La Roche-Posay lotions are collectively known as the "Safe Water Family", which has six members, focusing on moisturizing and soothing, acne and whitening. Like SkinCeuticals, La Roche-Posay is part of the L'Oréal Group, which is known as "Acne Skin Love", and La Roche-Posay is one of its strengths in the care of skin with problems such as oil control and acne, and its Acne Removal and Tean Collections are also the most recommended.
 
Since the main ingredient of lotion is water, it is not possible to become the main force of acne removal and whitening products, but to play an auxiliary role or to maintain stability in daily life. K milk is the flagship brand of La Roche-Posay's acne cleansing range, and when used in conjunction with the acne cleansing toner, it can play a consolidating role. Acne Cleanser, also known as oil control and safe water, mainly uses salicylic acid and fruit acid to exfoliate, which has a certain effect on closed acne, and is also a good choice for daily maintenance of skin with occasional acne. According to different needs, acne cleansing water is also divided into special moisturizing type and ordinary type, the ordinary type is added with witch hazel extract, which plays an astringent and anti-inflammatory role, and is suitable for oily skin. The special moisturizing type focuses on moisturizing and can be used for all skin types, but it is more recommended to try it for tolerant skin overall, and the price of 150 yuan/200ml is more reasonable.
 
Teanshu Lotion is a lotion that can also be used for sensitive skin, also known as hydrating and safe water, a large amount of moisturizer dissolved in water, with dipotassium glycyrrhizate, is a soothing and moisturizing formula, 200ml reference price 180 yuan.
 
Deionized water is the most widely used water for cosmetics production in China, while La Roche-Posay advocates the addition of hot spring water to its products. Rich minerals and trace elements are the biggest selling point of hot spring water, as the main ingredient of lotion water, good water source can ensure high quality, so some high-end brands in France and Japan should build factories near good water sources.