High doses can cause side effects, and very high doses may lead to nausea, vomiting, liver damage, easy bruising, or increased bleeding. For this reason, it is better to get niacin from food unless a healthcare professional recommends a supplement.
2. Vitamin C
Vitamin C is one of the most important vitamins for blood vessel support. Your body needs vitamin C to make collagen, a protein that helps maintain skin, connective tissue, and blood vessel structure. The NIH explains that vitamin C is required for collagen production and also works
