Hydroxytyrosol is a natural polyphenol compound with strong antioxidant activity, mainly present in the fruits and leaves of olives in the form of esters.

Astaxanthin is a powerful antioxidant found in shrimp and other crustaceans. It has numerous beneficial effects, making it a valuable component in food additives and animal feed.

Protocatechuic acid (PCA) is a natural phenolic compound with a variety of biological activities. It has antibacterial, antioxidant, anti-inflammatory, anti-hyperglycemic, and neuroprotective effects.

Caffeic Acid is a polyphenol compound widely distributed in many traditional Chinese medicinal plants, such as Artemisia annua, Safflower, and Lonicera japonica. It has a variety of pharmacological effects, including cardiovascular protection, anti-mutagenesis and anti-cancer, anti-bacterial and anti-viral, lipid-lowering and blood sugar-lowering, anti-leukemia, immune regulation, choleretic and hemostatic, and anti-oxidation. It also has a wide range of applications in the cosmetics industry.