Ans(1): No, setting 100% RDA for each and every new trend every day with food alone. Dietry suppliments are required. Because in today's busy life, food are changing and methods of having food are changing, this affects the digestion and other metabolic processes.
Ans(2): Yes, if we eat fresh food, in balanced amount.
Ans(3): Yes, If our metabolism is perfect.
Ans(4): Variety is food in very important because one doesnt have all the nutrients. so, to have all the required nutrients different variety of foods is required.
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