Vitamin A is the name given to a group of fat-soluble retinoids. It is an essential vitamin for maintaining healthy vision, fertility, supporting immune functions, and the formation and maintenance of the heart, lungs, kidneys, and other organs. Vitamin A can also act as a hormone within the body. The main types of Vitamin A include:<br />Preformed Vitamin A (retinol and retinyl esters), obtained from animal sources.<br />Provitamin A carotenoids, with beta-carotene being the most important, obtained from plant sources.<br />Sources of Vitamin A<br />Vitamin A can be obtained from both animal and plant sources. Foods rich in natural vitamin A include:<br /><br />Fortified breakfast cereals<br /><br />Orange and yellow vegetables and fruits such as pumpkin, carrots, squash, red peppers, and sweet potatoes<br /><br />Fish oil<br /><br />Eggs<br />Liver<br />Legumes, especially lentils and beans<br />Milk and cheese<br />Dark green leafy vegetables like spinach and broccoli<br />Organ meats such as liver<br />Fatty fish like tuna<br />Health Benefits of Vitamin A<br />Vitamin A offers numerous health benefits, including:<br />Diabetes management: Retinoic acid, derived from vitamin A, helps regulate blood sugar levels.<br />Cancer prevention: Adequate intake of vitamin A from plant sources is linked to a lower risk of cancers such as colon cancer; however, beta-carotene supplements have not shown the same effect.<br /><br />Eye health: Vitamin A is vital for protecting against night blindness and age-related macular degeneration (AMD), a leading cause of vision loss. Antioxidant carotenoids may help prevent oxidative stress involved in AMD.<br /><br />Reducing measles symptoms: Measles is a leading cause of death in developing countries; vitamin A deficiency increases disease severity. Vitamin A supplementation is recommended for children over one year old in affected areas.<br /><br />Skin health: Vitamin A boosts natural oil production, keeping skin and hair moisturized, helps reduce acne by regulating oil secretion, and prevents follicular hyperkeratosis (thickening and dryness of the skin).<br /><br />Immune function: Vitamin A strengthens immune barriers in the eyes, lungs, intestines, and reproductive organs and aids white blood cell production.<br /><br />Bone health: It is essential for bone growth and maintenance, especially with aging.<br /><br />Growth and reproduction: Vitamin A supports reproductive health in both men and women and promotes normal fetal development during pregnancy. However, excessive intake during pregnancy may cause birth defects.<br />Risks of Vitamin A Deficiency<br />Vitamin A deficiency can affect various body functions, leading to:<br />Increased risk of infections, especially respiratory and gastrointestinal.<br />Fertility issues.<br />Delayed growth in children.<br />Night blindness.<br />Follicular hyperkeratosis (dry, thickened skin).<br />Higher risk of bone fractures.<br />Recommended Daily Intake of Vitamin A<br />Vitamin A daily requirements vary by age and condition:<br />Adults (14+ years):<br />Females: 700 mcg/day (1,300 mcg/day during pregnancy and breastfeeding)<br />Males: 900 mcg/day<br />Children:<br />1–3 years: 300 mcg/day<br />4–8 years: 400 mcg/day<br />9–13 years: 600 mcg/day<br />Infants:<br />0–6 months: 400 mcg/day<br />7–12 months: 500 mcg/day<br />Groups at Risk of Vitamin A Deficiency<br /><br />Infants and young children in developing countries: Breast milk often lacks sufficient vitamin A for infants in the first six months, and deficient mothers produce low-vitamin-A milk, necessitating supplementation.<br />Premature infants: They have low liver vitamin A stores at birth, increasing risk of chronic lung, eye, and digestive diseases.<br />People with cystic fibrosis: Due to pancreatic insufficiency, they have difficulty absorbing fats and vitamin A, but symptoms can be managed with treatment and supplements.<br />Pregnant and breastfeeding women in developing countries: They need higher vitamin A levels for fetal growth and metabolic support; deficiency leads to increased disease risk and mortality.<br />Risks of Vitamin A Overconsumption<br />Excess vitamin A can be toxic and may cause:<br />Brittle nails<br />Hair loss<br />Vision changes, including double vision in young children<br />Increased scalp oiliness<br />Birth defects in pregnant women<br />Vomiting<br />Soft spots in infants’ skulls<br />Drowsiness and fatigue<br />Nausea<br />Skin changes such as cracking, yellowing, itching, and sun sensitivity<br />Liver damage<br />Headaches<br />Gum disease<br />Loss of appetite<br />Dizziness<br />Difficulty gaining weight<br />Bulging fontanelle in infants<br />Certain acne medications like isotretinoin are vitamin A derivatives; people using these should avoid excess vitamin A intake. Generally, a healthy diet provides adequate vitamin A, so supplements are usually unnecessary<br />Al-Mustaqbal University The First University In Iraq<br/><br/><a href=https://search.app/GjPqbF3KRHXtzHE3A target=_blank>Goal 3 of the Sustainable Development Goals: Good Health and Well-being</a>