Association between dietary creatine intake and serum biomarkers of spermatogenesis in males aged 12 years and older.
Level 4 - case-series / case-control
Cross-sectional observational study using existing population survey data.
PubMed 40859883 · doi:10.1530/RAF-25-0009
What was done
Researchers analyzed existing dataset records from more than 1,300 U.S. males aged 12 years and older to evaluate the relationship between estimated dietary creatine intake and serum levels of two hormones involved in spermatogenesis.
What was found
The abstract reports no strong link between dietary creatine intake and the measured serum hormone biomarkers of sperm production. No specific numerical values, effect sizes, or confidence intervals are reported in the abstract.
Why it matters
These findings suggest that normal dietary intake of creatine is unlikely to exert a major beneficial or harmful effect on endocrine markers of male reproductive function.
Limits
The study is observational and cross-sectional, precluding causal inference. It relied on existing data rather than an experimental intervention, examined dietary intake rather than supplementation, evaluated surrogate hormone markers rather than direct semen parameters (such as sperm count or motility), and the abstract omits exact statistical figures.
Cited by
- supports Research by Sergej Ostojic shows creatine supplementation does not downregulate sperm production and instead improves sperm vitality and motility.