Knowledge Tree
vitamin A
Facts (35)
Sources
Immunity In Depth | Linus Pauling Institute lpi.oregonstate.edu 14 facts
claimVitamin A derivatives, specifically isomers of retinoic acid, carry out most of the immune effects attributed to vitamin A.
referenceMora JR, Iwata M, and von Andrian UH published 'Vitamin effects on the immune system: vitamins A and D take centre stage' in Nature Reviews Immunology in 2008 (volume 8, issue 9, pages 685-698), which reviews the effects of vitamins A and D on the immune system.
claimProtein-energy malnutrition (PEM) usually occurs in combination with deficiencies in essential micronutrients, specifically vitamin A, vitamin B6, folate, vitamin E, zinc, iron, copper, and selenium.
claimDeficiencies or inadequacies of B vitamins and vitamins A, C, D, and E have been associated with obesity.
referenceRichard D. Semba wrote a chapter on Vitamin A in the 2004 book 'Diet and Human Immune Function', edited by Hughes DA, Darlington LG, and Bendich A, and published by Humana Press Inc.
claimVitamin A is necessary for the normal function of innate immune cells, specifically natural killer (NK) cells, macrophages, and neutrophils.
claimVitamin A is required for the proper function of T and B lymphocytes, which mediate adaptive immunity, and is necessary for generating antibody responses to specific antigens.
referenceCharles B. Stephensen published a review on Vitamin A, infection, and immune function in the Annual Review of Nutrition in 2001.
claimVitamin A is essential for maintaining the mucosal barriers of the innate immune system.
claimThe most effective dose and frequency of supplemental vitamin A delivery for children older than 6 months in low- and middle-income countries remains a subject of debate.
claimVitamin A depletion and repletion affect the antibody response to the capsular polysaccharide of Streptococcus pneumoniae, type III (SSS-III), according to a 1989 study by Pasatiempo et al. published in the American Journal of Clinical Nutrition.
claimVitamin A helps maintain the structural and functional integrity of skin and mucosal cells in the eye, respiratory, gastrointestinal, and genitourinary tracts, which serve as barriers against infection.
claimVitamin A acts as a key regulator for cell growth, cytokine production, and differentiation in normal B cells, according to a 1992 study by Blomhoff et al. published in the Journal of Biological Chemistry.
measurementAccording to the US National Health and Nutrition Examination Survey (NHANES), 93% of the US adult population does not meet the estimated average requirement (EAR) for vitamin E, 56% for magnesium, 44% for vitamin A, 31% for vitamin C, 14% for vitamin B6, and 12% for zinc.
Nutritional potential of underutilized edible plant species in coffee ... link.springer.com Apr 23, 2021 4 facts
claimDiets in rural Ethiopia are often deficient in protein and micronutrients such as iron (Fe), calcium (Ca), and vitamin A, according to Sheehy et al. (2019) and Baye et al. (2019).
referenceThe National Institute of Health (NIH) published a fact sheet for health professionals regarding Vitamin A in 2018.
measurementRumex apetalus has the highest beta-carotene content among the studied species at 161.67 µg RAE/100 g fresh edible portion, which is estimated to provide nearly 50% of the daily recommended vitamin A for children, 23% for female adults, and 21% for pregnant women per 100 g of fresh leaves.
measurementAmaranthus graecizans contains 75 µg RAE/100 g of edible portion of vitamin A, which contributes 20% of the recommended intake for children, 13% for females, and 11% for pregnant women, according to NIH (2018).
Phytochemical and Pharmacological Studies of Traditionally Used ... heraldopenaccess.us 4 facts
measurementThe vitamin content per 100g fresh weight of Ocimum basilicum Linn. includes 264μg vitamin A, 3142μg β-carotene, 34μg thiamin, 76μg riboflavin, 902μg niacin, 209μg panthotenic acid, 155μg vitamin B6, 68μg vitamin B9, 11.4mg choline, 18.0 mg vitamin C, 0.80mg vitamin E, and 414.8μg vitamin K.
claimThe herb Ocimum basilicum Linn. contains fats, proteins, and vitamins including C, E, K, A, B-carotene, B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6, B9, and choline.
measurementThe leaves of the plant studied contain 6.04 mg of vitamin A (B-carotene) per 100 grams.
referenceMurraya koenigii (L.) Spreng. contains essential oil and vitamin A, which protect the eyes and improve eyesight, as reported by Chaudhary et al.
History of modern nutrition science—implications for current ... bmj.com Jun 13, 2018 4 facts
claimThe global community prioritized the elimination of hunger and micronutrient deficiency in lower-income nations, specifically targeting iron, vitamin A, and iodine.
claimIn lower-income countries, vitamin supplementation presents specific risks, including potential harms from high-dose vitamin A, the risk of iron exacerbating infections like malaria, and safety concerns regarding folic acid flour fortification potentially worsening neurological and cognitive deficits in individuals with low vitamin B12 levels.
claimVitamin A supplementation was identified as a method to prevent child mortality from infections like measles, as well as preventing night blindness and xerophthalmia.
procedureThe World Health Organization (WHO) recommended widespread micronutrient supplementation during pregnancy (specifically iron and vitamin A) and the fortification of salt with iodine to prevent goitre, congenital hypothyroidism, and hearing loss.
Comparison of Traditional Indigenous Diet and Modern Industrial ... isom.ca Feb 26, 2024 2 facts
claimThe traditional Inuit diet provided high levels of vitamin A and D through the consumption of liver organ meats, seal oil, whale blubber, and fish eyes and eggs.
claimThe processed diet consumed by some residents of Bethel, Alaska, consisted of white flour, white sugar, canned goods, coffee, and tea, and was inherently lacking in trace minerals and vitamins A, D, and C.
Western Diet: How it affects health, risks, and complications medicalnewstoday.com Oct 27, 2023 2 facts
claimThe Standard American Diet (SAD) provides inadequate levels of micronutrients, which may lead to deficiencies in zinc and Vitamins A, C, D, and E.
measurementIn the U.S. population, the percentage of people with inadequate levels of key immune-related micronutrients is 45% for Vitamin A, 46% for Vitamin C, 95% for Vitamin D, 84% for Vitamin E, and 15% for Zinc.
Assessment of the nutritional value of a wild edible plant Scorzonera ... discovery.researcher.life Dec 1, 2025 1 fact
claimWild edible plants serve as sources of carbohydrates, proteins, and fibers, and are rich in vitamins and minerals including vitamin A, vitamin C, zinc, iron, calcium, iodine, thiamine, riboflavin, niacin, and folate.
Editorial: Dietary diversity indicators: cultural preferences and health ... frontiersin.org 1 fact
measurementResearchers in the Mt. Cameroon Health Region found that maternal mean hemoglobin levels were significantly higher (P < 0.001) in women consuming heme iron (11.08 ± 1.35 g/dL) and vitamin A food groups (11.34 ± 1.30 g/dL) compared to those not consuming these groups (10.54 ± 1.19 g/dL and 10.74 ± 1.31 g/dL, respectively).
What Is Inflammation? Types, Causes & Treatment my.clevelandclinic.org Mar 22, 2024 1 fact
referenceThe study "Vitamin A and Wound Healing" by Zinder R, Cooley R, Vlad LG, Molnar JA, published in Nutrition in Clinical Practice in 2019, examines the role of Vitamin A in the wound healing process.
Ethnobotanical and Food Composition Monographs of Selected ... ouci.dntb.gov.ua 1 fact
referenceAliotta and Pollio (1981) measured the Vitamin A and C content in several edible wild plants in Italy.
Diet composition and staple-food dependence as structural ... researchsquare.com 1 fact
claimDietary reliance on a limited variety of plant-based foods may lead to deficiencies in iron, zinc, vitamin A, B12, and omega-3 fatty acids, which are nutrients more readily available in animal-sourced foods.