The effect is very fast and strong. Within two minutes, my body turned into a mass of heat. It started with heat in the head and then went down to the face. It became red and the blood was flowing into it strongly until I felt that there was some numbness in it, and my lips were swollen from the excessive blood flow. Then the heat went down to the neck, hands and back and then went down to the legs. It is very terrible. You might be afraid. If you do not know how niacin works and the symptoms of its action, and you may get a tingling sensation and want to scratch and itch your skin. It is very effective for skin youth, skin diseases, and acne. It is excellent for the heart, arteries, and cholesterol. I recommend using it, but be careful. Reduce the dose, especially at the beginning of use, and do not take it in a high dose for a long time so that you do not get complications. Which can cause damage to the liver, while a low and non-continuous dose is excellent for fatty liver and stimulating the liver
