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Primary Handling Editor: Sonia Muliyil, in collaboration with the Nature Medicine team

Having digestive disorders like Chrons disease and celiac disease and drinking too much alcohol might impair vitamin B12 absorption leading to its deficiency

Sources of Vitamin B12 Vitamin B12 is naturally found in animal-based foods, making it a challenge for vegetarians and vegans to obtain adequate amounts through diet alone

I am working out and trying to lose weight, and I can definitely tell a difference in the way my clothes fit and in my energy and strength during my workouts

When shopping for a B12 supplement, be sure to choose a product thats appropriate for your dietary needs and preferences

This makes injections the superior choice for optimal effectiveness in these scenarios