Does kojic acid whitening need to be protected from light?

You may not be familiar with kojic acid, but everyone knows the kojic acid essence from Cosme Decorte. This kojic acid essence has a very good effect in whitening and removing yellowness, thanks to the whitening ingredient kojic acid! So, let’s mainly talk about whether kojic acid essence can be used during the day? Is it necessary to avoid light when using?

Does kojic acid whitening need to be protected from light?

need. Kojic acid can control skin pigmentation and has the effect of whitening and removing spots, but it will become ineffective in strong light or overly acidic environments. Therefore, products containing kojic acid are best used at night and should be avoided together with salicylic acid, fruit acid, and high-concentration VC.

Which whitening ingredients need to be used away from light?

1. Vitamin C. Vitamin C is a good whitening ingredient with good antioxidant effects. It can scavenge free radicals and accelerate the decomposition and metabolism of melanin. However, the nature of vitamin C is unstable. When used during the day, it is easily affected by ultraviolet rays and oxidized and decomposed, resulting in loss of activity and waste.

2. Retinol. Retinol will be decomposed in the presence of light. The decomposition products are irritating to the skin, damaging the skin's stratum corneum and reducing the skin's resistance.

3. Salicylic acid, fruit acid, and mandelic acid. These acid components are not photosensitivity, but their activity is enhanced under the action of light, thereby damaging the stratum corneum and impairing the skin barrier.