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You might consider a B12 shot if you follow a vegetarian or vegan diet, since B12 comes mainly from animal foods
Pull the plunger back to the line that matches your dose, then press the needle through the stopper and push that same amount of air into the vial
Last reviewed: May 31, 2026 Last updated: May 31, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
The water-soluble vitamin injection is effective and has no adverse side effects
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