The Claim
A daily supplement of 400 μg folic acid and 100 μg vitamin B12 significantly improves serum cobalamin, holo-transcobalamin, and red blood cell folate levels in healthy elderly individuals over 12 weeks, even in those without clinical deficiency.
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.
Taking a daily supplement containing 400 micrograms of folic acid and 100 micrograms of vitamin B12 for 12 weeks increases levels of vitamin B12 and folate in the blood of healthy older adults, even if they were not deficient before.
See the scientific wording
A daily supplement of 400 μg folic acid and 100 μg vitamin B12 significantly improves serum cobalamin, holo-transcobalamin, and red blood cell folate levels in healthy elderly individuals over 12 weeks, even in those without clinical deficiency, indicating that supplementation can enhance vitamin B status beyond correcting deficiency.
Taking folic acid and vitamin B12 supplements increases the amount of active forms of these vitamins in the blood, which allows a key enzyme to work faster at converting homocysteine into methionine. This process uses up more folate and B12, so the body stores more of them in red blood cells and keeps more B12 in its active form in the blood.
What the research says
1 studyEven if older adults aren't deficient in these vitamins, taking a daily pill with folic acid and B12 for 12 weeks still boosts their blood levels of these nutrients — proving the supplement works beyond just fixing a shortage.
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.