The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
10 to 12% I think is the ideal body fat for males. If you're too high, lose the weight, your testosterone will increase. And we see that in males who are super fat, they get on semiglutide, they lose the weight, the testosterone can actually go up. But if you go too far, you're going to tank your testosterone.
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In fact, there's research suggesting that every 1% increase in body fat, maybe above 15% body fat, decreases your testosterone 12 points. But when you go below 8% body fat, you're also tanking your testosterone.
In fact, there's research suggesting that every 1% increase in body fat, maybe above
Each 1% increase in body fat lowers total testosterone by 12 ng/dL (120 ng/dL for a 10% increase).
But in general, you know, guys who are, you know, like 12, like 12 to 15% body fatish will find that they have a increase in testosterone dramatically relative to when they were obese.