RDAs have been set for phosphorus to meet the needs of bones and for cellular needs. Adequate intake levels (AI) have been estimated for infants. Please refer to Table 10-1 for adequate levels of phosphorus for all ages.
Table 10-1 RDAs and adequate intakes (AI) for phosphorus for all ages.
FOOD SOURCES OF PHOSPHORUS
Phosphorus is found in virtually all food; please refer to Graph 10-1. Americans are estimated to receive more than enough phosphorus in the diet. Phosphorus is found in the form of phosphoric acid in many soft drinks. Phosphorus levels in the diet have increased because of food additives. The phosphorus in the seeds of plants is found in the form of phytates (also called phytic acid). Phytates lessen the availability of calcium, magnesium, and iron. In phytate or phytic acid form, only about half of the phosphorus is available for absorption. This presents little difficulty as phosphorus is present in virtually all diets in adequate amounts.
Table 10-1 RDAs and adequate intakes (AI) for phosphorus for all ages.
FOOD SOURCES OF PHOSPHORUS
Phosphorus is found in virtually all food; please refer to Graph 10-1. Americans are estimated to receive more than enough phosphorus in the diet. Phosphorus is found in the form of phosphoric acid in many soft drinks. Phosphorus levels in the diet have increased because of food additives. The phosphorus in the seeds of plants is found in the form of phytates (also called phytic acid). Phytates lessen the availability of calcium, magnesium, and iron. In phytate or phytic acid form, only about half of the phosphorus is available for absorption. This presents little difficulty as phosphorus is present in virtually all diets in adequate amounts.
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