1, Sammi birch juice mask contains two preservatives, methyl p-hydroxybenzoate and phenoxyethanol, which can cause skin allergy, redness and itching and do great harm to the skin.

2. Sammi birch juice mask contains triethanolamine, which is weakly alkaline and easy to cause skin irritation and allergic reaction. CIR of the United States pointed out that it is safe in washing products, but long-term contact with products should be paid attention to. It is recommended to use it with caution, and saponification will occur when it reacts with fatty acids.