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Vitamin B3 for Heart Health

What is vitamin B3?
Vitamin B3, also known as niacin, is actually made up of niacin (nicotinic acid) and niacinamide. It is a water-soluble nutrient that is part of the B vitamin family. B vitamins help to support adrenal function, to calm and maintain a healthy nervous system, and are necessary for key metabolic processes. Niacin is essential for the metabolism of carbohydrates and fats.

Why is vitamin B3 necessary?
Niacin’s reduces the risk of heart disease and lowers harmful cholesterol while raising good cholesterol. Niacin may also reduce the incidence of asthma-induced wheezing, and may be helpful in treating or preventing atherosclerosis, second heart attacks, Alzheimer’s disease and osteoarthritis.

What are the signs of a deficiency?
Pellagra is a nutritional disease that develops due to insufficient dietary amounts of vitamin B3. Symptoms of pellagra include skin disease, diarrhea, dementia and depression.

How much, and what kind, does an adult need?
According to the National Institutes of Health (NIH), the U.S. Recommended Daily Allowance (RDA) for adults is between 16 and 18 mg daily, with a maximum intake of 35 mg daily. It is recommended that pregnant or breastfeeding women avoid supplemental niacin. Dr. Weil recommends taking 50 mg of B3 as niacinamide as part of a B-complex that contains a full spectrum of B vitamins, including thiamin, B12 and riboflavin.

How much does a child need?
According to the NIH, not enough scientific evidence is available to recommend the safe use of supplemental niacin or niacinamide in children. Dr. Weil recommends 20 mg (as niacinimide) as part of a daily children’s multivitamin, but you should always consult with your pediatrician before beginning any supplement.

How do you get enough vitamin B3 from foods?
Salmon and tuna, eggs, leafy vegetables, broccoli, tomatoes, carrots, sweet potatoes, avocados, nuts, whole grains, legumes and mushrooms are good dietary sources.

Are there any risks associated with too much vitamin B3?
It is difficult to get too much niacin from food sources, but you can get too much niacin when supplementing. Reactions range from flushing, itching, nervousness and headaches to intestinal cramps, nausea, and diarrhea. High doses of niacin can cause liver toxicity; doses in excess of 3 grams a day should be used only under careful medical supervision (for example, in the treatment of high cholesterol). Gout, abnormal heart rhythms and worsening of stomach ulcers have also been reported with very high doses of supplemental vitamin B3.


Are you getting the supplements you need?
Everyone’s dietary needs are different based on a number of factors including lifestyle, diet, medications and more. To find out which supplements are right for you, take the Weil Vitamin Advisor. This 3-step questionnaire requires just minutes to complete, and generates a free, no-obligation vitamin and nutritional supplement recommendation that is personalized to meet your unique nutritional needs.