Sleepmaxxing

Sleep is the highest-leverage health intervention there is. Nothing else simultaneously sharpens your brain, repairs your body, regulates your hormones, and resets your immune system overnight. If your sleep is poor, fixing it will do more than any supplement stack on any other page.

Any serious healthmaxxer should plan the day entirely around sleep.

Why we sleep:

Consolidates memory and learning. During sleep, the brain replays the day and moves information from short-term storage (hippocampus) into long-term storage (neocortex). Skip the sleep and the day's learning doesn't get filed.

Clears metabolic waste from the brain. Deep sleep is when the brain runs its waste-clearance system, flushing out byproducts that build up while you're awake. Shortchange deep sleep and that clearance doesn't fully happen, which is part of why a bad night leaves you mentally foggy the next day and a bad week leaves you progressively duller.

Regulates hormones. Most daily testosterone release happens during sleep, growth hormone pulses in deep sleep, and the hormones governing appetite (leptin and ghrelin) are set overnight. Short sleep reliably lowers testosterone and leaves you hungrier the next day, with cravings skewed toward junk.

Resets the immune system. Sleep restocks immune function. Even one short night measurably drops immune cell activity, which is why you get sick after a run of bad sleep.

Tunes metabolism. Sleep regulates insulin sensitivity and glucose handling. A few nights of short sleep pushes healthy people toward a pre-diabetic glucose response.

Protects the cardiovascular system. Blood pressure dips during normal sleep, giving the heart and vessels a nightly recovery window. Chronically short sleep is linked to hypertension and worse cardiovascular outcomes.

Regulates emotion. Sleep restores the balance between the prefrontal cortex (rational control) and the amygdala (emotional reactivity). Underslept, the amygdala runs hotter, you're more reactive, more anxious, angrier.

Sleeping poorly for years is one of the most reliable ways to be sicker, sadder, dumber, and shorter-lived than you needed to be.

Two separate mechanisms decide when you sleep:

Sleep pressure (adenosine). From the moment you wake, a molecule called adenosine builds up in the brain. The more it accumulates, the sleepier you feel. After 12-16 hours awake, the pressure is high enough to make sleep feel urgent. Sleeping clears it, and you wake up with a low level again. Caffeine works by blocking adenosine's signal, it doesn't remove the adenosine, it just hides it. When the caffeine wears off, all that accumulated adenosine hits at once.

The circadian rhythm (your internal clock). A roughly 24-hour cycle, set slightly long in most people, that governs the timing of sleepiness, alertness, body temperature, and melatonin release. Melatonin is the hormone that signals "it's night" to the rest of the body, it rises in the evening as light fades, peaks in the middle of the night, and drops before morning. Because the clock doesn't run to exactly 24 hours, it needs a daily "reset" signal to stay aligned, and the dominant signal is light, specifically bright light in your eyes in the morning, otherwise the rhythm drifts later each night. The clock can only shift by roughly an hour per day, which is why jet lag leaves you misaligned for days.

Falling asleep happens when both systems point the same way: high adenosine pressure and your circadian clock saying it's night.

0- Foundation

Fixed sleep time everyday (weekends included). This is the single most effective sleep intervention there is. A consistent bedtime anchors the circadian clock, staying up on weekends drifts it and gives you a self-inflicted jet lag every Monday. Pick a bedtime you can hold seven days a week.

Morning light in your eyes. Within an hour of waking, get bright outdoor light, ideally 10+ minutes, more on a dim/overcast day. This is the dominant signal that resets the circadian clock and starts the countdown to that night's melatonin release.

Find your
Caffeine tolerance. Caffeine has a half-life of 5-6 hours, meaning a meaningful fraction of a 2pm coffee is still in your system at bedtime, quietly blocking adenosine. If you have any sleep trouble, an earlier cutoff can help you.

Dim and warm the lights in the evening. Bright blue-spectrum light light from screens and LEDs, suppresses melatonin and tells your clock it's still daytime. In the last 2 hours before bed use warm evening, 2700K or lower. The warm/incandescent end of the scale.

Cool room. Your core temperature has to drop slightly to initiate and maintain sleep. A bedroom around 18°C (65°F) supports that. A hot bath or shower 1-2 hours before bed also helps, counterintuitively, by dilating blood vessels and dumping core heat afterward.

No
Alcohol close to bed. Alcohol is a sleep wrecker. It's sedating, so it feels like it helps, but it fragments sleep and suppresses REM, the stage tied to emotional processing and memory.

Last real meal 3+ hours before bed. Digesting a large meal raises core temperature and spikes insulin, both work against sleep onset.

No hard exercise in the 2-3 hours before bed. Training raises core temperature, heart rate, and adrenaline. Earlier in the day, exercise improves sleep, too close to bed it delays it.

A wind-down routine. The brain doesn't have an off switch, it needs a runway. Spend the last 30-60 minutes doing something low-stimulation and screen-free: reading, light stretching, music. Same routine nightly trains the association and helps you fall asleep.

1- Behavioural fixes if you're still struggling

Don't lie in bed awake. Lying in bed frustrated trains your brain to associate the bed with wakefulness. If you can't sleep after ~20 minutes, get up, do something boring and dimly lit, and return when sleepy. The bed is for sleep and sex, nothing else, no working, no scrolling.

Cut or move daytime naps. If you nap, you discharge adenosine, lowering the sleep pressure you need that night. If you have trouble falling asleep, drop afternoon naps entirely.

Remove the visible clock. Clock-watching at night creates anxiety that makes sleep harder. Turn it away or remove it.

Get the worry out of your head before bed. A racing mind is one of the most common reasons people can't fall asleep. Journaling, a written to-do list for tomorrow, or a brain-dump an hour before bed offloads the rumination.

Snoring, gasping awake, or unrefreshing sleep despite adequate hours can be sleep apnoea, and need a doctor's evaluation.

If you wake up in the middle of the night. Something is disrupting sleep architecture. The two usual culprits: a blood sugar dip (a light dinner can drop glucose mid-night and trigger a cortisol wake-up, a small protein/fat snack before bed helps), and substances, alcohol fragments the back half of the night, and GLP-1 drugs like
Retatrutide and semaglutide and AAS are commonly reported to disrupt sleep, especially while titrating up. If onset is fine but you can't stay down, look at your dinner and your compound list.

If you wake up too early and can't get back down. The cortisol rhythm that's supposed to peak around dawn starts firing too early, pulling you out of sleep before you're done. Supplements can’t out-muscle this, the fix is addressing the actual stress source: work, relationship, money, a mind that won't switch off.

2- Supplements

Magnesium, 200-400 mg elemental, glycinate form, 30-60 min before bed. Supports the GABA system (your main inhibitory, calming neurotransmitter) and is one of the most common subclinical deficiencies.

Glycine, 3 g before bed. An amino acid that lowers core body temperature, which is part of the sleep-onset signal. Evidence for improved sleep quality and faster sleep onset, and it doesn't leave grogginess.

L-Theanine, 100-400 mg before bed. Promotes calm without sedation by raising alpha brain-wave activity. Best for the "can't switch my mind off" type of sleep trouble. Pairs well with magnesium & glycine.

Ashwagandha (KSM-66 or Shoden), 300-600 mg. Lowers cortisol. Most useful if your sleep problem is stress-driven, high cortisol at night keeps you wired. Doubles as a stress tool.

Apigenin, ~50 mg before bed. A flavonoid (the calming compound in chamomile) that binds benzodiazepine sites on the GABA receptor for mild sedation. A gentler, lower-key option.

Melatonin, 0.5-1 mg, 1-2 hours before bed. Melatonin is not a sedative, it's a timing signal. It tells your clock "it's night," it doesn't knock you out. That makes it genuinely useful for circadian problems, jet lag, shift work, a drifted clock, and fairly weak for "I'm in bed and can't fall asleep." Most people massively overdose it, the common 5-10 mg pills are far above what the system uses. Start at 0.5 mg.

3- Prescription and peptides

Ramelteon is a prescription drug that acts on the same receptors as melatonin but more strongly and specifically. It's a timing/onset tool with low dependence potential, an option worth discussing with a doctor if melatonin doesn't work for you and the problem is sleep onset.

DSIP is a peptide reported to improve sleep quality and onset. The human evidence is thin and it sits outside standard approval frameworks, anecdote-driven.

Conventional prescription sleeping pills (Z-drugs like zolpidem, and benzodiazepines). The sedation they produce isn't natural sleep, they suppress deep and REM, so you log hours without the full restorative benefit. Tolerance, dependence, and rebound insomnia are all real. There’s widely-repeated "they give you cancer" claims, but it’s debated.