What is Carnosic acid (Rosemary leaf extract)?

Carnosic acid (Rosemary leaf extract) is a natural benzenediol abietane diterpene found in rosemary (Rosmarinus officinalis L.). Dried leaves of rosemary contain 1.5 to 2.5% Carnosic acid. It is considered to be a natural, efficient and stable (high temperature durable), security, non-toxic and none-side-effects, oil-soluble antioxidants and a green food additive. It can be added into oil and fatty food, pharmaceutical, chemical, cosmetics and feed, etc. In addition to prevent or delay the oxidation process of oil and fatty food, improve the stability of the food and extend the storage time, and be used as meat and fish sauce, it also has good physical and biological activities, such as antibacterial action, inhibiting the AIDS virus.

Carnosic acid benefits

It could effectively control body weight by regulating the absorption of fat, to achieve the goal of reducing weight, it also can treat inflammation, sore throats, and indigestion, prevent alzheimer’s disease, it can treatment of diabetes, and to promote the formation of nerve growth factor etc.

It is also tooth grinding and gargle agent and important raw materials, it can treat the menopause obstacles and delactation, it also can use for stomachic, has the function to the rheumatism, spasm, convergence, sterilization, expansion, inhibit sweating, peripheral vascular lower blood sugar levels, promote the secretion of bile.


Recognized as an antioxidant, the most notable benefit of Carnosic acid is its ability to protect against free radicals in the brain. The action of free radicals in the body gives rise to a number of diseases such as cancer, diabetes, and heart disease. In brief, a free radical is an atom that has an odd number of electrons, leaving one of them unpaired. Consequently, the atom snatches an electron from another atom to match up with its odd electron, turning the second atom into a free radical as well. This process continues, causing a destructive chain reaction on a molecular level, which ultimately results in damage to the cells.

What is Rosemary Extract?

Rosemary extract is a series natural plant extracts which extracted from Rosmarinus officinalis L, also named rosemary leaf extract. Applied to the skin, rosemary essential oil helps strengthen the capillaries and has a rejuvenating effect. Recent research is now revealing even more benefits attached to this remarkable herb, including its ability to help prevent cancer and age-related skin damage, boost the functioning of the liver and act as a mild diuretic to help reduce swelling. Although rosemary extract has been used commercially as an antimicrobial food preservative for years, now we know for certain that it also has a lot to offer as a nutritional supplement, 1 especially in the prevention of some types of cancer, allergies, and the progression of Alzheimer’s disease.

Rosmarinic acid exhibits various pharmacological activities including prevention of oxidation of low density lipoprotein, inhibition of murine cell proliferative activity and of cyclooxygenase, and anti-allergic action.

Ursolic aicd has wide biological effect and antioxidant effect, which act positively in anti-aging and removing splash. It can prevent and improve wrinkle and old-age splash through restore the skin’s collagen bundle construction and elastic. As a kind of cosmetics, it’s steady, its color and odor won’t change with the time. In addition, it has a good sense of touch.

Carnosic acid has outstanding fat-solubility, which can be used as antioxidant in meat, dairy products, oily-rich products, sweets.

Carnosol is a major component of Rosmarinus officinalis, it is a phenolic diterpene that has potent antioxidant and anti-inflammatory activities.

Carnosic acid (Rosemary leaf extract) Specification

Latin NameRosmarinus officinalis L.
Part of UsedLeaf
Active IngredientsCarnosic Acid
CAS No.3650-09-7
Specification5%, 15%, 20%, 25%, 30%, 40%, 60% , 90% HPLC
AppearanceYellow Greenish to Light Yellow Powder

Brownish Yellow to Yellow Brown Sticky Liquid

OdorLight Aromatic
Molecular FormulaC20H28O4
Molecular Weight332.43

Shelf Life

2 Years


Store in tightly sealed containers in cool and dry place, away from moisture, light, oxygen.


  • Packed in paper-drums and two plastic-bags inside. N.W:25kgs .I.D.35×H51cm.
  • 1Kg/Bag, aluminum foil bag vacuum packing.
  • Sample, double sealed water plastic bags inside with the aluminum bag outside.

Where to buy Carnosic acid (Rosemary leaf extract)?

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