Vitamins - B12 - Source

B₁₂ is derived mainly from animal products, including cheese, clams, fish, beef liver, lamb liver, milk products, and organ meats.

Vegetarians can obtain B₁₂ from various sea vegetables, including dulse, kelp, kombu and nori. Spirulina/blue-green algae is an excellent source of B₁₂. This vitamin can also be found in brewer's yeast and enriched soy products, e.g., soy milk. B₁₂ is rare in most vegetables and is not found in fruit.