The Claim

Men with type 2 diabetes mellitus have significantly lower total and free testosterone concentrations than age-matched healthy men, independent of body weight.

Source: Type 2 diabetes mellitus but not overweight/obesity reduces testicular volume and endocrine function in men

What the research says

Supports is higher

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

Supports
40score
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.

Correlation
1 study reviewed
In plain English

Men with type 2 diabetes have lower levels of total and free testosterone than men of the same age without diabetes, even when body weight is the same.

See the scientific wording

Men with type 2 diabetes mellitus have significantly lower total and free testosterone concentrations compared to age-matched healthy men, independent of body weight, suggesting a direct association between the metabolic condition and reduced sex hormone levels.

Why this might work

High blood sugar damages the testes, which reduces the production of testosterone by the cells that make it.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Type 2 diabetes mellitus but not overweight/obesity reduces testicular volume and endocrine function in men

    Men with type 2 diabetes had much lower testosterone levels than men without diabetes—even when they weighed the same—showing that diabetes itself, not just being overweight, is linked to lower testosterone.

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.