Usually one or two bottles need to be used continuously to have obvious effects. The ingredients specially added in this cosmetic are natural herbal essence, which will not affect the skin after use. It won't cause irritation or harm. Proper use can quickly replenish the water fee needed by the skin and make the skin moisturized all day. Some consumers can also form a protective film on the skin surface after using it to prevent the external environment from irritating and hurting the skin.