The Claim

In obese men, caloric restriction significantly increases sex hormone-binding globulin (SHBG) concentrations from 22.11 nmol/l to 42.12 nmol/l, which affects testosterone bioavailability and metabolism.

Source: Caloric Restriction Increases Serum Testosterone Concentrations in Obese Male Subjects by Two Distinct Mechanisms

What the research says

Supports is higher

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

Supports
31score
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.

Cause and effect
1 study reviewed
In plain English

When overweight men eat fewer calories, it raises a protein in their blood that changes how their body uses testosterone, which can impact things like energy and health.

See the scientific wording

In obese men, caloric restriction significantly increases sex hormone-binding globulin (SHBG) concentrations from 22.11 nmol/l to 42.12 nmol/l, which affects testosterone bioavailability and metabolism.

What the research says

1 study

  1. Study: Caloric Restriction Increases Serum Testosterone Concentrations in Obese Male Subjects by Two Distinct Mechanisms

    The study shows that when obese men cut calories, their SHBG levels go up a lot, just like the claim says. This helps explain how their testosterone works better.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 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.