Answer – Iron
According to guidelines stated in the “Guidance for Industry: Food Labeling Guide” published by the U.S Food and Drug Administration (FDA) in September 1994 and last revised in January 2013, it is required that Vitamin A, Vitamin C, Calcium, and Iron must appear on nutritional labels if they are contained in the food.
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the body composition is the ratio of body fat to the muscles
Answer:
Ask your parents. Follow what you believe if you're really faithful to it. If not I'd say do what you want.