Why does the niacinamide stock solution turn yellow? Can the niacinamide stock solution still be used after it turns yellow?

Niacinamide stock solution is a very good whitening and brightening skin care product. It is said that "a white skin can hide a hundred blemishes". Whitening is a long-term task. Many friends bought niacinamide stock solution and put it on their skin. After a while, they suddenly found that it turned yellow. What's going on?

Oxidation causes it. Generally, essences will oxidize after being stored for a long time. Pure niacinamide will not turn yellow if it is stored for a long time. The reason for the yellowing is that it is mixed with other ingredients in the product and oxidized to produce the yellowing phenomenon.

It can still be used, but the efficacy may be affected to a certain extent. It is recommended to use it up as soon as possible.

When using niacinamide stock solution, cleanse your face first. While your face is moist, apply an appropriate amount of niacinamide stock solution to your face, and then proceed with subsequent skin care procedures. You can also add niacinamide to toner, facial cream, or shower gel.

Niacinamide is a derivative of niacin. Applying it on the face can help whiten the skin. For most people, using niacinamide once at night is enough. If you want to achieve a quick whitening effect, you might as well use niacinamide in the morning and evening to help whiten your skin. However, tolerance must have been established to avoid facial allergies.

As we age, our body functions begin to weaken and the regeneration of facial protein begins to slow down. Niacinamide can promote skin metabolism, increase skin defense capabilities, and increase the water content in skin cells. Therefore, niacinamide also has anti-aging effects.

Niacinamide is a stimulating beauty ingredient. When used for the first time, it will cause a stinging sensation on the face, so it needs to be used in small doses. You must gradually build up tolerance, then gradually increase the dose, and finally use it normally. Sensitive skin has a fragile skin barrier, and it is easy to have allergic symptoms during the process of building tolerance. Therefore, it is recommended that sensitive skin should not use or use a small amount of niacinamide products.

One of the effects of niacinamide stock solution is oil control. External use of 2% niacinamide has a certain effect on controlling oil secretion. Niacinamide stock solution can also resist aging and improve fine lines. This is because the use of niacinamide can indirectly increase the synthesis rate and amount of various components in the skin, from keratin to collagen. Niacinamide stock solution can also repair the skin because it can promote the synthesis of ceramide in the skin and accelerate the differentiation of keratinocytes.