Dr. Gem Marq Mutia - Adult Medicine

03/05/2026

We have normalised over consumption and that's greatly draining our lives...

02/05/2026

Adherence to the cancer prevention recommendations from the prestigious American Institute for Cancer Research isn’t just associated with higher survival in cancer patients and lower risk of dying from cancer, but lower risk of dying overall. https://bit.ly/3Ol8Nfs

02/05/2026

02/05/2026

A pediatrician at a national medical meeting was asked why she could not rest. Her answer: "If I stop, I will fall." She was describing the mountain she climbs every day in clinic.

That is the contract medicine has every one of us signed to, and almost no one says it out loud.

Roxanne Almas, a developmental-behavioral pediatrician, lost her mother to an aggressive cancer eighteen months after diagnosis while her father lived with advanced Parkinson's. She returned to clinic. Of course she did. Medicine asks every one of us to push through maternity leave, push through parenting, push through perimenopause, push through grief. There is almost no processing built into the job. We come back, and we keep climbing.

That is not a wellness problem. That is a culture that has trained an entire profession to believe rest is the thing that breaks you, when rest is the thing that holds the energy.

She uses the August Lily as the image. The plant photosynthesizes through spring, then drops every leaf, then stores all of that energy underground for months before it ever flowers. The flower is not the work. The bulb is the work. Athletes know this. Pilots are legally required to know this. Physicians are the only high-stakes profession told to skip the part where the energy gets stored.

The piece that landed hardest: ask yourself who modeled rest for you. Most of us cannot name anyone. Almas can. Her father came home from work, took his shoes off, and gave himself fifteen minutes alone in his room before he was present with his family. Fifteen minutes. That was the model.

If you have ever come straight from the parking garage to dinner and wondered why you could not really hear your kid, that fifteen minutes is the answer you were never given.

Send this to the colleague you keep telling to slow down.

Listen to the full conversation on The Podcast by KevinMD. Link in the comments.

Is rest treated as part of the work in your specialty, or as the reward at the end of it?

01/05/2026

Microplastics in human tissue stopped being a theoretical concern in 2024. Three studies in top journals over the past two years have moved this from "possibly relevant" to "directly measured in human blood and atherosclerotic plaque."

Marfella and colleagues (2024, New England Journal of Medicine) ran the study that changed the conversation. 304 patients undergoing carotid endarterectomy for asymptomatic carotid artery disease had their excised plaque specimens analyzed for microplastics and nanoplastics using pyrolysis-gas chromatography-mass spectrometry, stable isotope analysis, and electron microscopy.

257 patients completed a mean 33.7-month follow-up. Polyethylene was detected in plaques from 150 patients (58.4%), at a mean concentration of 21.7 µg per milligram of plaque tissue. 31 patients (12.1%) also had measurable polyvinyl chloride. Electron microscopy showed visible, jagged-edged foreign particles inside plaque macrophages. Patients with detectable microplastics in their plaque had a hazard ratio of 4.53 (95% CI 2.00 to 10.27, p

01/05/2026

The assumption that fresh produce is nutritionally superior to frozen is one of the most durable beliefs in modern eating. It is also not what the data shows.

Bouzari and colleagues (2015, Journal of Agricultural and Food Chemistry) ran a controlled comparison at UC Davis, measuring four vitamins across eight commodities (corn, carrots, broccoli, spinach, peas, green beans, strawberries, blueberries) under both fresh and frozen storage conditions. The vitamins were ascorbic acid (vitamin C), α-tocopherol (vitamin E), riboflavin (B2), and β-carotene. Each commodity was sampled at three storage time points per condition.

For vitamin C, frozen samples were higher than fresh in 3 of 8 commodities and statistically equivalent in the remaining 5. Frozen lost in zero of eight comparisons.

For α-tocopherol, the pattern was identical. Frozen higher in 3 of 8, equivalent in the remaining 5, and never lower.

For riboflavin, 6 of 8 commodities showed no difference. Broccoli was higher in frozen, peas were higher in fresh. A wash.

For β-carotene, the pattern flipped. β-carotene was only present in measurable amounts in 5 of the 8 commodities (not in blueberries, strawberries, or corn). Of those 5, frozen was lower in 3 commodities (peas, carrots, and spinach showed measurable losses), with the remaining commodities showing no significant difference. β-carotene is the one vitamin where fresh tends to win.

The mechanism behind this pattern is straightforward. Frozen vegetables are blanched and frozen within hours of harvest, locking in the nutrient content at peak. The storage chain that follows ("the freezer aisle") is biochemically stable. Vitamin C, in particular, is held essentially indefinitely at standard freezer temperatures.

"Fresh" produce, by contrast, takes a different path. Commercial fresh vegetables are harvested days before they reach the supermarket. They sit in cold-chain transit for 3 to 7 days. They sit on display for 1 to 3 days. Then they sit in your refrigerator for another 3 to 7 days before you cook them. The full journey from field to plate is often 7 to 17 days, and vitamin C degrades meaningfully across that window.

By the time a head of broccoli has been in your fridge for a week, the frozen broccoli in the freezer aisle has retained more of its vitamin C than the "fresh" alternative on your plate. That is the finding.

What this does not mean. Frozen is not universally superior. β-carotene losses are real for some vegetables. Texture, taste, and certain phytochemicals not measured by Bouzari may differ between fresh and frozen. Garden-harvested produce eaten the day it is picked is a different category entirely and is not what this study measured. The relevant comparison is supermarket "fresh" vs. supermarket "frozen," which is what most people are actually choosing between.

What this does mean. The "fresh is better" assumption that drives produce purchasing decisions is not supported by the data on vitamin retention. For vitamin C and vitamin E, frozen vegetables are at least as good as fresh in every commodity tested, and better in nearly half of them. For most home cooks, the practical implication is that the frozen aisle deserves a serious look, especially for vegetables you will not get to within a couple of days of buying.

A note on the study itself. Bouzari 2015 measured 8 commodities and 4 vitamins. It is not a meta-analysis. It is a single well-designed study from UC Davis that has been broadly consistent with the wider food science literature. The findings would be stronger if replicated across more commodities and more nutrients, but the underlying biochemistry is well-understood and not in serious dispute.

Same vegetable. Different supply chain. Different vitamin retention.

Bouzari et al., Journal of Agricultural and Food Chemistry, 2015

01/05/2026

You can create fiber inside food that didn't have it before. The trigger is temperature.

When you cook starchy food, water enters the starch granules and the long amylose and amylopectin chains unfold. This is gelatinization, and it's why hot rice, hot pasta, and hot mashed potato are so easy for your body to digest. The chains are loose, exposed, and your digestive enzymes break them down within minutes. Your blood sugar rises fast.

When you cool that same cooked starch, the chains do something interesting. They realign and partially recrystallize into a tightly ordered structure called retrograded starch. Your digestive enzymes can't break the crystals as efficiently. The starch reaches your colon largely intact, where your gut bacteria ferment it into short-chain fatty acids including butyrate. Resistant starch is especially butyrogenic compared to other fibers. The FDA and AOAC classify retrograded starch (resistant starch type 3) as dietary fiber for nutrition labeling purposes. Same molecule. Different physical structure. Different physiology.

The numbers across foods:

White rice (Sonia et al., 2015, Asia Pacific Journal of Clinical Nutrition). Researchers measured resistant starch in three preparations: freshly cooked, cooked and cooled at room temperature for 10 hours, and cooked and refrigerated at 4°C for 24 hours then reheated. Resistant starch went from 0.64 g per 100 g (fresh) to 1.30 g (room temp cooled) to 1.65 g (refrigerated and reheated). The clinical follow-up was a randomized crossover in 15 healthy adults. The cooled-and-reheated rice produced a meaningfully lower glucose response than the freshly cooked rice. Same calories, same ingredients.

Potato (Larder et al., 2018, Food Research International). Boiled potatoes cooled for 24 hours at 4°C had up to 114% more resistant starch than potatoes cooled for one hour at room temperature. The exact magnitude varies by cultivar.

Pasta (Hodges et al., 2019, Foods). Randomized crossover comparing freshly cooked pasta, cold pasta, and reheated pasta. Reheated pasta produced a smaller and faster-resolving glucose curve than freshly cooked pasta. The mechanism is the same starch retrogradation that happens in rice and potato.

A few honest caveats. First, "your enzymes can't break the crystals" is a simplification. Pancreatic amylase has reduced activity against retrograded starch but isn't blocked entirely. Some still gets digested. The functional shift is meaningful, not absolute. Second, the magnitude of the cooling effect varies by food, by cultivar, by cooking method, and by cooling time and temperature. Longer cooling at lower temperatures (24 hours at 4°C beats 10 hours at room temperature) produces more retrogradation. Third, repeated extreme reheating can partially reverse retrogradation, but normal microwave or stovetop reheating does not.

Practical implication. If you eat rice, pasta, or potatoes regularly, cooking a batch and refrigerating overnight before reheating roughly doubles the resistant starch content of the same food. Your post-meal glucose response is lower. Your colon gets more butyrate. The fiber on the nutrition label is what was in the raw ingredients. The fiber you actually consume depends on how you cooked and stored the food before eating it.
Same food. Different temperature history. Different physiology.

Sonia et al., Asia Pacific Journal of Clinical Nutrition, 2015 Hodges et al., Foods, 2019
Larder et al., Food Research International, 2018

01/05/2026

Your body doesn't age as one unit. Stanford researchers can now measure 11 organs separately, and roughly 1 in 5 people has organs aging at meaningfully different rates.

Each organ sheds specific proteins into your blood. The liver leaks hepatic proteins. The pancreas leaks pancreatic proteins. The heart leaks cardiac proteins. Plasma proteomics measures thousands at once. Apply machine learning, and you can build a separate aging clock for each organ from a single blood draw.

Oh et al. (2023, Nature) validated 11 organ-specific aging clocks in 5,676 adults across 5 independent cohorts. Roughly 20% of the population had at least one organ aging significantly faster than the rest of their body. Heart aging alone conferred 250% higher heart failure risk. Brain and vascular aging predicted Alzheimer's progression as strongly as plasma pTau-181, currently the best blood-based biomarker for the disease.

Then came the 20-year data. Whitehall II tracked 6,235 middle-aged adults for two decades (Kivimäki et al., 2025, Lancet Digital Health). Organ ages measured from a single baseline blood draw predicted 30 different age-related diseases over the following 20 years. Six diseases were predicted exclusively by aging in their corresponding organ. People whose liver was aging faster than the rest of their body were more than twice as likely to develop liver failure.

Accelerated heart aging raised the risk of dilated cardiomyopathy by about two-thirds and chronic heart failure by about half. Accelerated lung aging raised lung cancer risk by roughly 30%.
A 50-year-old whose heart is aging at 53 and kidneys at 39 has a fundamentally different risk profile than one whose values are flipped. Commercial "biological age" tests collapse eleven separate signals into a single output. That single number hides the signal that actually matters: which organ is leading the decline.

One important context. The Stanford lab that discovered organ clocks (Wyss-Coray, Oh) co-founded Teal Omics to commercialize the test. Stanford filed a patent on the method. No clinical-grade panel exists for purchase today. Most of the validation work to date has been conducted by people with financial interest in the technology becoming a commercial product. This is common in early-stage biomarker research. It is not disqualifying. It is something to know.

Until clinical-grade panels are available, the practical lesson holds. One number cannot tell you where to focus. Eleven can. Focus on the modifiable behaviors that protect the organ you are most worried about based on family history, current biomarkers, and known exposures. The averaged number works for marketing. It does not work for prevention.

Oh et al., Nature, 2023
Kivimäki et al., Lancet Digital Health, 2025

01/05/2026

The bottle of olive oil in your pantry is not the same oil it was when you bought it. The oxidation chemistry begins the moment the seal is broken, and the bioactive compounds that distinguish extra virgin olive oil from generic vegetable oil decline measurably over the months that follow.

Rastrelli and colleagues (2002, Journal of Agricultural and Food Chemistry) ran a controlled storage study at the University of Salerno. Two extra virgin olive oils from Calabria were stored for one year under four conditions: dark or colorless glass bottles, filled completely or half-filled, all at room temperature. The researchers tracked α-tocopherol, polyphenols, squalene, and polyunsaturated fatty acids over the year using HPLC and GC-MS.

α-tocopherol oxidized first. By 2 months it had dropped 20 percent. By 12 months it had dropped 92 percent. The half-empty bottles showed the most pronounced changes, consistent with greater oxygen exposure per unit of oil. The pattern reflects α-tocopherol's role as a sacrificial antioxidant. It oxidizes preferentially, protecting the polyphenols and squalene during the early months of storage. Once α-tocopherol is depleted, the polyphenols become vulnerable.

Squalene and o-diphenols (the broader polyphenol fraction) were protected in the early months. They began to decline significantly only after 6 to 8 months, after the antioxidant defenses had been substantially consumed. The polyunsaturated fatty acids themselves remained stable for about 8 months and only began to oxidize once the antioxidants were largely gone.

Half-empty bottles degraded faster than full bottles. The mechanism is straightforward: more headspace means more oxygen exposure per unit of oil, accelerating the oxidation cascade. Light exposure also influenced degradation, with colorless bottles showing accelerated changes compared to dark glass.

Malheiro and colleagues (2018, Food Research International) ran a parallel storage study tracking volatile compounds and quality parameters across 12 months. Their findings reinforced the pattern. Even oils still classified as "extra virgin" by EU regulations after one year of storage had lost approximately 50 percent of phenolic compounds and 57 percent of oxidative stability. The legal classification remained but the bioactive content did not.

Di Stefano and colleagues (2020, Natural Product Research) extended the timeline to 18 months in dark glass at room temperature. Oleocanthal and oleacein (the secoiridoids that produce the characteristic peppery throat-burn of fresh extra virgin oil) decreased measurably. Tyrosol and hydroxytyrosol increased, which sounds positive until you realize they are largely the degradation products of the higher-value secoiridoids breaking down.

What this means in practice. The oil you are cooking with in October is not the oil you bought in March. The exact rate of decline depends on storage conditions, but the direction is consistent: lower α-tocopherol, lower polyphenols, lower oxidative stability over time. The bottle's label tells you nothing about the current state of the oil inside.

Three practical levers exist. First, buy smaller bottles. A 250 mL bottle finished in 6 weeks holds more bioactive content per cooked meal than a 1 L bottle finished in 6 months. Second, store the oil in a dark cool place. Dark glass and a pantry cupboard slow the curve. Heat above room temperature accelerates it (well-established food chemistry, though the specific studies above did not test temperature variation directly). Third, treat olive oil as perishable. The producer's harvest date is more informative than the "best by" date.

A few caveats worth noting. The exact rates above are from controlled laboratory storage in glass bottles at room temperature. Commercial supply chains add additional variability (transit temperature, retail display lighting, time on the shelf before purchase). Different cultivars and producing regions have different starting polyphenol concentrations, so a polyphenol-rich oil at month 12 may still exceed a polyphenol-poor oil at month 0. Storage in tin or dark green glass extends the curve but does not reverse it. The α-tocopherol data is from a single landmark study (Rastrelli 2002) and should be considered representative rather than universal.

The bigger principle. The compounds that make extra virgin olive oil functionally different from refined olive oil are oxidation-sensitive. They are why the oil is more expensive. They are also what you lose to time, oxygen, and light after the bottle is open. Treating EVOO like a stable pantry staple that lasts indefinitely is what most consumers do. The biochemistry says otherwise.

Rastrelli et al., Journal of Agricultural and Food Chemistry, 2002 Malheiro et al., Food Research International, 2018 Di Stefano et al., Natural Product Research, 2020

01/05/2026

The heart’s constant beating may actively suppress tumor growth in cardiac tissues, a new Science study reports. This is because cellular pathways in these tissues alter gene regulation in cancer cells to keep them from proliferating.

The findings shed light on the role of mechanical forces in protecting the heart from cancer and may pave the way to new cancer therapies based on mechanical stimulation.

Learn more: https://scim.ag/4eMSi9k