USDA dietary pattern shows the importance of consuming all vitamins and minerals in an individual’s diet. The importance of vitamin A is also presented in the dietary recommendation. According to USDA, vitamin A is needed for normal vision, strong functioning, and maintenance of the immune system, reproductive system, lungs, heart, kidneys, and other organs.
Vitamin A refers to a fat-soluble vitamin that is found in two different types; one is preformed vitamin A that is found in poultry, fish, meat, and dairy products, and the other is provitamin A, which is found in vegetables, fruits, and other plant-based products. The adequate amount needed for vitamin A in the human body depends on the different ages, gender, and health conditions of an individual. The recommended intake of vitamin A ranges between 400 Âµg RAE to 800 Âµg RAE from birth to adulthood, whereas pregnant women and breastfeeding women may need vitamin A ranging between 800 mcg RAE to 1300 Âµg RAE.
The deficiency of vitamin A is not common in the United States (US), however some people become deficient in vitamin A and can face issues like cystic fibrosis, premature infants, measles, and premature birth.
Essential minerals needed by the body in large quantities are known as macro minerals or major minerals. Macrominerals are necessary for nutrition every day in levels greater than 100 milligrams. The major minerals or macro minerals required by the body include sodium, potassium, chloride, calcium, phosphorus, magnesium, and sulfur. They are present in different food sources. Therefore, a diversified diet enhances the ability to meet the nutrition requirements of individuals significantly in terms of macro minerals. The body absorbs minerals with greater difficulty than most vitamins. Hence, the bioavailability of minerals must be relatively low. Plant-based meals often include mineral-binding agents, such as oxalate and phytate, which bind to minerals and slow their absorption. Animal-based foods such as meat and dairy seem better for mineral absorption. Increased mineral intake usually reduces absorption. On the other hand, some vitamins aid in the absorption of minerals. Moreover, certain gastrointestinal disorders and diseases, such as Crohn’s disease, impair mineral absorption.
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