Niacin, also known as vitamin B3, niacinamide, nicotinic acid and nicotinamide, is a water-soluble vitamin and member of the B-complex family of vitamins that is found in many foods. You can also take niacin in supplement form for help in reducing cholesterol and triglyceride levels in the blood, metabolizing fats and reducing blood pressure. However, as with most things, too much of anything can have detrimental side effects on the body, and overindulging in niacin supplements is not different. The recommended dose of niacin, according to the USDA, is 13 to 19 mg a day for adults.
Flushing
Individuals who take more than 75mg of niacin on a daily basis often experience flushing, caused by blood vessel dilation. The flushed appearance may last up to 30 minutes for some people. The amount of niacin that instigates flushing might vary according to individual weight, overall health condition and the duration for which you've taken niacin supplements. Some people experience the flushing after ingestion of 50mg, while others might not experience the flushing until 100 mg or more has been ingested.
Itching
Itching is a common side effect of niacin supplement use, but it is not considered to be harmful. Itching may or may not be accompanied by a rash. Some individuals experience dry patches of skin or skin that feels rough and scaly to the touch.
Gastrointestinal Upset
Individuals who take higher-than-recommended doses of niacin often experience upset stomach, nausea, bloating and gas. Some people vomit and experience varying degrees of diarrhea. A more serious side effect of too much niacin supplement use is a drop in blood pressure, which occurs suddenly and can cause dizziness or fainting.
Long-Term Effects
Prolonged use of niacin supplements taken over the recommended dosage may increase risk of vision disturbances, jaundice and liver disorders.
Member Comments