Compare vitamin a supplement options, forms, and observed retailer prices on Zynava. Filter by preference (form, diet, budget) and open AI-powered search for matching products. This vitamin catalog page is educational comparison only — not medical advice.
Essential nutrient for vision, immune function, and cellular health. Learn about retinol, beta-carotene, and optimal intake.
Explore Vitamin A supplements and browse options based on ingredient research.
Zynava compared 9 vitamin a products across 4 participating retailers. Observed price range in catalog scan: $8.00 – $79.00. 20 listings have verified servings for price-per-serving display.
How ranking works: Results are ordered by your preferences, relevance, observed price, and verified value — never by paid placement. Always confirm the final price on the retailer site.
Compare Vitamin A in search · Catalog page · Educational research guide
Vitamin A is a fat-soluble vitamin essential for numerous biological functions, including vision, immune function, reproduction, and cellular communication. Unlike many vitamins, Vitamin A exists in multiple forms, primarily as preformed vitamin A (retinoids) and provitamin A carotenoids.
Vitamin A plays crucial roles in maintaining health through multiple mechanisms. Its antioxidant properties, particularly from carotenoids, help protect cells from oxidative damage.
Vitamin A is essential for vision, particularly in low-light conditions. The retina contains rhodopsin, a light-sensitive protein that requires vitamin A for proper function. Vitamin A deficiency can lead to night blindness and, in severe cases, complete vision loss.
Vitamin A supports immune system health by maintaining the integrity of mucosal barriers and enhancing immune cell function. It plays a role in both innate and adaptive immunity, helping the body defend against infections and supporting wound healing.
Vitamin A is crucial for skin health and epithelial tissue maintenance. It supports cell differentiation and proliferation, making it important for wound healing and skin barrier function.
Vitamin A is essential for reproductive health in both males and females. It supports sperm production, fetal development, and maintains reproductive tissues.
Carotenoids like beta-carotene provide antioxidant protection, helping to neutralize free radicals and reduce oxidative stress throughout the body.
Vitamin A can be obtained from both animal and plant sources. Animal sources provide preformed vitamin A, while plant sources contain provitamin A carotenoids.
| Food Source | Amount | Vitamin A Content |
|---|---|---|
| Beef Liver | 3 oz (85g) | 6,582 mcg |
| Chicken Liver | 3 oz (85g) | 1,794 mcg |
| Whole Milk | 1 cup (244g) | 149 mcg |
| Cheese | 1 oz (28g) | 68 mcg |
| Egg Yolk | 1 large | 75 mcg |
| Food Source | Amount | Beta-Carotene Content |
|---|---|---|
| Sweet Potato (baked) | 1 medium | 11,520 mcg |
| Carrots (cooked) | 1 cup | 10,191 mcg |
| Spinach (cooked) | 1 cup | 9,370 mcg |
| Kale (cooked) | 1 cup | 8,915 mcg |
| Winter Squash | 1 cup | 5,707 mcg |
The Recommended Dietary Allowance (RDA) for vitamin A varies by age, gender, and life stage. The FDA has established Daily Values for labeling purposes.
| Age Group | RDA (mcg/day) | Upper Limit (mcg/day) |
|---|---|---|
| Infants 0-6 months | 400 | 600 |
| Infants 7-12 months | 500 | 600 |
| Children 1-3 years | 300 | 600 |
| Children 4-8 years | 400 | 900 |
| Children 9-13 years | 600 | 1,700 |
| Males 14+ years | 900 | 2,800 |
| Females 14+ years | 700 | 2,800 |
| Pregnant women | 770 | 2,800 |
| Lactating women | 1,300 | 2,800 |
Vitamin A supplements come in various forms, each with different bioavailability and uses.
Absorption of vitamin A requires fat and bile acids. Supplements should be taken with meals containing fat for optimal absorption. The conversion of beta-carotene to active vitamin A varies between individuals and may be less efficient in some people.
Vitamin A supplements may interact with certain medications, including:
Vitamin A deficiency remains a significant public health concern in many developing countries, affecting millions of children and pregnant women.
Numerous studies have investigated vitamin A's role in health and disease prevention.
Research shows vitamin A supplementation can prevent and treat night blindness. The Age-Related Eye Disease Study (AREDS) demonstrated that antioxidants including beta-carotene may slow progression of age-related macular degeneration in some individuals.
Vitamin A supplementation has been shown to reduce child mortality in developing countries by supporting immune function. Studies indicate it enhances both antibody production and cell-mediated immunity.
Some studies suggest beta-carotene may help prevent certain cancers, though results are mixed. The Alpha-Tocopherol Beta-Carotene (ATBC) study found mixed results for lung cancer prevention.
Note: This section represents a summary of key research findings. Individual results may vary, and supplementation should be discussed with healthcare providers.
When selecting vitamin A supplements, consider these quality indicators:
Start with lower doses and increase gradually. The FDA recommends not exceeding 10,000 IU (3,000 mcg) daily from supplements unless under medical supervision.
Use our research tool to explore Vitamin A supplements and see what studies have examined.
Store vitamin A supplements in a cool, dark place. Keep away from heat and direct sunlight to maintain potency. Check expiration dates regularly.
Zynava lists Vitamin A products from multiple retailers and shows each offer’s observed price from our catalog. You can filter by preferences (form, dietary claims, and more), then compare matching options side by side. We do not sell supplements or invent rankings.
Only when servings per container are verified from label or catalog facts. If servings are unknown or conflicting, we show the observed product price and omit price-per-serving rather than guessing.
Yes. Use Zynava search or Ask Zynava to match preferences such as capsule vs tablet, non-GMO, vegan, and similar catalog filters, then compare observed prices among the products that match.
No. This page helps you compare shopping options and observed prices. It is not medical advice, diagnosis, or a recommendation of what you should take. Talk with a qualified clinician for personal health decisions.