Nicotinamide

Nicotinamide, also known as niacinamide, is a form of vitamin B3 (niacin) essential for energy production, DNA repair, and cell signaling. Unlike nicotinic acid (the other form of B3), nicotinamide does not cause flushing. Your body obtains nicotinamide from foods like chicken, tuna, and mushrooms, or synthesizes it from tryptophan. Low levels are rare in developed countries but can occur with severe malnutrition, certain medications, or genetic disorders affecting niacin metabolism. This test helps assess nutritional status and may be useful in evaluating fatigue or neurological symptoms.