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Strengthened Immune Function: Contributes to healthy immune system responses

Conversely, some studies show that a deficiency in vitamin B12 may cause appetite loss, potentially leading to weight loss if left untreated ( If youre low or deficient in B12, your healthcare provider will likely recommend oral vitamin B12 supplements or injections to increase your blood levels ( summary Low levels of vitamin B12 can cause megaloblastic anemia, which is characterized by shortness of breath, headaches, and fatigue

This substance affects everyone differently, and even a small amount in your system can have serious side effects, depending on your bodys response, weight, sex, and whether there was food in your stomach when you drank the alcohol

Some cancer treatments can harm the gut, making it hard to absorb B12