Safety Warning: Add to water phase of formula or directly into a finished cream or cream base. Typical use level is 1-6 %, with 5% being a typical and effective concentration. For external use only. Avoid adding to an acidic product, ideal final pH of product should be 6. Should not be combined with l-asorbic acid. It can hydrolyze and form nicotinic acid at higher or lower pH, which can result in skin irritation. For external use only.
