Vitamin A includes A1 and A2, and A1 is retinol. Vitamin A2 is 3-dehydroepianthol, and its physiological activity is 40% of that of vitamin A1.
Vitamin A can promote growth and reproduction, maintain the normal secretion of bone, epithelial tissue, vision and mucous epithelium and other physiological functions. Vitamin A and its analogues can prevent precancerous lesions. In the absence of it, growth retardation and dark adaptability decrease, resulting in night blindness. Dry eye disease occurs due to the dryness, desquamation, hyperkeratosis and decreased lacrimal gland secretion of epithelial cells of epidermis and mucosa. The cornea in severe cases is softened, perforated and blind. The epithelial cells of respiratory tract keratinized and lost cilia, which made the resistance reduced and easy to infect. Foods with more vitamin A include liver, egg yolk and milk powder of poultry and livestock. Carotene can be changed into vitamin A in intestinal mucosa, red yellow and dark green vegetables, and fruits contain more carotene.

 1. Free samples available before confirming the order to avoid any problems.
 2. Goods delivered directly from the factory warehouse after well produced in a high quality and good            situation.
 3. Competitive price
 4. Prompt shipment,  usually within 10  working days after confirming the order.
 5. Testing equipment: SGS, UV, HPLC, GC, CIQ.
 6. Supply Ability:  2000 tons/month, large stock available;

1. What's Your Payment Terms?

a: We Are Ok For t/t, l/c At Sight, l/c 90/120 Days, We Can Also Try Oa For Regular And Reliable Clients.

2. What's Your Delivery Time?

a: Usually We Will Arrange The Shipment In 7 -15 Days.

3. How About The Packing?

a: Usually We Provide The Packing As 25 Kg / Bag Or Carton. Of Course, If You Have Special Requirements On Them, We Will According To You.

4. How About The Validity Of The Products?

a: According To The Products You Ordered.

5.How To Confirm The Product Quality Before Placing Orders?   

a: You Can Get Free Samples From Us Or Take Our Sgs Report As Referene Or Arrange Sgs Before Loading.

6. What Is Loading Port?

a: Usually Is Tianjing ,Qingdao Or Wuhan.