Vitamin A is an essential nutrient for complex organism, which affects almost all the tissues and cells in different ways. Vitamin A can promote the formation of pigment in visual cells. Vitamin A helps maintain the normal immune system, can strengthen the body's resistance to infectious diseases, especially respiratory infections and parasitic infections. Vitamin A also has a certain antioxidant effect, can neutralize harmful free radicals.

 1.Maintain the Visual function;
2.Maintenance of epithelial cell health and promote the synthesis of immunoglobulin;
3.Maintaining normal bone growth and development;
4.Promote growth and reproduction;
5.Inhibit tumor growth;
6.Nutritional supplement. 

Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.

Qingdao Sigma Chemical Co., Ltd has become the "Top 500 Chinese manufacturing companies",

"Top 20 of global chemical sales".Qingdao Sigma Chemical Co., Ltdhas 21 subsidiaries and holding companies.