You're kidding! This mask is quite famous. who did you hear that from？

I measured it myself! On the internet of a beauty doctor, a treasure bought a highlighter and took a photo. If there is a fluorescent agent, the fluorescent pen will emit blue light at one point. I just tried it, and this mask turned blue. I dare not use it again!

Is this ... reliable?

Interviewed expert: Chen Yongjun, attending physician of Laser Plastic Surgery Center of Dermatology Hospital of Southern Medical University.

Blue light doesn't mean fluorescent agent is added, said Chen Yong military doctor. It's really unreliable. Measuring fluorescent agent is not so simple, it needs a special laboratory to do it.

Because, "it's not just fluorescent agents that produce fluorescent reactions." Fluorescence reaction is a phenomenon that blue light will be emitted after being irradiated by fluorescent pen.

The ingredients commonly used in many skin care products will also emit blue light when illuminated with a highlighter.

Permanent "guests" in skin care products: vitamin E and protein; "Frequent visitor" silica in sunscreen; Some plant extracts, such as chlorophyll, ginkgo flavone, Sophora flavescens alkaloid, etc. "As long as it is a regular product, it doesn't matter if the fluorescent agent is detected. It is completely usable. "

It is legal to add fluorescent agent to skin care cosmetics.

For example, the most common fluorescent agent CBS can be found in the Catalogue of Used Cosmetic Raw Materials in China.

Fluorescent agent, the full name of fluorescent whitening agent, is added to skin care cosmetics, which has the functions of whitening, modifying skin color and concealing concealer. Widely used in some isolation, foundation and concealer products.

"As long as it is added according to national standards, it will not hurt the skin." But Chen Yongjun stressed that we must buy regular and qualified products.

He pointed out that some "three noes", fake and shoddy products may add too many or unqualified fluorescent agents in pursuit of quick results. Long-term use may cause damage to stratum corneum, skin barrier and sensitive muscles.

Will long-term use of skin care cosmetics containing fluorescent agents disfigure or cause cancer?

Chen Yongjun said, there is really no need to be afraid.

In fact, fluorescent agents are everywhere, and fluorescent agents have been added to clothes worn by people, toilet paper used every day, laundry detergent, washing powder, soap and many other daily necessities of the laundry giants.

Although the human body often contacts fluorescent agents, fluorescent agents are large particles, and we have a "wall" of skin barrier, so external fluorescent agents are not easy to enter the human body through the skin.

Moreover, the CBS fluorescent agent mentioned above is water-soluble, even if there is residue on the skin, it will disappear when washing your face and taking a bath. Unless taken orally, it may cause some damage to the liver.

As for the theory that fluorescent agents cause cancer, Chen Yongjun said it was only a risk warning. "So far, there is no scientific report about the carcinogenicity of fluorescent agents."