23/01/2026
Better sleep. Better brain. Better life.
Sleep is nature’s most powerful anti-aging remedy. One night of quality rest can activate deep cellular repair and renewal throughout the body. While we sleep, vital processes take place that restore our brain and nervous system. When sleep is missing, the effects are immediate: mental fog, slower reactions, low energy, and a body that feels out of balance.
For anyone who struggles to fall or stay asleep, life quality quickly declines. That’s why sleep has become one of the most valuable forms of wellness today. At elite wellness retreats and medical centers around the world, the simplest but most important advice is always the same: aim for seven to eight hours of sleep every night.
According to Dr. Alejandro Bello, a specialist in sleep and integrative medicine at SHA, sleep is essential for repairing the brain and nervous system. “Scientists have discovered that the brain has its own cleansing system—similar to the lymphatic system—that removes toxins and waste,” he explains. “But this process only works during REM sleep, the deepest phase when rapid eye movement occurs. It’s like the brain takes out the trash every night.”
This is why experts now focus on sleep architecture—not just how long you sleep, but how well you move through each stage, especially REM. Too many micro-awakenings disrupt this process and reduce the benefits of rest.
During deep sleep, the brain clears cerebrospinal fluid of tau proteins, which are linked to Alzheimer’s disease. Research shows that chronic sleep deprivation increases the risk of dementia and cognitive decline.
Sleep also plays a major role in learning and memory. Studies with Harvard University students found that people who go to bed and wake up at consistent times perform better academically. That’s because while we sleep, the brain converts short-term memories into long-term ones.
New research also links sleep to metabolism and hormone balance. Poor sleep lowers testosterone levels and affects reproductive health in both men and women. It also weakens the immune system and increases inflammation.
“REM sleep is closely tied to emotional balance,” says Dr. Bello. “It helps regulate fear, anxiety, and stress by resetting the nervous system.”
Despite its importance, sleep is often neglected. “Not sleeping enough is serious,” Dr. Bello warns. “It shortens life and leads to illness. People must value sleep the same way they value nutrition.”
Rather than immediately turning to sleeping pills or melatonin, Dr. Bello advises finding the root cause of sleep problems. “Medication doesn’t guarantee quality sleep—it simply makes you unconscious. It doesn’t improve the natural structure of sleep, even though people think it does.”
Melatonin supplements, for example, replace a hormone the body normally produces in response to darkness. But modern life—with constant lighting and screen exposure—disrupts that natural rhythm.
“Melatonin pills create tolerance over time,” he explains. “You need higher and higher doses to get the same effect. It’s far better to support your body’s natural melatonin production by changing your habits.”
His top recommendations include:
Turning off screens at least two hours before bed
Dimming lights after 8 p.m.
Creating a calm evening routine
Avoiding stimulating content and social media at night
At home, Dr. Bello uses candlelight in the evening to help his body naturally prepare for sleep. He also advises keeping the bedroom cool—around 18°C (64°F)—because the brain needs to lower body temperature slightly to enter deep sleep.
Before bed, it’s important to slow down gradually. Reading, journaling, listening to soft music, meditating, or reflecting on the day all help the brain shift into rest mode. Going to bed with unresolved stress or racing thoughts is one of the biggest obstacles to falling asleep.
“The bed shouldn’t be the place where you solve your problems,” Dr. Bello says. “That’s the worst time to think about them.”
A dark, quiet, cool bedroom—free from screens and artificial light—creates the ideal environment for restorative sleep.
Because sleep is so vital, SHA has developed a specialized Sleep Well Program that uses advanced technology and integrative medicine to identify what’s disrupting a person’s natural rhythms. The goal is to restore deep, healing sleep—so the body can reset, repair, and prepare you for a better day ahead.
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