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For example, vitamin D promotes strong bones and immunity, vitamin C boosts skin health and healing, and B vitamins support energy and brain function
It said: International reports link it to fatal overdose and contamination
Vitamin B12 is an essential nutrient that helps the body convert food into usable energy and supports healthy nerve and blood cells
In the blood stream as nicotinic acid, it can cause skin flush and this reaction is actually responsible for the tolerable upper limit (UL) for niacin at 35 mg/d for adults in US (20)
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