Vitamin C Feed Supplement is an essential dietary ingredient for fish, prawn and shrimp and is essential in prawn and shrimp for disease resistance, rapid growth, high survival and moulting. The Supplement is linked to improving immune response, hormone production, mineral absorption and metabolism, and plays an important role in shell development and protein metabolism of prawn and shrimp. The Supplement is a concentrated and stable form of vitamin c and has to be used at 0.5 to 2.0 grams per kg of feed regularly for getting good results. The Supplement comes packed in 100 gm, 500 gm and 1.0 kg HDPE containers. The Vitamin C Feed Supplement is reported to influence the alkaline phosphatase activity during the synthesis of chitin and sclerotization of the epicuticle.