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Vitamin D is a <span>fat-soluble </span>vitamin that <span>helps regulate the amount of calcium and phosphate in the body. </span><span>The recommendation for dietary allowance for Vitamin D for different categories of people are based on scientific research, publications, traditional use, or expert opinion. </span>Recommended daily allowance (RDA) is 600 International Units (IU) for those 1-70 years of age. Here belong also individuals around 20 years of age, so their recommended dietary allowance is also 600 IU.
The class of nutrient that is necessary for production is D. FAT