Research
Hormonal
Obesity-induced hypogonadism reduces testosterone and FSH levels, disrupting the blood-testis barrier and spermatogenesis.
Obesity alters your reproductive hormones by converting testosterone to estrogen, which lowers the testosterone needed for sperm production. Weight loss can help restore these hormone levels.
GoodSupportsHIGH confidence
In obese men, the hyperactivity of aromatase... causes excessive conversion of androgens into estrogens... The disruption of the negative feedback loop of the HPG axis finally leads to the significant decline in testosterone production.
Why this rating
Supported by multiple citations of clinical and animal studies.
Source
Obesity, a serious etiologic factor for male subfertility in modern society
Yue Liu et al. · Reproduction · 2017
DOI 10.1530/rep-17-0161
narrative_reviewCited 249×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Male obesity causes male subfertility through hormonal imbalance (hypogonadism), chronic inflammation, oxidative stress, and increased scrotal temperature, leading to reduced sperm quality and DNA damage.Good
- Obesity increases scrotal temperature due to increased scrotal adiposity, which reduces sperm motility and concentration and increases DNA damage.Good
- Obesity induces chronic inflammation and oxidative stress in the reproductive tract, damaging sperm DNA and membrane lipids.Good
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