The Claim
Serum vitamin B12 levels below 190 pg/mL and above 948 pg/mL are both associated with increased all-cause and cardiovascular disease mortality, with optimal risk occurring between 190 and 948 pg/mL.
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.
If your blood has too little or too much vitamin B12, you might be at higher risk of dying from any cause or from heart disease — the safest range is in the middle, between 190 and 948 pg/mL.
See the scientific wording
Serum vitamin B12 levels below 190 pg/mL and above 948 pg/mL are both associated with increased all-cause and cardiovascular disease mortality, with optimal risk occurring between 190 and 948 pg/mL.
What the research says
2 studiesThis study found that people with type 2 diabetes who have either very low or very high levels of vitamin B12 are more likely to die from heart disease or other causes, which matches the claim that both too little and too much B12 can be harmful.
Related videos
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.