The Claim
Over a 12-week period in healthy young male resistance-trained individuals, total testosterone increased and free testosterone decreased, and these changes occurred independently of creatine supplementation, indicating that seasonal variation or training adaptation are more influential factors than creatine on these hormone levels.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In healthy young men who lift weights, total testosterone rose and free testosterone fell over 12 weeks, regardless of whether they took creatine, suggesting that seasonal changes or training adaptations had a stronger effect on these hormones than creatine.
See the scientific wording
The increase in total testosterone and decrease in free testosterone observed over 12 weeks in healthy young male resistance-trained individuals occurred independently of creatine supplementation, suggesting seasonal variation or training adaptation may influence these hormones more than creatine.
After weeks of intense weight training, the brain adjusts how it controls testosterone production and how the body binds or removes it, causing total testosterone to rise while free testosterone drops because more of it sticks to proteins in the blood.
What the research says
1 studyStudy: Does creatine cause hair loss? A 12-week randomized controlled trial
The study found that whether guys took creatine or a fake pill, their testosterone levels changed the same way over 12 weeks—so creatine didn’t cause those changes. It was probably just because of their workouts or the time of year.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.