Vitamin-C is essential to skin health. It is effective in protecting the skin against free radicals and UV light. In addition to its antioxidant functions, vitamin-c regulates structural collagen protein which is a main component of the skin. The use of vitamin-c in topical applications may reduce wrinkling, protein fiber damage, dry skin, brighten the skin, and increase collagen production.
Lemon contains a high content of vitamin-c which is a big factor in its brightening properties. Thanks to citric acid (an alpha hydroxy acid), it aids in fading dark spots and blemishes, creating a brighter and even complexion. Acids can make your skin sensitive to UV light, so always remember to apply sunscreen after use.