with nesting and breastfeeding.
Building in “prolactin adjustments” can be helpful for your relationship: take some time away from each other so it’s exciting when you see each other – prolactin and dopamine are inversely related.

Plan ahead to have good times if you know you are going to enter a tough period or crisis in your relationship.

In long-distance relationships: the dopamine remains high until you are together for a longer period of time and the hormones adjust.

Pelvic Floor.

If you don’t know where the pelvic floor is – think of your body as a box: your abs are the front of the box, your back is the back of the box, your diaphragm is the top of the box, your pelvic floor is the bottom and serves as your port to the outside world.

Prostate, bladder & urinary health: phosphodiesterase and tadalafil (low dose is not arousing) can help will flow regularity and decrease nighttime urination trips.

A daily low dose of tadalafil is becoming a more common regimen for men’s health.

Other Notable Hormones.

HCG is (1) a hormone produced during pregnancy; (2) fertility treatment; (3) can help maintain testicular function while on testosterone.

HCG: when a woman is pregnant her HCG levels double every 48 hours, preventing hypothyroidism in pregnancy.

L carnitine can support fertility and can increase the density of androgen receptors – and can be supplemented or found in food but isn’t very bioavailable; you can find injectable L carnitine – try 500mg-1g per day.

Effects Of Ma*****na And Alcohol On Testosterone.

Cannabinoids will not reduce testosterone by themselves.

Smoked ma*****na promotes significant reductive activity in aromatase (which converts testosterone to estrogen).

Note, high-fat diets also promote aromatase activity.
Pot smokers have a higher rate of development of gynecomastia (male development of breasts).

High alcohol intake will decrease testosterone (as will any gabba agonist, which you want to be cautious to not take gabba daily).

Interestingly, the American Heart Association recommends females consume 0-1 servings of alcohol per day and men consume 1-2 servings of alcohol per day.

Alcohol recommendation: it’s better to have 2 drinks of alcohol 1-2 days per week than drink every day.

Additional Lifestyle Factors That Can Affect Hormones.

An ice bath will help overheated te**es
“Temperature is the enemy of te**es. They like to be 5-10 degrees cooler than the rest of the body.”

Avoid saunas if you are experiencing infertility or have a low s***m count – but the real enemy is warm water (i.e., warm bath, whirlpool bath) which raises the temperature of the te**es faster than a sauna.

Ice bath increases the activity of beta-adrenergic receptors.

Peptides & Prescription Drugs.

Most hormones we make have been synthesized and are available by prescription from a physician.
Caution: anytime you inject something, you will shut down your own production of that hormone.

Peptides: short sequences of amino acids that resemble hormones enough, they mimic the effect of hormones in the body – some peptides change gene expression and set pathways for continued production of the hormone of interest.

Peptides increase healing rates, weight loss, recovery, etc., and are used by actors, athletes, etc.
Therapeutic peptides are prescribed by physicians.
Body protective compound (BPC-157): identical to the protein found in the stomach used to treat disorders in intestine.

BPC-157 is tolerated for short periods of time and the most prescribed peptide.

Benefits of BP-157: the healing of many different types of tissue from tendon, muscle, and the nervous system, increases blood flow back to injured sites, protects organs, prevents stomach ulcers and heals skin burns.

LONELINESS AND YOUR BRAIN.The default network of the human brain is associated with perceived social isolationHumans sur...
22/03/2022

LONELINESS AND YOUR BRAIN.

The default network of the human brain is associated with perceived social isolation

Humans survive and thrive through social exchange. Yet, social dependency also comes at a cost. Perceived social isolation, or loneliness, affects physical and mental health, cognitive performance, overall life expectancy, and increases vulnerability to Alzheimer’s disease-related dementias. Despite severe consequences on behavior and health, the neural basis of loneliness remains elusive. Using the UK Biobank population imaging-genetics cohort (n = ~40,000, aged 40–69 years when recruited, mean age = 54.9), we test for signatures of loneliness in grey matter morphology, intrinsic functional coupling, and fiber tract microstructure. The loneliness-linked neurobiological profiles converge on a collection of brain regions known as the ‘default network’. This higher associative network shows more consistent loneliness associations in grey matter volume than other cortical brain networks. Lonely individuals display stronger functional communication in the default network, and greater microstructural integrity of its fornix pathway. The findings fit with the possibility that the up-regulation of these neural circuits supports mentalizing, reminiscence and imagination to fill the social void.

22/03/2022
Brain doesn't have pain receptors.
21/03/2022

Brain doesn't have pain receptors.

The science of love, desire and attachment:  • In all romantic attachments there is an autonomic coordination. Autonomic...
16/02/2022

The science of love, desire and attachment:

• In all romantic attachments there is an autonomic coordination. Autonomic coordination is the key to love, desire and attachment.
• You don’t have to find someone just like you or just opposite to you. Matching of same to same or same to different can both be effective. There is not one sole form of attachment.

Attractiveness of women during pre-ovulatory phase of their menstrual cycle
• Men find women more attractive when they are in the pre-ovulatory phase of their cycle.
• Women in the pre-ovulatory phase find men more attractive.
• If a woman is taking oral contraception, it eliminates this effect.

Childhood attachment styles
They are measured by the Strange situation task: involves a parent bringing their child to a room with a stranger. At some point, the mother leaves and then comes back in. The study measures how the child reacts to the mother leaving and returning. Findings: There are four basic attachment styles displayed by children.
1. Secure: Children who are securely attached are generally happy and trusting. They are attached to their parent or caregiver and enjoy being with them, but are secure enough to explore the world and test the limits of their independence.
2. Avoidant: Children with an avoidant attachment style may be emotionally distant, often preferring to play and interact with objects rather than people. They may be wary of physical contact like hugs and cuddles. A child with an avoidant attachment style often displays early signs of independence, wanting to do things themselves rather than seek help from their parents or other adults.
3. Ambivalent: An ambivalent style in childhood is characterized by high levels of anxiety and insecurity. Children with this attachment style may seem clingy, and more frequently seek the attention of their parent or caregiver, yet may reject that attention when it is offered. They may also be particularly wary of strangers.
4. Disorganized: Children with a disorganized attachment style often seem to struggle with managing their emotions. They may display anger and erratic behavior, but are just as likely to seem depressed, withdrawn, and unresponsive.

– How we attach to our primary caregivers influence how we attach to romantic partners. The same neural circuits that underlie between child-parent are the same that are used for romantic relationships.
– The childhood attachment style is strongly predictive as the adulthood attachment style in romantic relationships. We are hard-wired for attachment. When a mother and child interact, the brain of the child and mother enter in a coordinate state.
– We have a template that we use for relationships that are the same we use when we were babies. These templates can shift over time (the key is the knowledge that they can change).These neural circuits are plastic. If you were an ambivalent child, it doesn’t mean you can’t grow to be a securely attached adult.
– Book recommendation. Attached: The New Science of Adult Attachment and How It Can Help You Find and Keep Love
– Secure attachment allows a stable autonomic equilibrium. The ability to remain calm, and clear headed. You are able to navigate thru discomfort with some sense of clarity. The secure attachment leads to the most stable long term relationships.

Three neural circuits involved in Love, Desire & Attachment.
1. Autonomic nervous system
2. Neural circuits for empathy (see and respond and match to the autonomic tone of the other).
3. Neural circuits associated to positive delusions.

1. Autonomic nervous system
The autonomic nervous system controls things like digestion, breathing, how alert or sleepy we are. It’s hard-wired, but thru interaction with our parents, we develop a tendency of calmness or alertness or a combination of these. It’s like a see-saw. We can be very calm, very alert, or in the middle. The interactions between child and caregiver take the child and caregiver from one end of the see-saw to the other.
• If the mother is very stressed, the children physiology shows stress as well. And this stress remains for very long.
• Sighs tends to make us more calm.
• Ice baths or hyper-ventilation increase sympathetic nervous system (more alertness).
The autonomic nervous system dictates how we will react to a romantic partner being present or leaving.
The attachment style predicts the feelings after a break-up
Co-dependence can be misinterpreted, it’s not necessarily bad. Healthy interdependence: happens when a person goes away and we can still regulate our own autonomic nervous system.

2. Neural circuits for Empathy
- EMPATHY: autonomic matching. It means that there’s a match of emotional tone.
- Sometimes is beneficial to go in the same state as the other, and sometimes not.
- One pre-requisite to the propagation of species is the notion of autonomic regulation and matching autonomic nervous systems. The mating behavior is one of autonomic regulation (the process of finding a mate is one of elevated autonomic arousal -dopamine and epinephrine release… which involves the sympathetic nervous system-). The s*xual arousal itself it’s driven by the parasympathetic system. The or**sm and ej*******on response is sympathetic driven. After ej*******on, parasympathetic kicks back in and there’s calm and relaxation.
- Arch: sympathetic arousal for pursuit. Parasympathetic for s*xual arousal. Then sympathetic response for ej*******on and or**sm. Then return to Parasympathetic. Every human is required to go thru this to reproduce.
- The neural circuits for this reside in the autonomic nervous system and are coordinated with empathy.
- The prefrontal cortex is used to perceive things and make decisions.
- The insula is a brain area that allows to pay attention to what happens inside our body and to split some of that attention to the exterior. The mating dance is a coordinated activity of two bodies in which the ANS of one is coordinating with the ANS of the other and the Insula is splitting one’s attention between how we feel ourselves with the thinking and feelings of the other. It’s how we assess if the other is comfortable, aroused, etc. So, it’s the way empathy works.

3. Neural circuits associated to positive delusions.
- Self-Delusion: implies cynicism about love and attachment.
- The neural circuits that are active with love can actually be active thru different mechanisms, not just love by THAT one person.
- Desire love and attachment are three different phases of romantic relationships.
- The insula cortex is strongly activated by touch. Touch
- Positive delusion is predictive of long term attachment: “only this person can make me feel this way”.

4 horsemen of apocalypse for relationships
• Criticism. When you criticize your partner you are basically implying that there is something wrong with them.
• Defensiveness. When you attempt to defend yourself from a perceived attack with a counter complaint you are being defensive.
• Stone walling. Happens when the listener withdraws from the conversation. Emotional response is completely cut off. It’s like focusing on own internal state.
• Contempt. When you put yourself on a higher ground than your partner. You feel that a person is beneath consideration, worthlessness or deserving scorn… Disregard for something that should be taken into account. It’s the antithesis of empathy and positive delusion. Inversion of the circuits for desire, love and attachments.
Book: The Seven Principles for Making Marriage Work: A Practical Guide from the Country’s Foremost Relationship Expert
Resource: The Gottman Institute Love Lab: A Research-Based Approach to Relationships

Selecting mates
S*x drive or desire may be a way to forage for a potential love partner.
Four groups:
1. Dopamine high. High sensation seeking, they like novel things. People in this group tend to pair up with the same group.
2. Serotonin high. Tend to like and follow rules. They like stability more than spontaneity. People in this group pair up within this same group.
3. Testosterone high (The Director). Tend to be very directive. They tend to know what they want. They are challenging to be around, and they push the other people. They pair up with the estrogen category.
4. Estrogen High (The Follower). Preferences: nurturing. They like being heard, and when someone else makes the hard decisions.
Thru a recognition of these categories exist, we can gain better self-awareness and navigate healthier mate seeking, breakups and long-term relationships. In all romantic attachments there is an autonomic coordination.

12/02/2022

Coffee and Alcohol:

In 2018, Karina Fischer and her colleagues examined a broad range of single foods, exploring whether there are universally applicable patterns of foods that are protective against Alzheimer’s disease and memory decline. They looked at the effect on memory of red wine, white wine, coffee, green tea, olive oil, fresh fish, fruits and vegetables, red meat, and sausages.

They found that only red wine had an impact—at least in men. For women, drinking red or white wine increased their risk of memory decline. However, in 2019, Jürgen Rehm and his colleagues reviewed twenty-eight studies on the connection between alcohol use and dementia performed between 2000 and 2017. Overall, Rehm found that light to moderate alcohol use in middle to late adulthood was associated with a decreased risk of cognitive impairment and dementia.

However, heavy alcohol use increased the risk of all types of cognitive impairment and dementia. Archana Singh-Manoux and his colleagues followed 9,087 people over twenty-three years to see how alcohol related to the incidence of dementia. In 2018 in the British Medical Journal, they reported that people who had abstained from alcohol completely or who consumed more than 14 drinks per week had a higher risk of dementia compared to those who drank alcohol in moderation.

Though international recommendations for alcohol use vary widely, according to the Centers for Disease Control, light alcohol use refers to fewer than 3 drinks per week. Moderate alcohol use refers to more than 3 but fewer than 14 drinks per week for men and fewer than 7 drinks per week for women. Heavy alcohol use refers to more than 14 drinks per week for men and more than 7 drinks per week for women.

However, given the findings of the studies mentioned here, for maximum memory protection I recommend staying between light drinking and moderate drinking guidelines. For my patients, that means roughly 3 drinks per week for women and 5 drinks per week for men. Of course, alcohol can have many negative health effects as well, so drinking according to either the CDC’s recommendations or the guidelines I suggest only makes sense after talking to your primary care physician about other risk factors.

Coffee:

In 2017, Boukje van Gelder and her colleagues reported on 676 elderly men they had studied over ten years to see if coffee protected them from cognitive decline. They found that men who drank coffee had less cognitive decline than those who didn’t. The greatest effect was seen in those who drank 3 cups of coffee a day, with those who drank more or less seeing less dramatic effects. In 2009, Marjo Eskelinen and her colleagues reported on a group of people they had followed over twenty-one years to see if coffee helped cognition.

They found that coffee drinkers at midlife had a lower risk of dementia and Alzheimer’s disease later in life compared with those who drank no coffee or up to 2 cups per day. The lowest risk of dementia was found in people who drank 3–5 cups of coffee per day. There are a number of ways in which coffee might protect the brain.

Caffeine, which increases serotonin and acetylcholine, may stimulate the brain and help stabilize the blood-brain barrier. The polyphenols in coffee may prevent tissue damage by free radicals as well as brain blood vessel blockage. Trigonelline, a substance found in high concentration in coffee beans, may also activate antioxidants, thereby protecting brain blood vessels.

However, not every substance in coffee is helpful. Unfiltered coffee contains natural oils called diterpenes, which increase LDL cholesterol levels, potentially resulting in thickening and hardening of the walls of the arteries in the brain (though they do have some helpful anti-inflammatory properties). Acrylamide, a chemical formed when coffee beans are roasted, can inhibit neurotransmission, destroy dopamine neurons, and increase oxidative stress.

The amount of acrylamide in coffee can vary; dark-roasted, fresh coffee beans generally have the lowest amount. The wide range of chemicals in coffee is probably why current researchers do not believe that the protective effect of coffee against dementia is conclusive enough to make a formal recommendation. However, know that there are more good effects than bad of moderate coffee consumption (about 2–4 cups per day) and that it could have benefits later in life. Remember to keep your overall caffeine consumption under 400 mg/day.

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