Release time：2024-01-03 Click:
Vitamin A is a fat soluble vitamin, an organic compound with the chemical formula C20H30O. It is stable to heat, acid, and alkali, and is easily oxidized. Ultraviolet radiation can promote its oxidative damage. Vitamin A includes A1 and A2, with A1 being retinol. Vitamin A2, also known as 3-dehydroretinol, has a physiological activity of 40% of vitamin A1.
Vitamin A has various physiological functions such as promoting growth and reproduction, maintaining normal secretion of bones, epithelial tissues, vision, and mucosal epithelium. Vitamin A and its analogues have the effect of preventing precancerous lesions. When lacking, it manifests as delayed growth and reduced dark adaptation ability, leading to night blindness. Due to dryness, desquamation, excessive keratinization, and reduced tear gland secretion of epidermal and mucosal epithelial cells, dry eye disease occurs, and in severe cases, corneal softening, perforation, and blindness occur. Respiratory epithelial cells keratinize and lose cilia, reducing their resistance and making them susceptible to infection. The recommended daily intake (RNI) of vitamin A for adults in China is 800 for males μG retinol active equivalent, 700 per day for females μ G retinol activity equivalent. Foods that contain high levels of vitamin A include the liver of poultry and livestock, egg yolks, and milk powder. Carotenoids can be converted into vitamin A in the small intestine mucosa. Red yellow and dark green vegetables, as well as fruits, contain high levels of carotenoids.
Vitamin A acetate and vitamin A palmitic acid are both vitamin A additives commonly used in feed and cosmetics.
The pure compound of vitamin A is retinol, which is highly susceptible to destruction. Therefore, its stability can be increased through some chemical treatment processes. The first step is to esterify it first. Esterification is beneficial for the stability of vitamin A additives. Organic acids that esterify vitamin A commonly include acetic acid, propionic acid, and palmitic acid. Therefore, there are different vitamin A additives such as vitamin A acetate and vitamin A palmitic acid.
Carotenoids and zeaxanthin, which exist in plants, can be converted into vitamin A in the human body through the action of related enzymes as well, they are known as vitamin A precursor,among them, β- Carotene has the highest conversion rate to Vitamin A.
Leading Chem is supplying
Vitamin A Acetate ester 1.0MIU 2.0MIU 2.5MIU 2.8MIU (Food grade)
Vitamin A palmitate 1.0miu 1.7miu(Food grade)
Vitamin A feed grade 500 ,650 ,1000
β- Carotene
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