One vitamin that opens blood vessels and improves circulation (Page 5 ) | November 1, 2025

To treat high cholesterol with nicotinic acid, it’s really important to do it under a doctor’s supervision. You usually start with 250 mg per day and slowly increase it to 1000 to 2000 mg per day, depending on how well you tolerate it and how your body responds.

Be wary of high doses of vitamin B3 as it can result in side effects like flushing, itching, and in more serious cases, liver damage. That’s why it’s essential to have a doctor guide you if you’re taking supplements.