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Conditions like pernicious anaemia (an autoimmune disorder where your body cant absorb B12 from food), certain stomach conditions, medications that reduce stomach acid, or even gastrointestinal surgeries (like weight loss surgery) can prevent your body from properly taking in B12, even if youre getting enough in your diet

Swirl gently (never shake) until the solution is clear and colorless

Anti-aging and longevity research : Elevated NAD availability is associated with reduced age-related cellular decline and improved muscle stem cell regenerative capacity

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There are a number of risk factors for vitamin B 12 deficiency, including prolonged use of metformin and proton pump inhibitors