The Claim
Daily supplementation with 5 mg of folic acid and 30 mg of elemental zinc increases the incidence of gastrointestinal symptoms such as abdominal discomfort, nausea, and vomiting in men undergoing infertility treatment compared to placebo.
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.
Men taking daily supplements of 5 mg folic acid and 30 mg zinc during infertility treatment experience more abdominal discomfort, nausea, and vomiting than men taking a placebo.
See the scientific wording
Daily supplementation with 5 mg of folic acid and 30 mg of elemental zinc increases the incidence of gastrointestinal symptoms such as abdominal discomfort, nausea, and vomiting in men undergoing infertility treatment compared to placebo.
High doses of zinc irritate the stomach lining, causing inflammation and discomfort. Folic acid at this dose overwhelms the gut's ability to process it, leading to unabsorbed folate building up and disrupting the gut lining. Together, this triggers nerve signals from the stomach to the brain that cause nausea and vomiting.
What the research says
1 studyThe study found that men who took folic acid and zinc pills every day had more stomach pain, nausea, and vomiting than men who took dummy pills — so yes, the supplement made them feel worse in the stomach.
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.