The Claim
In healthy adults aged 55–65, 16 weeks of multivitamin supplementation causes a mean reduction of 9.3% in homocysteine levels in men but has no significant effect on homocysteine levels in women, indicating a gender-specific causal effect on this biomarker of cardiovascular and cognitive risk.
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 men and women aged 55 to 65, taking a multivitamin for 16 weeks lowers homocysteine levels by 9.3% on average in men but does not lower homocysteine levels in women.
See the scientific wording
In healthy adults aged 55–65, 16 weeks of multivitamin supplementation significantly reduces homocysteine levels in men (mean reduction 9.3%) but not in women, indicating a gender-specific causal effect on this biomarker of cardiovascular and cognitive risk.
In men, daily multivitamin intake increases vitamin B6 and B12 levels, which activate enzymes that convert homocysteine into methionine and cysteine, lowering homocysteine in the blood. This effect does not occur in women because their bodies do not use these vitamins to reduce homocysteine at the same rate.
What the research says
1 studyIn older men, taking a daily multivitamin for 16 weeks lowered a blood marker linked to heart and brain health by about 9%, but women didn’t see this drop—exactly what the claim says.
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.