When using for the first time, open the sachet with a pair of scissors and carefully pour the powder into the bottle to activate the product. Shake for 20-30 seconds and leave to rest for 2 minutes to solubilize. Apply a few pumps to cleansed skin. Apply morning and evening. Keep away from heat and sunlight. One-month efficacy after first opening.
To optimize the efficacy of vitamin C, store the booster in a cold dark place, ideally in the refrigerator at a temperature of 4-5Â° C / 40F.