Dilute one-half teaspoon of the powder with 10 drops of an ELAINE PERINE serum or water in the palm of your hand and mix. Avoid the mouth and eye area. A tingling effect may occur at the beginning of the application. Once the skin has become accustomed to it, the application can be slowly increased to once a day. Always mix freshly. To begin, test the mixture on a clean area of skin on the inside of the upper forearm and wait at least 24 hours. Wash hands after application. Warning: do not combine with vitamin C or niacinamide enriched products or AHA/BHA peels. Has a brightening effect. Do not apply to sensitive or irritated skin. In case of intolerance, stop using the product. Seek medical advice if irritation persists. Use niacinamide powder only according to intended use. Not for consumption. Avoid direct skin contact and use only diluted. Avoid eye contact. In case of eye contact, rinse thoroughly with water. Do not inhale powder. Always close container tightly. Store in a cool, dry and dark place. Keep out of the reach of children.