The Claim

Suppressing the natural early morning peak in cortisol levels interferes with the regulation of the circadian rhythm.

Source: This Plant Increased Testosterone 37% and Dropped Cortisol 16%

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
28score
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
2 studies reviewed
In plain English

When cortisol levels are artificially lowered during their natural morning peak, the body's internal clock becomes disrupted.

See the scientific wording

Cortisol levels naturally peak in the early morning, and suppressing cortisol during this peak may interfere with normal circadian rhythm regulation.

Why this might work

When cortisol levels are blocked in the early morning, the body loses a key signal that tells other hormones when to rise or fall during the day, causing their daily patterns to become irregular.

Verified mechanismbased on 2 studies

What the research says

2 studies
  1. Study: The Effects of Single-Dose Etomidate Versus Propofol on Cortisol Levels in Pediatric Patients Undergoing Urologic Surgery: A Randomized Controlled Trial

    This study showed that a certain drug made kids' cortisol levels drop when they should naturally be high in the morning. Even though the kids felt fine, their body’s natural morning hormone surge was blocked — which suggests messing with this timing could confuse the body’s internal clock.

  2. Study: Inhibition of the morning cortisol peak abolishes the expected morning decrease in serum osteocalcin in normal males: evidence of a controlling effect of serum cortisol on the circadian rhythm in serum osteocalcin.

    When scientists blocked the body’s natural morning cortisol spike, a related hormone called osteocalcin didn’t drop as it normally does, which means the body’s daily rhythm got messed up. So, lowering cortisol in the morning disrupts the body’s internal clock.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies

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.