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    Glossary vitamin A

    fat-soluble nutrient crucial for vision, immunity, and skin health

    Vitamin A is a fat-soluble nutrient essential for maintaining healthy vision, immune function, and skin health. It exists in two primary forms: retinoids (found in animal products) and carotenoids (found in plant-based foods). Deficiency in vitamin A can lead to vision problems, including night blindness, and can compromise the immune system.

    Related Terms

    Learn 10 of 26

    1. vitamin A
    2. Vitamin C
    3. Vitamin B5
    4. Vitamin B12
    5. Calcium D oantothenate
    6. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    7. Tretinoin Vitamin A retinoid cream, prescribed for acne
    8. Biotin B vitamin, often sold as a hair supplement
    9. Mesotherapy Injections of drug or vitamin mixtures into the scalp
    10. Dexpanthenol Provitamin B5, a moisturiser in hair and skin products
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    Community 10 of 905

    1. can topical retinol ( vitamin A ) affect hair / hairloss ??? Reddit · 27 Nov 2022
    2. 4 months difference after taking D3 vitamin pills and Anti hair fall shampoo only Reddit · 7 Aug 2024
    3. Rare case: AGA recovery with vitamin D alone (case study) Reddit · 21 Mar 2026
    4. Does anyone have a list of vitamins that could help alongside dut and min? Reddit · 17 Feb 2026
    5. After the blood test I saw I had a severe Vitamin D deficiency.I had androgenic alopecia so I started with minoxidil and finesteride topically along with vitamin D and biotin. Reddit · 3 Jan 2026
    6. Hey guys, I checked my vitamin D and it’s sufficient, but I’m still losing my hair all over. What will be the issue ? Also can I take 60k vitamin D tablets in a week? 25 M Reddit · 24 Aug 2025
    7. Vitamin D deficiency strongly correlates with androgenic alopecia, FMPH and telogen effluvium Reddit · 24 Sept 2024
    8. Why are there no studies on Topical Vitamin D3 for AGA? Reddit · 14 Apr 2024
    9. Why do people downplay vitamin deficiency when 94% of Americans are vitamin D deficient? Reddit · 18 Dec 2023
    10. Thoughts on topical vitamin C (added to shampoo, or a serum) effecting hair growth, thickness etc? Reddit · 11 Sept 2023
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    Research 10 of 1000+

    1. Vitamin D receptor: molecular signaling and actions of nutritional ligands in disease prevention Nutrition reviews · 2008 · 271 citations
    2. Vitamin D and the skin: Focus on a complex relationship: A review Journal of Advanced Research · 2014 · 139 citations
    3. The Role of Vitamins and Minerals in Hair Loss: A Review Dermatology and Therapy · 2018 · 134 citations
    4. Glandular metaplasia of hair follicles and other responses to vitamin A excess in cultures of rodent skin Development · 1968 · 77 citations
    5. Case Report Vitamin A Toxicity and Hypercalcemia ˜The œAmerican journal of the medical sciences · 1982 · 52 citations
    6. Modulatory role of vitamins A, B3, C, D, and E on skin health, immunity, microbiome, and diseases Pharmacological Reports · 2023 · 47 citations
    7. 'Atrophic telogen effluvium' from cytotoxic drugs and a randomized controlled trial to investigate the possible protective effect of pretreatment with a topical vitamin D3 analogue in humans British Journal of Dermatology · 2005 · 47 citations
    8. Penetration and Local Effect of Vitamin A on the Skin of the Guinea Pig., Experimental Biology and Medicine · 1954 · 45 citations
    9. The use of a retinoid receptor antagonist in a new model to study vitamin A-dependent developmental events. PubMed · 1998 · 44 citations
    10. Safety of High-Dose Vitamin A Oncology · 2009 · 39 citations
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