The Claim

Cortisol exhibits a circadian rhythm that must decrease in the evening to allow for melatonin synthesis and the initiation of sleep.

Source: Just 1 TSP Kills Cortisol & Makes You Sleep 8 Hours Straight

What the research says

Not yet evaluated

We are still looking at what the research says.

Supports

0score

Challenges

0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works

0 studies reviewed

In plain English

Your body's stress hormone, cortisol, needs to go down at night so your sleep hormone, melatonin, can rise and help you fall asleep.

See the scientific wording

Cortisol follows a circadian rhythm that must decline in the evening to permit melatonin synthesis and initiate sleep.

Score breakdown, mechanism chain, raw evidence, ideal studies needed

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.