The Claim
In middle-aged and older men, obesity defined by waist circumference greater than 102 cm is strongly associated with low testosterone levels (below 300 ng/dL), with the prevalence of low testosterone increasing from 8% in men with waist circumference ≤93 cm to 44% in men with waist circumference ≥110 cm.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Men aged middle age and older with a waist circumference over 102 cm have a higher rate of low testosterone levels than men with smaller waists, with the rate rising from 8% to 44% as waist size increases from 93 cm to 110 cm.
See the scientific wording
In middle-aged and older men, obesity, defined by waist circumference greater than 102 cm, is strongly associated with low testosterone levels (below 300 ng/dL), with prevalence increasing from 8% in men with waist circumference ≤93 cm to 44% in those with waist circumference ≥110 cm, suggesting that adiposity may be a more significant factor than age in determining testosterone status.
Excess fat around the waist produces an enzyme that converts testosterone into estrogen, which tells the testes to make less testosterone, leading to low levels in the blood.
What the research says
1 studyStudy: RETHINKING LOW TESTOSTERONE IN OLDER MEN: ASSOCIATION WITH OBESITY RATHER THAN AGING.
In older men, having a big waist is much more likely to mean low testosterone than just getting older — men with a waist over 110 cm are more than five times as likely to have low testosterone as those with a waist under 93 cm.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.