Best Supplements for Reduced Vitamin B12 Level
Ranked by research evidence. Compare 2 supplements across 7 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Low evidence5 studies
Across 5 studies, 4 found no significant difference in vitamin B12 levels between groups (neutral effect), while 1 study reported lower B12 levels in vitiligo patients (beneficial effect with moderate size). Effect sizes were predominantly small. Studies focused on clinical populations including patients with phenylketonuria, vitiligo, bariatric surgery, fibromyalgia, and periodontitis.
2 supplements
- LowVitamin B12Across 5 studies, 4 found no significant difference in vitamin B12 levels between groups (neutral effect), while 1 study reported lower B12 levels in vitiligo patients (beneficial effect with moderate size). Effect sizes were predominantly small. Studies focused on clinical populations including patients with phenylketonuria, vitiligo, bariatric surgery, fibromyalgia, and periodontitis.1 beneficial4 neutral5 studies