The Claim

In obese men with a median BMI of 42.7 kg/m², a 12-week very low calorie diet (800 kcal/day) significantly increases serum total testosterone concentrations from 6.97 nmol/l to 13.21 nmol/l, representing a clinically relevant improvement in androgen status.

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 a very low calorie diet for 12 weeks, their testosterone levels go up a lot, which can help improve their health.

See the scientific wording

In obese men with median BMI of 42.7 kg/m², a 12-week very low calorie diet (800 kcal/day) significantly increases serum total testosterone concentrations from 6.97 nmol/l to 13.21 nmol/l, which represents a clinically relevant improvement in androgen status.

What the research says

1 study

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

    The study used the exact same diet and group of people as the claim and found that testosterone levels went up a lot, just like the claim said.

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.

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