Vitamin B12 (Methylcobalamin)
Methylcobalamin
Active form of B12 directly usable as a methyl donor. Essential for homocysteine metabolism and neurological function.
Typical longevity dose: 1000-5000 mcg/day
Price Comparison
| Product | Vendor | Price | Per Serving | Trust | |
|---|---|---|---|---|---|
NOW Methyl B-12 5000mcg 5mcg · lozenge · 120 servings | Amazon⚠ | $11.99 | $0.10 | 2 | Buy |
NOW Methyl B-12 5000mcg 5mcg · lozenge · 120 servings | iHerb | $13.99 | $0.12 | 8 | Buy |
Jarrow Methyl B-12 5000mcg 5mcg · lozenge · 60 servings | Jarrow Formulas | $13.95 | $0.23 | 8 | Buy |
Thorne Methylcobalamin 1000mcg 1mcg · capsule · 60 servings | Thorne | $14.00 | $0.23 | 9 | Buy |
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Key Research
High-dose B vitamins slowed brain atrophy rate by 30% in elderly with mild cognitive impairment.
Smith AD, et al. (2010). PLoS ONE
Interaction Warnings
Metformin
Metformin reduces B12 absorption
Synergies
5-MTHF (Folate)
B12 and folate work together in methionine cycle
Disclaimer: This information is for educational purposes only and is not medical advice. Research citations are provided for reference — consult your healthcare provider before starting any supplement regimen. Prices are estimates and may not reflect current retail pricing.