Best Supplements for Reduced Vitamin B12 Level
Ranked by research evidence. Compare 2 supplements across 8 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Low evidence6 studies
Across 6 studies, the evidence is predominantly neutral (5 studies) with one beneficial finding showing a moderate effect. The single beneficial study reported lower vitamin B12 levels in vitiligo patients compared to controls (mean difference -0.951, p<0.05). Most studies focused on clinical populations (PKU, vitiligo, bariatric surgery, fibromyalgia, celiac disease, periodontitis) with no consistent dose or duration data available. Effect sizes were mostly small and not statistically significant.
2 supplements
- LowVitamin B12Across 6 studies, the evidence is predominantly neutral (5 studies) with one beneficial finding showing a moderate effect. The single beneficial study reported lower vitamin B12 levels in vitiligo patients compared to controls (mean difference -0.951, p<0.05). Most studies focused on clinical populations (PKU, vitiligo, bariatric surgery, fibromyalgia, celiac disease, periodontitis) with no consistent dose or duration data available. Effect sizes were mostly small and not statistically significant.1 beneficial5 neutral6 studies