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True B12 deficiency can show up as increased shedding, brittle hair, slow regrowth, and pale or inflamed skin especially in vegans, older adults, and people on certain medications
For example, people who follow vegetarian or vegan diets may have a higher risk of B12 deficiency because the vitamin is not naturally present in plant-based foods
SIDE EFFECTS: Generally very safe, in rare cases upset stomach, headaches, depression or urinary difficulties
Holding the needle parallel to the body, carefully insert the needle into the skin and inject the B12
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