The Claim
Severe dietary zinc deficiency in rats for six weeks after weaning is associated with a 17.8-fold reduction in serum testosterone levels and complete absence of sperm (aspermia), indicating a profound disruption of testicular steroidogenesis and spermatogenesis.
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.
Rats deprived of zinc in their diet for six weeks after weaning show a 17.8-fold decrease in serum testosterone and no sperm production, indicating severe impairment of testosterone production and sperm development in the testes.
See the scientific wording
Severe dietary zinc deficiency in rats for six weeks after weaning is associated with a 17.8-fold reduction in serum testosterone levels and complete absence of sperm (aspermia), indicating a profound disruption of testicular steroidogenesis and spermatogenesis.
Without enough zinc, the cells that make testosterone in the testes cannot convert cholesterol into testosterone properly, so testosterone levels drop. This causes sperm production to stop completely because sperm need testosterone to develop.
What the research says
1 studyIn rats that didn't get enough zinc in their food for six weeks, their testosterone levels dropped dramatically and they stopped making sperm altogether — proving zinc is essential for making male hormones and sperm.
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.