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Rosemary extract carnosic acid is a kind of diterpenoid compound isolated from the leaves of rosemary Rosmarinusofficinalis. It is white or yellow-white powder.It is easily soluble in oil, ethanol and ethyl acetate,Organic solvents such as acetone and chloroform, but insoluble in water.

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Carnosic acid is suitable for the antioxidant of oil soluble components. Used in sauces, pet food and feed, it has antioxidant and anti-aging effects. Strong effect of weight loss and fat reduction;It can cure cardiovascular disease and cancer.

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The researchers found that the antioxidant activity of rosemary extract at 300mg/kg was equivalent to 200mg/kgBHA and greater than 100mg/kg tocopherol. Generally, its antioxidant capacity increases with the increase of the amount added, but the high concentration can precipitate the oil and make the water-containing food discoloration. The antioxidant function of rosemary mainly lies in its quenching singlet oxygen, scavenging free radicals, chelating metal ions and synergistic effect of organic acids.