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Vitamin B12 is an essential vitamin that is involved in many of the body's functions. Deficiencies in vitamin B12 can occur mainly in vegans and vegetarians, as it is found in foods of animal origin such as meat and fish. Vitamin B12 plays an important role in the proper functioning of the immune system. Biocyte's vitamin B12 food supplement helps to fill this gap. It helps to reduce fatigue and support the immune system thanks to a dose of 500 μg of vitamin B12 in each capsule.