Shikimic acid in the light of current knowledge.

Shikimic acid (SA) has been mainly used in the pharmaceutical industry for production of drugs, however, recently it has also appeared in the world of cosmetics. So far, there have not been many publications on cosmetics containing SA or research studies on the compound, especially those that would involve testing cosmetic products on subjects. The main source of SA is star anise. The recommended concentration of SA in cosmetic preparations ranges between 1 and 5%. The pH of a 5% solution of SA in water is 3. SA at a concentration of 5% has a similar exfoliative effect to that of 50% glycolic acid. It shows antiviral, exfoliating, deodorizing, anti-acne, anti-dandruff, whitening and moisturizing activity. It also regulates the amount of secreted sebum, moreover, it has antibacterial, anti-inflammatory, hair-growth stimulating, anti-aging effect and antifungal properties.