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Carla Valette@carla.valetteTikTok

Le sommeil n’est pas seulement une question de quantité #sommeil #sante

original sound — @carla.valette

what it claims

Going to bed very late shifts our circadian rhythm (melatonin and cortisol), which promotes daytime fatigue, even if the total sleep duration is sufficient.

holds up

Research in chronobiology largely validates this concept, often referred to as 'social jetlag.' Observational studies conducted by researchers such as Till Roenneberg show that…

noli's read

Research in chronobiology largely validates this concept, often referred to as 'social jetlag.' Observational studies conducted by researchers such as Till Roenneberg show that shifting bedtimes misaligns our internal clock with natural light cues. This shift effectively disrupts the release of melatonin (which prepares the body for rest) and cortisol (which supports morning energy). Observational work and controlled laboratory trials indicate that such desynchronization leads to an increase in daytime fatigue, even if the raw duration of sleep is maintained. However, sensitivity to this phenomenon depends on individual profiles: evening chronotypes tolerate late bedtimes better, provided that a stable routine is maintained. The idea that the timing of sleep matters as much as the raw quantity of sleep is therefore based on solid scientific foundations.

the sources

Claimed by Carla Valette. Noli grades the claim, never the person.

Decoded by Noli · July 13, 2026 · the original post

What the graded evidence says

Evidence: B+

Linked to, not proven to cause.

Effect: all-cause mortality by Sleep Regularity Index quintile (UK Biobank, n=60,977) — 20-48% lower all-cause mortality in the top four SRI quintiles vs the least regular quintile; regularity a stronger predictor than duration
Measured on: middle-aged and older adults (mean ~63 y); social jetlag evidence spans younger adults

The mortality link is from cohort data (associational), so other healthy habits of regular sleepers could contribute. The takeaway — keep timing consistent — is safe and low-cost regardless.

Carla Valette in the Register86 claims graded · solidity 88/100See their record →

More from Carla Valette

Excessive use of active ingredients (acids, retinoids) damages the skin's protective barrier, causing blemishes and redness often mistaken for hormonal acne. To restore clear skin, it is necessary to suspend these actives and apply soothing and repairing ingredients such as niacinamide, centella asiatica, panthenol, and ceramides.

mixedCarla Valette

Protecting your ears from excessive noise helps preserve your non-regenerative auditory cells, which assists in maintaining mental sharpness and preserving memory over the long term.

holds upCarla Valette

Wear hearing protection in very noisy environments, such as concerts, to avoid irreversible damage to the inner ear and thereby reduce the long-term risk of cognitive decline and dementia.

holds upCarla Valette

Others on this

Each 'sin' would correspond to a behavior that damages health (metabolism, stress hormones, inflammation), and its opposite (moderation, gratitude, generosity, discipline) to a behavior that supports it.

not provenzevinclark

It's not just "anxiety" but a nervous system stuck on alert — cortisol supposedly tightens the chest and shortens the breath; regulating the nervous system (not just "calming down") would quickly undo that.

mixedJenna

Dance, move, and shake your body to discharge built-up stress — like a gazelle that trembles for a minute or two after escaping a lion and then goes right back to grazing with no residual stress — and this self-regulation supposedly becomes "contagious," regulating your child's nervous system too.

Noli has read similar claims

Other advice in the Register that leans on the same research.

To overcome the 'tired but wired' phenomenon, adopt a consistent and calm bedtime routine at regular hours (low light, soothing sounds, reduced screen time) to regulate your circadian rhythm and signal to your body that it is safe to fall asleep.

holds upDoctor Mike

Going to bed 1 to 2 hours later than usual is enough to completely eliminate the nocturnal growth hormone spike, regardless of total sleep duration; sleep consistency is therefore reportedly as crucial as duration.

mixedAndrew Huberman, Ph.D.

To optimize health, it is recommended to turn off screens 60 minutes before bedtime, have your last meal 4 hours before sleeping, and go to bed at a fixed time every evening.

holds upBryan Johnson

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