The sour taste of lemon is mainly citric acid. Citric acid is a necessary part of the process to promote caloric metabolism, and it also has the function of eliminating fatigue.
Strawberry is rich in amino acids, fructose, sucrose, glucose, citric acid, malic acid, pectin, carotene, vitamin B1, B2, niacin and minerals such as calcium, magnesium, phosphorus, iron and other fruit acids and nutrients. White and increased elasticity, make the skin moist and shiny, and more suitable for oily skin.
Natural citric acid is found in fruits such as lemons, citrus, pineapples and the like.