關於 what is vitamin a ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. Definition of vitamin A - NCI Dictionary of Cancer Terms

A nutrient that the body needs in small amounts to function and stay healthy. Vitamin A helps in vision, bone growth, reproduction, growth of epithelium ...

#12. What is Vitamin A? - News Medical

Vitamin A is a fat soluble vitamin that is required for a number of bodily functions. This vitamin is needed to maintain good vision and a ...

#13. Vitamin A (Retinol) Information | Mount Sinai - New York

The first sign of a vitamin A deficiency is often poor sight at night. It is needed for the proper development of an embryo and fetus. Vitamin A helps keep skin ...

#14. vitamin A | chemical compound - Encyclopedia Britannica

vitamin A, also called retinol, a fat-soluble alcohol, most abundant in fatty fish and especially in fish-liver oils. Vitamin A is also found in milk fat, ...

#15. Vitamin A - Health Encyclopedia - URMC - University of ...

Vitamin A is also called retinol. It was the first substance isolated in the group called vitamins. It is 1 of the 4 fat-soluble vitamins.

#16. Vitamin A Excess - Disorders of Nutrition - MSD Manuals

Vitamin A excess (toxicity) can be sudden (acute), usually due to accidental ingestion by children, or chronic. Consuming too much vitamin A causes hair loss, ...

#17. Overview of vitamin A - UpToDate

Vitamins are a number of chemically unrelated families of organic substances that cannot be synthesized by humans and must be ingested in the diet in small ...

#18. Vitamin A | Linus Pauling Institute

Summary. Vitamin A is a generic term that refers to fat-soluble compounds found as preformed vitamin A (retinol) in animal products and as ...

#19. Vitamin A - an overview | ScienceDirect Topics

Mark Feldman MD, in Sleisenger and Fordtran's Gastrointestinal and Liver Disease, 2021. Vitamin A. Among vitamin supplements, vitamin A remains the most ...

#20. Vitamin A: Sources & Benefits | Live Science

Vitamin A is a fat-soluble vitamin that is good for healthy vision, skin, bones and other tissues in the body. Vitamin A often works as an ...

#21. Vitamin A (A-25) - Side Effects, Interactions, Uses, Dosage ...

Vitamin A is found in foods such as milk, cheese, eggs, butter, fortified margarine, meat, liver, oily saltwater fish, grains, oils, ...

#22. Vitamin A | Nutrient Reference Values

It comes in a number of forms (as retinol, retinal, retinoic acid or retinyl ester). The term vitamin A is used in the context of dietary ...

#23. Vitamin A: Generic, Uses, Side Effects, Dosages, Interactions ...

Vitamin A is important for normal vision, the immune system, and reproduction. Vitamin A also helps the heart, lungs, kidneys and other organs work properly ...

#24. Vitamin A deficiency - WHO | World Health Organization

Xerophthalmia is the clinical spectrum of ocular manifestations of vitamin A deficiency; these range from the milder stages of night blindness and Bitot spots ...

#25. Vitamin A Deficiency - Patient.info

Vitamins are a group of substances needed in small amounts by the body to maintain health.Vitamin A cannot be made by the human body and so ...

#26. Vitamin A Deficiency - Disorders of Nutrition - Merck Manuals

Vitamin A deficiency can result from a diet low in vitamin A or an absorption or liver disorder. Night blindness is an early symptom. Blindness can eventually ...

#27. Vitamin A: foods, functions, how much do you need & more

Vitamin A is the generic name used for a group of fat-soluble compounds that include two main forms: carotenoids, found in plant and plant-based ...

#28. Vitamin A in Health and Disease | IntechOpen

Vitamin A refers to a group of related compounds with all-trans retinol biological activity and includes retinol, retinal, retinoic acid as well as the ...

#29. Vitamin a: Benefits, Foods, and How Much You Need - Insider

The benefits of vitamin A include preventing vision loss, boosting the immune system, and treating acne.

#30. Vitamin A | NZ Nutrition Foundation

Which foods contain vitamin A? · retinol (in animal foods) Retinol is found in liver, milk, cheese and butter. · carotenoids (in plant sources).

#31. Vitamin A | nidirect

milk; fortified low-fat spreads; yoghurt. Liver is a particularly rich source of vitamin A. Do not eat liver if you are pregnant.

#32. Top 10 Foods High in Vitamin A - My Food Data

High vitamin A foods include sweet potatoes, carrots, fish (tuna), winter squashes, dark leafy greens, cantaloupe, lettuce, bell peppers, ...

#33. Biomarkers of Nutrition for Development (BOND)—Vitamin A ...

Thus, this review describes the clinical and functional indicators related to eye health and biochemical biomarkers of vitamin A status (i.e., serum retinol, ...

#34. What is vitamin A and why do we need it? - Community Eye ...

Vitamin A, along with other vitamins, minerals and other compounds, is an essential micronutrient. This means that our bodies cannot ...

#35. Vitamin A Deficiency: Causes, Symptoms, and Treatment

Preformed vitamin A (retinol and retinyl esters) is found in foods from animal sources, including meat and dairy. Provitamin A carotenoids are ...

#36. Vitamin A: Why Do We Need It? - HealthXchange.sg

Vitamin A deficiency is rare in developed countries such as Singapore as vitamin A is easily obtained from food. Rather, the main concern with this ...

#37. Vitamin A Supplement Benefits, Side Effects, Dosage & Uses

What is vitamin A -oral, and how does it work (mechanism of action)?. Oral vitamin A is used to treat vitamin A deficiency. Carotene compounds (found, for ...

#38. What Is Vitamin A Deficiency? - American Academy of ...

Vitamin A is found in many foods, including leafy green vegetables, orange vegetables (carrots, sweet potatoes, pumpkin), eggs, and cantaloupes.

#39. Vitamin A capsules and tablets - Cleveland Clinic

What is this medicine? VITAMIN A (VAHY tuh min A) is a vitamin found in nature. It is added to a healthy diet to prevent or treat low vitamin A levels.

#40. Vitamin A Supplementation | GiveWell

What is vitamin A deficiency? · 1 VAD is most common in the World Health Organization's Africa and South-East Asia Regions. · 2 Infants, children, and pregnant or ...

#41. vitamin A Definition & Meaning - Merriam-Webster

The meaning of VITAMIN A is any of several fat-soluble vitamins (such as retinol) that are found especially in green or orange vegetables (such as carrots ...

#42. Vitamin A | Walgreens

Vitamin A is a nutrient stored in the liver. It plays an important role in vision, immunity, cellular health, and reproduction. Two types of vitamin A are found ...

#43. Vitamin A Deficiency - Medscape Reference

Researchers have since found that vitamins are essential organic compounds that the human body cannot synthesize. Vitamins A, D, K, and E are ...

#44. All About Vitamin A - Its Benefits, Sources and Side Effects

Vitamin A is an essential fat-soluble vitamin present in many different kinds of foods. Vitamin A is present in nature in two different forms:.

#45. Vitamin A Uses, Side Effects & Warnings - Drugs.com

What is vitamin A ? Vitamin A is found in foods such as milk, cheese, eggs, butter, fortified margarine, meat, liver, oily saltwater fish, ...

#46. What You Need to Know About Vitamin A - Unlock Food

Vitamin A is a fat soluble vitamin that is stored in our liver. It contributes to normal growth and development while keeping our eyes, ...

#47. Vitamin a Definition & Meaning | Dictionary.com

Vitamin a definition, a yellow, fat-soluble, solid terpene alcohol, C20H30O, obtained from carotene and occurring in green and yellow vegetables, egg yolk, ...

#48. Vitamin A Deficiency | DermNet NZ

Vitamin A deficiency, Hypovitaminosis A, Retinol deficiency. Authoritative facts from DermNet New Zealand.

#49. Vitamin A | DSM Human Nutrition & Health

Vitamin A is a generic term for a group of fat-soluble compounds related to retinol. The carotenoid 'beta-carotene' is most efficiently converted into ...

#50. Vitamin A - Testing.com

At a Glance. Why Get Tested? To detect vitamin A deficiency or toxicity. When To Get Tested ...

#51. Vitamin A (Retinol) - Vivo.Colostate.edu

Vitamin A and its metabolites play diverse roles in physiology, ranging from incorporation into vision pigments to controlling transcription of a host of ...

#52. Functions, Benefits Of, Foods High In Vitamin A Per Day And ...

In this video I discuss Vitamin A. Some of its functions in the body, foods rich in Vitamin A, some of the effects of deficiency and daily ...

#53. What Is Vitamin A Good For? - Woman's Day

1 It helps keep your eyesight healthy. what is vitamin a good for eyesight · 2 It'll give you glowing skin. · 3 It keeps your immune system in tip ...

#54. Vitamin A: migrant health guide - GOV.UK

Vitamin A deficiency is extremely rare in people born in the UK, but is a serious public health concern in many low income countries, ...

#55. Vitamin A - Canada.ca

Learn to make healthier food choices by using the Nutrition Facts table on prepackaged foods. Vitamin A is found in the Nutrition Facts ...

#56. Vitamin A - Uses - Kaiser Permanente

The fat malabsorption associated with cystic fibrosis often leads to a deficiency of fat-soluble vitamins, such as vitamin A. Supplementing with this vitamin ...

#57. What Does Vitamin A Do? - Healthy Eating

But unlike some water-soluble vitamins, such as vitamin C and the B vitamins, too much vitamin A can have an adverse effect on the body. A registered dietitian ...

#58. 7 Vital Benefits of Vitamin A and How to Get the Right Amount

The kind found in plant-based foods like fruits and vegetables is called ​provitamin A​. Several dietary supplements provide vitamin A in either form or in a ...

#59. Vitamins & Minerals: What is Vitamin A? | Centrum

Vitamin A is a broad term for a group of related compounds such as retinol and retinoic acid that perform an array of functions. Best known for supporting ...

#60. Vitamin A Supplements, Pills, & Tablets | CVS Pharmacy

Browse Vitamin A Supplements, pills & tablets at CVS Pharmacy & learn about the health benefits and more. Shop a wide variety of Vitamin A products today, ...

#61. Facts About Vitamin A | Vitamins & Supplements - Dr. Weil

Vitamin A plays a vital role in bone growth, maintaining the immune systems, and preserving healthy vision. How much do you need?

#62. The Health Benefits of Vitamin A Palmitate - Verywell Fit

Vitamin A palmitate, also known as retinyl palmitate, plays an important role in vision and skin health. Learn more about the benefits and ...

#63. What Does Vitamin A Do For Your Skin

Vitamin A is a phenomenal molecule that is known to deliver a number of incredible benefits to skin. See how to counter vitamin A ...

#64. Vitamin A supplements: Is your kid getting too much A?

Vitamin A supplements are helpful if kids are deficient. But healthy, well-nourished children don't need supplements, & too much can be a bad thing.

#65. Beta-Carotene or Provitamin A | Louis Bonduelle Foundation

Beta-carotene is a precursor to vitamin A. It is also a powerful antioxidant and an important subject of study in the fight against cancer.

#66. vitamin A | meaning in the Cambridge English Dictionary

a vitamin found in foods such as butter, egg yolk, milk, and fish oils, or produced in the body from the carotene in green vegetables with a ...

#67. Vitamin A Benefits and Orange Juice - Florida Department of ...

Vitamin A is important for reproduction, growth and development, health of cells that line all surfaces of the body, gene expression, immune system function, ...

#68. Vitamin A Benefits that will Dramatically Improve Your Health

Vitamin A is a powerful antioxidant. As it moves through your body it scavenges damaging free radicals and fights inflammation. Vitamin A benefits are wide ...

#69. Vitamin A Supplementation | Nutrition - World Vision ...

Vitamin A is essential for child survival, health, growth and development. Vitamin A deficiency is also the leading cause of preventable childhood blindness ...

#70. Vitamins and minerals - Vitamin A - HSE.ie

helping your body's natural defence against illness and infection (the immune system) to work properly · helping your vision in dim light · keeping your skin and ...

#71. Vitamin A - Nutrition International

Vitamin A helps boost immunity and protects children under five from preventable diseases and blindness. Supplementing children under five with two doses of ...

#72. Vitamin A | Winchester Hospital

Vitamin A. salad spinach eating pregnancy Vitamin A, also called retinol, is a fat-soluble vitamin. Our bodies store fat-soluble vitamins in the liver and ...

#73. Learn About Your Vitamins and Minerals: Vitamin A and Iron

Vitamin A is a group name of fat-soluble vitamins which are vital for reproduction, vision, immune function, genetic activities, skin health, and cell growth.

#74. The ABCs of vitamins – Vitamin A - Life Care Centers of America

Vitamins and minerals are essential to a healthy, functional body, but many times we are unaware of the role each one plays.

#75. Vitamin A - Micronutrients – CCEA - GCSE Home Economics

The body needs vitamin A for: healthy eyesight; healthy skin; healthy immune system; normal growth and development; antioxidant properties, helping protect the ...

#76. Vitamin A Capsules - Medicine - NPS MedicineWise

All medicines have risks and benefits. Your doctor has weighed the risks of you taking Vitamin A Capsules against the benefits they expect it will have for you.

#77. Vitamin A | Memorial Sloan Kettering Cancer Center

Tell your healthcare providers about any dietary supplements you're taking, such as herbs, vitamins, minerals, and natural or home remedies.

#78. 14 Best Vitamin A Foods: Carrots, Sweet Potatoes and More

What is vitamin A and what does it do? Vitamin A is a fat-soluble vitamin that affects eye health, immunity, reproduction and organ function.

#79. Vitamin A in banana | Improving the understanding of banana

Retinol, also known as preformed vitamin A, is the main form of vitamin A absorbed when eating foods of animal origin. Plants, however, do not ...

#80. 11 Foods High In Vitamin A for Healthy Eyes and Skin - The ...

For example, vitamin A also reduces inflammation, keeps skin cells healthy, helps prevent cancer, bolsters the function of the immune system, ...

#81. Best Sellers in Vitamin A Supplements - Amazon.com

Discover the best Vitamin A Supplements in Best Sellers. Find the top 100 most popular items in Amazon Health & Household Best Sellers.

#82. Common Multivitamins Contain Too Much Vitamin A?

THE FACTS Many people take daily multivitamins to improve and maintain good health. Vitamin A, found in many dietary supplements, ...

#83. Vitamin A Benefits, Sources And Its Side Effects | Lybrate

Vitamin A is a fat-soluble vitamin that has antioxidants and found in fruits, vegetables, meat and dairy products. It enhances the vision, supports the immune ...

#84. Vitamin A - Susan G. Komen®

What is it? Vitamin A is a fat-soluble vitamin. It can be found in many fruits, vegetables, eggs, whole milk, butter, fortified margarine, meat, ...

#85. VITA - Overview: Vitamin A, Serum - Mayo Clinic Laboratories

Together with certain carotenoids, vitamin A enhances immune function, reducing the consequences of some infectious diseases. Degenerative changes in eyes and ...

#86. Vitamin A for Skin: Benefits and How to Use - Byrdie

Let's cut right to the chase: Vitamin A is widely considered to be the most beloved hero ingredient in all of dermatology.

#87. Teratogenicity of High Vitamin A Intake | NEJM

Background Studies in animals indicate that natural forms of vitamin A are teratogenic. Synthetic retinoids chemically similar to vitamin A ...

#88. Vitamin A: β-Carotene - Chemistry LibreTexts

Vitamin A : β-Carotene ... β-carotene is the molecule that gives carrots, sweet potatoes, squash, and other yellow or orange vegetables their ...

#89. Eye Benefits of Vitamin A and Beta-Carotene - All About Vision

Can a vitamin A deficiency cause blindness? Dr. Heiting gives the facts about vitamin A and beta-carotene, including vitamin A eye drops.

#90. Vitamin A for diarrhea | Cochrane Equity

Vitamin A deficiency is more common in developing countries. Vitamin A supplements reduce child deaths and measles among disadvantaged children.

#91. Vitamin A - Lab Tests Online-UK

Vitamin A is an essential nutrient required for healthy vision, skin growth and integrity, bone formation, immune function, and embryonic ...

#92. vitamin A (oral/injection) Uses, Side Effects, Dosage ...

Drug Information on vitamin A (oral/injection) includes side effects, uses, drug interactions, dosage, drug pictures, overdose symptoms, ...

#93. What Vitamin A Does for Skin: Plus, How to Use It - Greatist

You've heard about vitamin E and vitamin C, but let's chat about our pal vitamin A. The nutrient is touted as a fix for wrinkles, acne, ...

#94. Vitamin A - Frequently Asked Questions and Answers - Medifee

Gastro-intestinal defects leading to malabsorption of vitamins, can cause Secondary Vitamin A deficiency. Vitamin A is a fat soluble vitamin, so a low-fat diet ...

#95. Vitamin A: An Important Winter Nutrient | UNL Beef

Including vitamin A in a mineral mix is a common and effective method of ensuring cattle get the vitamin A they need. Nutrient for health, reproduction, and ...

#96. Vitamin A Use Today and Its Potential Toxicities | Consultant360

Deficiency of vitamin A is rare in the United States, yet many people take supplemental vitamins that contain vitamin A to prophylactically manage what ...

#97. Skin Care: Here's Why Vitamin A Is Essential For Your Skin

We often forget that certain vitamins and minerals are important for maintaining our skin health. It is said that vitamins are essential for ...