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Vitamin B12 deficiency anemia happens when your body doesnt have enough healthy red blood cells

A deficiency in this vitamin isnt common, but being a vegan or vegetarian can put you at a higher risk of deficiency because plant-based diets contain very little, if any, B12

Improved metabolism

A study conducted on pregnant mice, the species with a very similar biological and behavioral makeup to humans, also found that B12 deficiency led to high cholesterol levels and a significant increase in body fat percentage in pregnant mice

People searching for how quickly B12 helps with weight are usually hoping for a magic switch, but the honest answer is that it works best as one supportive piece of a broader plan