At present, there are many anthocyanin health foods on the market. People have a vague understanding of the names and contents of their functional ingredients when purchasing them. These three names often appear in the detection of functional ingredients of health food. The concepts are introduced as follows:
★Anthocyanidin is a kind of water-soluble natural pigment that widely exists in plants in nature. It is obtained from the hydrolysis of anthocyanins and exists in many fruits and vegetables, such as blueberries, cherries, strawberries, grapes, black currant, bilberry Etc., under the conditions of different pH values of plant cell vacuoles, anthocyanins make plants show colorful colors, the cell fluid is acidic and reddish, and the cell fluid is alkaline and blue. All anthocyanins in their natural state exist in the form of glycosides, called anthocyanins, and few free anthocyanins exist. It is mainly used in food coloring, and can also be used in dyes, medicine, cosmetics and so on.
★Proanthocyanidins and proanthocyanidins have the same meaning and are the same substance, but they are called differently. Because they can be converted into anthocyanins in plants, they are called proanthocyanidins or proanthocyanidins. The English name is Proantho Cyanidins (referred to as PC). It is the precursor of anthocyanin and is a polymer. It can be heated in an acidic medium to produce anthocyanin. This feature is also used in the detection of components to carry out detection work.
★Proanthocyanidin is a kind of bioflavonoid mixture with special molecular structure, which is widely present in plants. It can be said to be the secondary metabolite of plants. It is not a single compound, but is composed of a series of compounds. The basic structure is composed of flavan-3-ol-catechin (catechin) and epicatechin (epicatechin) are monomers to form dimers (procyanidin B series), trimers (procyanidin C series), tetramers and other polymers, The structure is divided into A-type and B-type due to the polymerization method, usually two to pentamers are called oligomeric proanthocyanidins (Oligomeric Proantho Cyanidins for short OPC), and its physiological activity is the best, it is currently internationally recognized. An effective natural antioxidant against free radicals in the body.
Although OPC has such a magical effect, it cannot be produced by the human body, and it is mostly concentrated in the skin, shell, seed, leaf, stem and other parts of plants, especially in grape seeds and French maritime pine bark. Its extraction is mainly based on grape seeds as the most extensive source of materials. Proanthocyanidin (grape seed extract) is a new type of high-efficiency antioxidant with strong in vivo activity. It is generally a reddish-brown powder, with a slight smell and astringent taste, soluble in water and most organic solvents. Experiments have shown that the anti-radical oxidation ability of oligomeric proanthocyanidins OPC is 50 times that of vitamin E and 20 times that of vitamin C, and the absorption is rapid and complete. , the highest blood concentration can be reached within 20 minutes of oral administration, and the metabolic half-life is as long as 7 hours.
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