The Claim
Serum vitamin B12 concentrations between 400–600 pmol/L are associated with a 34% higher risk of all-cause mortality compared to serum vitamin B12 concentrations below 400 pmol/L, indicating a graded increase in risk even within the range below the commonly recognized threshold of >600 pmol/L.
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.
People with vitamin B12 levels between 400 and 600 units in their blood are 34% more likely to die from any cause than people with lower levels—even though those levels are still considered normal by doctors.
See the scientific wording
Serum vitamin B12 concentrations between 400–600 pmol/L are associated with a 34% higher risk of all-cause mortality compared to lower levels, indicating a graded risk increase even below the >600 pmol/L threshold.
What the research says
1 studyThis study found that people with B12 levels between 400 and 600 pmol/L had a 34% higher chance of dying from any cause compared to those with lower levels, which is 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.