First, there are many whitening ingredients in cosmetics, such as the following:
1. Vitamin C: inhibits melanin and promotes collagen formation.
2. Arbutin: Inhibits the activity of complex amino acid enzymes and reduces the production of melanin. It is a typical inhibitory whitening ingredient.
3. Niacinamide: It can inhibit melanin, whiten skin, and has stable properties.
4. Kojic acid: In comparative experiments, it was found that among the existing whitening ingredients, its effect is the most obvious. Generally, kojic acid is extracted from filamentous fungi such as Penicillium and Aspergillus. It is a toxic cell, so it is not completely popular in the market. The properties are not stable enough and the safety factor is not high.
5. Fruit acid: After removing the hyperkeratotic stratum corneum, it stimulates the growth of new cells. It also helps to remove facial fine lines and lighten epidermal pigment, making the skin softer, whiter, smoother and richer. elasticity.
Second, the comparison between vitamin C and nicotinamide has its own merits. The summary is as follows:
1. Vitamin C: It can dilute melanin and whiten a tanned face. It can also slow down skin aging, resist free radicals, and keep skin clean and transparent for a long time. Although VC products are good, don’t pursue high concentrations too much, especially in the early stages of use, so that tolerance can be built up.
Advantages: High safety factor
Disadvantages: The whitening effect is not thorough enough.
Vitamin C can effectively reduce the formed melanin to colorless melanin precursor. They are also necessary components for the body to maintain metabolism. They are safe, but the whitening effect is not thorough enough.