Can the light bulb be used during the day? Which ingredients in skin care products cannot be used during the day?

sk2 light bulb is a whitening essence lotion, and it is called this because of its appearance similar to a light bulb. However, some essences may not be used during the day, so can the SK2 mini light bulb be used during the day?

Can the light bulb be used during the day?

It can be used during the day. There is no photosensitive component in sk2. For example, if you look at the ingredients, those containing arbutin are photosensitivity (sensitive to ultraviolet rays but not light) and cannot be used during the day, but the others are fine.

Of course, it is very important to pay attention to sun protection and strengthen sun protection, whether it is used during the day or at night. In the cold winter, you need to pay attention to sun protection.

What ingredients in skin care products cannot be used during the day?

Skin care products are made up of some chemical ingredients and plant additives, some of which will oxidize and lose their effectiveness when exposed to sunlight. Skin care products containing the following photosensitive ingredients should be used less during the day:

Arbutin AHA, salicylic acid, high concentration of VC, glycyrrhizic acid A, orange flower beta carotene (VA also called retinol), lemon (actually VC)

Take the ingredient arbutin for example. Arbutin is unstable and photosensitivity. This photosensitivity is converted into photochemical products under the irradiation of long-wave ultraviolet UVA in sunlight, and then combines with proteins in the skin to form a new antigen, which can cause an allergic reaction in the skin.

Also, most essential oils should not be used during the day. This is also one of the reasons why essential oil bottles are kept away from light, as they will decompose and change when exposed to light.

The same goes for essences such as parsley seed, grape seed, and evening primrose. The principles are similar to essential oils.

Note: VC is actually not photosensitivity, but don't use it during the day. Oxidation and yellowing are not due to photosensitivity, but because it has been oxidized and will disappear once washed.

SK2 light bulb ingredients

1. Hydrating and moisturizing ingredients

(1) Butylene glycol glycerol

Butylene glycol and glycerin are a perfect combination for hydrating and moisturizing. They both have good hygroscopicity. Glycerin replenishes moisture by absorbing moisture from the air, while butylene glycol locks moisture in the stratum corneum. The combination of the two enhances the moisturizing effect. However, glycerin will absorb water from the skin in dry air, so pure glycerin skin care products should not be used.

(2) Panthenol Inositol

Inositol is a plant extract with the same effect as VB. It has a moisturizing and conditioning effect on the skin. Panthenol can increase the content of hyaluronic acid in the skin and promote the metabolism rate through interaction with VB. Compared with glycerin, it is a non-sticky moisturizing ingredient. The interaction between these two moisturizers can improve the skin's ability to absorb and penetrate.

2. Whitening ingredients

(1) Filtrate of galactosyl yeast fermentation product

This is a natural yeast extract that is often added to high-end skin care products. It is a small molecule ingredient that can produce VB and amino acids to help improve skin care effects. Its most obvious effect is to condition the skin, improve oil balance and brighten the skin.

(2) Niacinamide

Niacinamide is a medicinal ingredient with high safety. Research in recent years has found that it can effectively inhibit the deposition of melanin. In addition to the most traditional whitening effect, niacinamide also has the effect of clearing melanin that has already been deposited.

(3) Undecylenoylphenylalanine

This is a melanocyte-stimulating hormone receptor antagonist. In layman's terms, it can bind to the melanocyte-stimulating hormone receptor but is not active. It can effectively reduce the production of melanin and play a whitening role, but due to its poor permeability, the whitening effect is not very obvious.

3. Instant brightening ingredients

(1) Mica

Mica is a mineral ingredient that will not be absorbed by the skin and will not cause damage to the skin. Its main function is to enhance the instant brightening effect of cosmetics. Mica is like a small mirror, increasing brightness and improving skin texture and feel.

(2) Boron nitride

Boron nitride is non-toxic and has a lubricating effect. It can make the texture of cosmetics smooth and easy to apply. Its effect is similar to talcum powder and has a certain concealing ability. At the same time, boron nitride is white in color and can instantly whiten and brighten the skin.