Can hyaluronic acid liquid be applied directly on the face? Why does it turn yellow?

Hyaluronic acid stock solution is often used in cosmetics and skin care products. It can moisturize the skin. The reason why it is called hyaluronic acid stock solution is because this substance is crystal clear, just like glass. Moreover, hyaluronic acid and uric acid have nothing to do with each other. Can hyaluronic acid stock solution be applied directly on the face? Why does hyaluronic acid solution turn yellow?

Can hyaluronic acid solution be applied directly on the face?

Can be applied directly on the face.

Human skin itself contains Yuou hyaluronic acid, which can make the skin more elastic, more supple and more youthful.

In addition to using hyaluronic acid stock solution directly, it can also be used with lotion, cream, and mask. The hydrating and moisturizing effect will be better when hyaluronic acid essence is used together with skin care products.

When using it with lotion, use the lotion first and then the hyaluronic acid stock solution, so that the effect on the skin will be better.

The viscosity of the face cream is higher, while the liquid of hyaluronic acid stock solution is relatively thin. When using it with the face cream, use the hyaluronic acid stock solution first.

The method of using it with a facial mask is relatively simple. Just drop a few drops of hyaluronic acid solution on the mask, and then apply the mask on your face for 20 minutes.

Why does hyaluronic acid solution turn yellow?

When it turns yellow, it is because it has been oxidized and cannot be used anymore.

Hyaluronic acid stock solution is a transparent liquid. Once opened, it will undergo qualitative changes in less than a month. If it is not stored properly, the quality change will occur even faster.

There are signs of quality change in hyaluronic acid stock solution. When the hyaluronic acid stock solution turns yellow and has sediment, it means that the ingredients inside have changed. The purified ingredients and concentrated ingredients inside will be oxidized. The oxidized hyaluronic acid stock solution will undergo quality change and will no longer be suitable for use on the face.

After opening, you must pay attention to the storage method of hyaluronic acid liquid. It is very easy to deteriorate in high temperature and humid places. It should be placed in a cool and ventilated environment, preferably in a sterile environment. After opening, you can put it in the refrigerator. It is best to wrap it in a cowhide bag to prevent the hyaluronic acid liquid from mixing with other foods.

Although the shelf life of unopened hyaluronic acid solution is longer and can be stored for 2 years, it should be kept away from direct sunlight and high temperature, otherwise it will deteriorate.

This is all I have to say about hyaluronic acid stock solution. After all, this is something that is used on the face, so safety is the most important thing. It can be applied directly on the face, but if it has deteriorated, it is not suitable for application on the face.