Vitamin C 10% Water, Ascorbic Acid, Mannitol, Sodium Hydroxide, Phenoxyethanol, Ethylhexylglycerin. Directions: Apply a few drops of the serum to cleansed face, neck and décolleté morning and night before your cream. SPF 50 should be used after your serum if applied in the morning. Precautions: Avoid contact with eyes. If skin irritation occurs discontinue use and consult a physician. Use is strictly on healthy, intact skin. A patch test is recommended before use. Keep out of reach of children. Patch Test: Patch tests are an easy way to predict whether you may experience a negative initial reaction to a new product. A patch test is recommended before incorporating any new product into your regimen. Here's a general method for performing your own test depending on the type of product: Apply a small amount of the product to a clean area of ​​skin on the top of your forearm. If the product has a specified wear time, rinse off after this time. Otherwise, rinse off after 24 hours. If redness, burning, itching, blistering, or irritation is observed at any time during the test, do not use the product.