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Hooshmand B et al., Neurology 2010 B12 status and brain volume in elderly

For some people, the best way to achieve this is by using an oral B12 supplement

The increased NAD+ availability activates SIRT1, a protein that plays a crucial role in regulating how your body handles blood sugar

Hypotension (low blood pressure), especially under anesthesia

Best overall vitamin B12 supplement Form: Capsule | Type of vitamin B12: Methylcobalamin | Dose: 1 capsule up to 3 times per day | % of Daily Value (DV) per serving: 41,667% Thorne Vitamin B12 is manufactured in third-party certified, U.S.-based facilities and is rigorously tested multiple times throughout manufacturing to ensure purity, potency and quality