Each bottle contains 240 capsules of high quality 500mg of Niacin at an unbeatable price. Nutricost strives to provide the best supplements at the best prices. Please be aware that taking high dosages of Vitamin B3 (Niacin), especially when your body is not used to it, can lead to what is often referred to as the Niacin flush. A "niacin flush" is a temporary side effect of taking niacin; it's also a protocol used by some physicians to lower lipid profiles and boost heart health. Studies have shown that niacin flush has a lot of benefits. However, if you are looking for just the benefits of vitamin b3 without the flush, we'd recommend using a different form of Vitamin b3 such as Niacinamide. The way niacin works is by mobilizing fat cells to release toxins into the blood where they can be removed by the body. The dosage of these capsules is intended to cause this effect for most people. Niacin causes your blood vessels to dilate and creates a sensation of warmth. This is a sign the detoxification effect of niacin is at its peak and will be most effective.