Niacin or nicotinic acid consists of vitamin B3 which is indispensible for the proper function of gastrointestinal tract and nervous system. Niacin deficiency takes place when a person’s intake of vitamin B3 is terribly low.
Some people who pass through a bout of certain medical condition fail to absorb niacin due to their particular health condition.
These people are also vulnerable to niacin deficiency. Main role of niacin is to metabolize proteins and fats, convert carbohydrates into glucose, allow the nervous system to function properly, improve cholesterol level and blood circulation level and help produce sex hormones in the body.