The recommended daily amount (RDA) of a nutrient is determined by how much the body needs to stay healthy. Nutrients can be obtained in a variety of ways—from eating a varied diet to taking vitamin supplements.
A nutritional deficiency occurs when the body doesn’t absorb the necessary amount of a nutrient. Deficiencies can lead to a variety of health problems, such as problems of digestion, skin problems, stunted or defective bone growth, and even dementia.
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