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Micellized Vitamin A | Definition and Overview

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Micellized vitamin A is a form of vitamin A that has been processed into tiny droplets called micelles, which can be easily absorbed by the body. This form of vitamin A is often used in supplements and fortified foods to improve absorption and utilization of the vitamin.

Recommended Daily Intake of Riboflavin

The recommended daily intake (RDI) of riboflavin varies depending on age, sex, and life stage. The following values are based on the Dietary Reference Intakes (DRIs) established by the Institute of Medicine:
Infants (0-6 months): 0.3 mg/day (Adequate Intake)
Infants (7-12 months): 0.4 mg/day (Adequate Intake)
Children (1-3 years): 0.5 mg/day
Children (4-8 years): 0.6 mg/day
Children (9-13 years): 0.9 mg/day
Adolescents (14-18 years): 1.0 mg/day (females) and 1.3 mg/day (males)
Adults (19 years and older): 1.1 mg/day (females) and 1.3 mg/day (males)
Pregnant women: 1.4 mg/day
Lactating women: 1.6 mg/day

Vitamin A is an essential nutrient that is critical to vision, immune function, and skin health. However, the body's ability to absorb vitamin A can be limited, particularly in individuals with digestive issues or nutrient deficiencies. Micellization is a process that enhances the absorption and bioavailability of fat-soluble vitamins such as vitamin A.

Micellized vitamin A is made by dissolving vitamin A in a solvent such as ethanol, and then adding a surfactant to create micelles. These micelles protect the vitamin A and allow it to be more easily absorbed by the body. Micellized vitamin A is often used in supplements for individuals with vitamin A deficiencies, skin conditions, or eye problems.

While micellized vitamin A may improve absorption and utilization of the nutrient, it is important to note that excessive intake of vitamin A can be toxic and lead to adverse effects. It is important to follow recommended dosages and consult with a healthcare provider before taking vitamin A supplements.

William H. McDaniel, MD

Dr. Robert H. Shmerling is the former clinical chief of the division of rheumatology at Beth Israel Deaconess Medical Center (BIDMC), and is a current member of the corresponding faculty in medicine at Harvard Medical School.

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