Observational study: Alcohol intake not associated with semen quality, but positively associated with total and free testosterone
https://www.ncbi.nlm.nih.gov/pubmed/24893607
Note: Alcohol intake across particiapants was generally low/moderate (so the study can't automatically be generalised to individuals with high intakes)
- Direction of causation is unclear. Could it be that high testosterone men are more likely to drink alcohol?
- Alcohol intake was not significantly associated with serum inhibin B, FSH or LH levels in either group of men.
Observational study: Alcohol intake is associated with poorer semen quality, but positively associated with total and free testosteron
https://www.ncbi.nlm.nih.gov/pubmed/25277121
Meta-analysis: https://www.ncbi.nlm.nih.gov/pubmed/28029592
https://www.ncbi.nlm.nih.gov/pubmed/22732148
In vitro study: Alcohol supresses LH release
https://www.ncbi.nlm.nih.gov/pubmed/7724577