Sinapic acid is one of the most common hydroxycinnamic acids and is widespread in the plant kingdom. It has been identified in various fruits, vegetables, cereal grains, oilseed crops, some spices, and medicinal plants. Sinapic acid and its derivatives possess antimicrobial, antioxidant, anti-inflammatory, anticancer and anti-anxiety activities.

Traumatic acid (TA) is a plant hormone (cytokinin) that in terms of chemical structure belongs to the group of fatty acids derivatives. It was isolated from Phaseolus vulgaris. It was discovered, that TA showed a stimulatory effect on antioxidative enzyme activity, reduced glutathione, thiol group content, and lipid peroxidation in physiological conditions. TA exhibited protective properties against ROS production. Thus, TA could be a potentially powerful agent with applications in the treatment of many skin diseases connected with oxidative stress and collagen biosynthesis disorders.