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This extended supply allows researchers to see long-term body adaptations and sustained effects that shorter protocols might miss

Yap YS, Kwok LL, Syn N, Chay WY, Chia JWK, Tham CK, et al

[81:41] Andrew Huberman It's not very sexy

Some reasons your body may not be able to get enough B12 from food include: Anemia Gastritis Crohns disease Celiac disease Alcohol use disorder Sjgrens syndrome Weight loss surgery, or surgery that removes part or all of your stomach A vegan or strict vegetarian diet (as B12 is only found in animal products) Medications, such as metformin and drugs used to treat gastroesophageal reflux disease (GERD), indigestion, and stomach ulcers Pregnancy Your doctor could also order a B12 test based on your symptoms

Dec 23, 2025 You've tried cutting calories

Separate vials, same session