Vitamin B12

Vitamins/Minerals · Evidence: Strong · Importance: High

Supports B12 status, nerve function, and red blood cell formation.

What the evidence says

Essential when dietary B12 is absent (vegan/vegetarian). Limited benefit otherwise.

Typical dose & timing

Dose: Varies widely by form.

Timing: Any time.

Role in a stack

Diet-specific coverage.

Redundancy check: Often included in multivitamins.

Cautions & safety

Usually well tolerated. Should not be used to mask fatigue without checking causes.

Essential for vegan/vegetarian users.

Best for

vegan diets · low animal product intake

Source-verified products

Real products in this category, ordered by review count. Each price and rating comes from the product's own page, recorded 2026-07-29 — follow the link for current values. Links go to the product's source page and never affect this ranking.

• Doctor's Best, Fully Active B12, 1,500 mcg, 180 Veggie Caps
  Doctor's Best · $15.99 · 4.7/5 (28652 ratings) · mid tier
• NOW Foods, Methyl B-12, 1,000 mcg, 100 Lozenges
  NOW Foods · $7.95 · 4.8/5 (26883 ratings) · budget tier
• Jarrow Formulas, Methyl B-12, Lemon, 1,000 mcg, 100 Chewable Tablets
  Jarrow Formulas · $11.92 · 4.8/5 (12435 ratings) · budget tier
• Life Extension, Vitamin B12, Methylcobalamin, 500 mcg, 100 Vegetarian Lozenges
  Life Extension · $6.75 · 4.8/5 (11026 ratings) · budget tier
• Natural Factors, B12, Methylcobalamin, 1,000 mcg, 90 Chewable Tablets
  Natural Factors · $10.47 · 4.8/5 (9814 ratings) · budget tier
• KAL, B-12 Methylcobalamin & Adenosylcobalamin, Mixed Berry, 2,000 mcg, 60 Micro Tablets
  KAL · $15.59 · 4.8/5 (3450 ratings) · mid tier
• Thorne, Vitamin B12 , 60 Capsules (1 mg per Capsule)
  Thorne · $24.00 · 4.8/5 (1997 ratings) · premium tier
• Methyl B12 Organic Spray
  MaryRuth Organics · $23.95 · 4.9/5 (1622 ratings) · premium tier
• Bluebonnet Nutrition, Liquid Methylcobalamin Vitamin B12, Raspberry, 2 fl oz (59 ml)
  Bluebonnet Nutrition · $19.96 · 4.9/5 (1217 ratings) · premium tier
• Methyl B12
  Zhou Nutrition · $17.09 · 4.9/5 (71 ratings) · premium tier
• Methyl B-12 (2000mcg)
  NutraBio · $16.99 · 4.9/5 (20 ratings) · mid tier
• Vitamin B-12
  Carlson · $13.50 · 5/5 (12 ratings) · mid tier

References

• Vitamin B12 deficiency in vegetarians. European Journal of Clinical Nutrition (2014)
  B12 deficiency is prevalent in vegans and vegetarians. Supplementation reliably corrects deficiency. Essential for anyone avoiding animal products.