The Claim
In healthy elderly individuals with mildly elevated homocysteine (≥15 μmol/L), vitamin B12 and folate supplementation lowers homocysteine levels even in the absence of clinical deficiency (B12 ≤27%, folate ≤13%).
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 older adults with slightly high homocysteine levels, taking vitamin B12 and folate supplements reduces homocysteine even when blood tests show no deficiency.
See the scientific wording
In healthy elderly individuals with mildly elevated homocysteine (≥15 μmol/L), a low prevalence of clinical vitamin B12 or folate deficiency (≤27% for B12, ≤13% for folate) does not preclude a significant homocysteine-lowering response to supplementation, suggesting that optimal vitamin status may extend beyond deficiency thresholds.
When vitamin B12 and folate are present in higher amounts, they work together to convert homocysteine into methionine, which lowers the amount of homocysteine in the blood. This happens even when vitamin levels are not low enough to be called deficient, because the enzymes that do this job work better with more of these vitamins.
What the research says
1 studyEven if older adults aren’t officially deficient in B vitamins, taking a daily B12 and folic acid supplement still lowers their homocysteine levels — meaning the usual 'normal' levels might not be good enough to protect their heart and brain.
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.