Phloretin has an orange color appearance which should not be mistaken for oxidation. The Phloretin ingredient is a pink micro-crystal powder. Ferulic Acid is a yellow fluffy powder. When 2.0% pink Phloretin powder is mixed with 0.5% yellow powder, this produces an orange-colored mixture. This is the correct color for Phloretin, which should not be mistaken for an oxidized Vitamin C.
This product is recommended for storage in the refrigerator at 40 degrees F to optimize the freshness, efficacy, and to prolong the shelf-life.