Human reproduction update2026n = 32 studies included
Meta AnalysisHuman
This study set out to review how different weight loss methods affect male fertility in men with obesity. It looked at 32 studies that compared lifestyle changes, medications, and bariatric…
Advances in nutrition (Bethesda, Md.)2025n = 2,558 individuals across 11 studies
Meta AnalysisHuman
This study set out to see if sticking to a Mediterranean diet (MedDiet) is linked to better sperm quality and fertility outcomes in men. It pooled data from 11 studies,…
Andrology2024n = 1,774 participants across 44 studies
Meta AnalysisHuman
This meta-analysis set out to measure how much testosterone men with obesity get back when they lose weight, comparing low-calorie diets with bariatric surgery. It pooled 44 studies covering 1,774…
The Journal of steroid biochemistry and molecular biology2021n = 206
Meta AnalysisHuman
This study set out to see what happens to a man's testosterone when he cuts fat out of his diet, at a time when levels have been falling across Western…
European journal of endocrinology2013n = 24 studies
Meta AnalysisHuman
This study set out to see how losing weight affects testosterone in men with obesity. It pooled 24 trials comparing low-calorie diets against bariatric surgery, measuring changes in total testosterone…