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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, even when sleeping enough hours, disrupts our internal clock (which regulates cortisol and melatonin) and generates fatigue.

holds up

This assertion is based on solid scientific foundations regarding chronobiology. The SHADES observational study (conducted by Michael Grandner's team) indeed shows that shifting…

noli's read

This assertion is based on solid scientific foundations regarding chronobiology. The SHADES observational study (conducted by Michael Grandner's team) indeed shows that shifting the internal clock, or 'social jetlag,' is directly linked to increased fatigue, regardless of the total number of hours of sleep. Furthermore, clinical work conducted by Kenneth Wright's team confirms that circadian desynchronization disrupts the natural secretion of melatonin and cortisol. Nevertheless, research qualifies this observation based on the individual biological profile known as chronotype. For a person who is naturally a 'night owl,' sleeping on a shifted but regular schedule does not necessarily induce fatigue. It is primarily the irregularity of the rhythm and the misalignment with natural light cycles that cause this lack of energy.

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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