The invention provides a novel synergistic composition comprising of carrot phytonutrients; natural carotenoids from Dunaliella salina or marigold or the like, and/or combinations thereof; other antioxidants such as vitamin E, vitamin C; in association with other constituents such as chromium, trace elements like Zinc, selenium; and vitamins such as vitamin B1, Vitamin B6, folic acid and vitamin B12 for diabetics and process of its preparation.