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  2. Vitamin A - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A

    Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of vitamin A deficiency is night blindness. [6] Vitamin A in the form of retinoic acid is essential to normal epithelial cell ...

  3. Hypervitaminosis A - Wikipedia

    en.wikipedia.org/wiki/Hypervitaminosis_A

    Preformed vitamin A is fat-soluble and high levels have been reported to affect the metabolism of the other fat-soluble vitamins D, [24] E, and K. The toxic effects of preformed vitamin A might be related to altered vitamin D metabolism, concurrent ingestion of substantial amounts of vitamin D, or binding of vitamin A to receptor heterodimers ...

  4. Hypervitaminosis - Wikipedia

    en.wikipedia.org/wiki/Hypervitaminosis

    With few exceptions, like some vitamins from B-complex, hypervitaminosis usually occurs with the fat-soluble vitamins A and D, which are stored, respectively, in the liver and fatty tissues of the body. These vitamins build up and remain for a longer time in the body than water-soluble vitamins. [2] Conditions include: Hypervitaminosis A

  5. 8 vitamins and supplements for weight loss backed by science

    www.aol.com/8-vitamins-supplements-weight-loss...

    Vitamin B12. Vitamin B12 helps ... Some side effects of green coffee extract can include upset stomach, headaches, difficulty sleeping, and abnormal heart rhythms. ... This is why it's best to ...

  6. The dark side of daily vitamin D supplements: After a man ...

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    For more on safely consuming vitamin D: 5 foods rich in vitamin D to protect your memory and boost brain function Vitamin D supplements may lower your heart attack risk.

  7. Vitamin A deficiency - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A_Deficiency

    Vitamin A supplementation of children under five who are at risk of VAD has been found to reduce all‐cause mortality by 12 to 24%. [29] Side effects of vitamin A supplements are rare. Vitamin A toxicity is a rare concern associated with high levels of vitamin A over prolonged periods of time.

  8. Retinyl palmitate - Wikipedia

    en.wikipedia.org/wiki/Retinyl_palmitate

    Retinyl palmitate, or vitamin A palmitate, is the ester of retinol and palmitic acid, with formula C 36 H 60 O 2. It is the most abundant form of vitamin A storage in animals. [2] An alternate spelling, retinol palmitate, which violates the -yl organic chemical naming convention for esters, is also frequently seen. [citation needed]

  9. Airborne (dietary supplement) - Wikipedia

    en.wikipedia.org/wiki/Airborne_(dietary_supplement)

    Side effects from vitamin overdoses may occur, especially in patients with kidney failure. In very large doses, vitamin C in kidney-failure patients can cause severe side effects such as oxalate deposits in bone and soft tissues and may interfere with the absorption and metabolism of vitamin B 12. The product contains 1 g of vitamin C per ...