What are the preservatives in common skin care products?

The common nipagin esters are methyl nipagin, ethyl nipagin, propyl nipagin and butyl nipagin, which is referred to as nipagin X ester for short.

Danger:

1. It has been reported that excessive use of nipagin in cosmetics will cause contact dermatitis, and it has also been reported that nipagin will accumulate in the human body, increasing the risk of breast cancer and uterine cancer in women. A large number of nipagin residues were found in pathological sections of a large number of breast cancer patients.

2, easy to cause skin allergies, accumulated on human skin, when accumulated to a certain amount, will accelerate the aging of the skin.

3, accelerate pigmentation, accelerate skin dullness, and accelerate skin aging.

4. Nipagin ester is an endocrine disruptor. It will affect the normal secretion of androgen in the body, increase the level of estrogen in the body and reduce the level of sperm; DNA damage, pregnant women use it will cause neonatal genital malformation.

Common formaldehyde emitters are quaternary ammonium salt-15, imidazolidinyl urea, diazoimidazolidinyl urea, or Gemma, Gemma BP, hydantoin, etc.

Danger:

Eye discomfort, reducing human immunity, skin allergy, irritating dermatitis, accelerating aging, skin cancer.

MIT is the abbreviation of methyl isothiazolinone, which is the most common preservative among isothiazolinone preservatives.

Danger:

1, skin allergic reaction, which can cause redness, blisters and skin cracking in severe cases.

2. Long-term use of the mask containing methyl isothiazolinone may cause irritating dermatitis, and pimples and papules will appear on the face. In severe cases, the swelling is obvious, and blisters and blisters appear. The latter has a tight blister wall and clear contents, and decays after rupture, with occasional tissue necrosis.

3. A scientific study published in the Journal of Pharmacology and Experimental Therapy and the Journal of Neuroscience in 2002 and 2006 respectively showed that methyl isothiazolinone was neurotoxic in vitro, and long-term exposure had toxic effects on neuron culture.

Phenoxyethanol, also known as phenoxyethanol, diphenyl oxyethanol.

More than 0.3% in the mask will give off heat and sting.