Brightening, Whitening and Anti-Aging Vitamin C Serum

Core ingredients: L-vitamin C, vitamin C derivatives. Directly participate in the antioxidant reaction, neutralize free radicals; inhibit tyrosinase activity, block melanin production; promote collagen synthesis, and enhance skin elasticity.
Auxiliary whitening ingredients:
Niacinamide: inhibit melanin transport, accelerate stratum corneum metabolism, and synergistically brighten the skin.
Stability auxiliary ingredients:
Vitamin E: synergistic antioxidant, protect vitamin C from oxidation and inactivation.
Core efficacy
Whitening and brightening: inhibit melanin production from the source, reduce spots, dullness, acne marks, long-term use can make the skin color more even and translucent, improve "yellow gas" and uneven skin color problems.
Antioxidant and anti-aging: remove free radicals, delay skin aging (such as fine lines, roughness); promote collagen regeneration, enhance skin elasticity, improve sagging and dry lines, and make the skin fuller and firmer.
How to use
Applicable steps: cleansing → toner → vitamin C essence → lotion / cream (recommended for use at night, strict sun protection during the day).
Dosage: 2-3 drops each time (about 0.5-1ml), apply evenly on the face and neck, avoid the area around the eyes (the skin around the eyes is thin and easily irritated).
Frequency: It is recommended to use once every 1 day for the first time, and can be used every day after tolerance is established (sensitive skin needs to reduce the frequency).
Notes
Establish skin tolerance: Active vitamin C (especially high-concentration L-vitamin C) may be irritating to the skin. For the first use, you can first test it locally (such as behind the ear), and then use it on the whole face if there is no redness or stinging; start with a low concentration (5%-10%) and gradually increase the concentration.
Sun protection is a prerequisite: Vitamin C is photosensitive (it is easily oxidized and ineffective when exposed to ultraviolet rays, and may also aggravate skin sensitivity). After use during the day, it must be used with SPF30+ or above sunscreen, otherwise it may darken or irritate the skin.
Storage method: Keep away from light, seal, and store at low temperature (can be refrigerated), avoid direct sunlight and high temperature; use up as soon as possible after opening (usually 1-3 months, see the product instructions for details), and it is recommended to stop using it if the color becomes darker after oxidation (such as from transparent to yellow to brown).
Ingredient combination taboos: Avoid using it with high-concentration acids (such as high-concentration salicylic acid, A acid) and alcohol products at the same time, which may increase irritation;
When using it with niacinamide, please note that some people may be sensitive to the pH value of the mixture of the two, and it is recommended to use it 30 minutes apart.
Applicable skin types
Oily and combination skin are suitable for refreshing types (such as watery and essence textures);
Dry and sensitive skin is recommended to choose mild vitamin C derivatives (such as ascorbyl glucoside) or products with added repair ingredients.