Ferulic Acid, as a phenolic plant ingredient, can form relatively stable free radicals due to its conjugate system. Then it plays the role of stopping the free radical chain transfer in the automatic oxidation process of lipids. Therefore, Ferulic Acid has strong antioxidant activity, and can scavenge free radicals. Studies have shown that Ferulic Acid has a strong scavenging effect on DPPH free radicals, hydroxyl radicals and superoxide anions. Half inhibitory concentrations are 0.552mg /mL, 0.282mg /mL and 0.111mg /mL respectively. Ferulic Acid can also promote the production of free radical scavenging enzymes to achieve its anti-oxidative effect. It promotes the production of glutathione and NADP. When used in combination with vitamin C and vitamin E, it increases their stability and doubles their antioxidant capacity.
Ferulic Acid can inhibit tyrosinase activity. It can reduce the proliferation activity of melanocytes. Test result shows that when use 0.1-0.5% Ferulic Acid solution, the number of melanocytes decreases from 117±23/mm2 to 39±7/mm2. The inhibition rate of tyrosinase is up to 86%, when use 5mmol/L Ferulic Acid solution. Therefore, Ferulic Acid can whiten skin and remove spots. It has great whitening effect.
Ferulic Acid has good sun protection function. It can effectively absorb the ultraviolet rays in the wavelength range of 290~330nm. Thereby it prevents or reduces skin damage caused by the ultraviolet rays. (The UV rays in the range of 305-310nm are most likely to induce the skin erythema).
