- Lemon In fact, vitamin C in lemons is essential to produce collagen, which is the main building block of youthful skin. So, when applied topically, it helps fight wrinkles and other signs of ageing. Lemon is also a natural exfoliant, which makes it a great treatment for acne and blackheads. - Turmeric helps brighten skin and the appearance of uneven tone, leaving you with clearer skin. Your skin wounds may heal a lot quicker when you wash with turmeric soap. The anti-inflammatory properties decrease the skin's inflammation; and speed up the skin's ability to form new tissue