Kojic Acid 101: How It Works, How to Use and Best Products
3/31/2017·Kojie San Skin Lightening Kojic Acid Soap. Buy on Amazon. This is definitely one of the most inexpensive ways to work kojic acid into your skin care routine. At only around $8 for three bars, Kojie San is a gentle skin cleansing soap that can be used on all parts of the body up to twice a day to lighten freckles, moles and dark spots.