Fat-soluble vitamin; toxicity concerns at high doses.
Get from diet (liver, eggs, orange vegetables via beta-carotene). Only supplement if diagnosed deficient.
Vitamin A (Vitamin A (retinyl palmitate)) is a foundational with evidence grade A, meaning it is well-supported by replicated human trials. We track 3 products containing Vitamin A. Typical doses range from 0.0708 to 3 mg per serving. The top-ranked product scores 7.6 out of 10 on our composite scale (dose, evidence, price, testing, transparency). Prices range up to $90.00 per month.
| Product | Brand | Dose | Price/mo | 3rd-party tested | Score |
|---|---|---|---|---|---|
| Extra Virgin Cod Liver Oil (Liquid) | Rosita | 3 mg | $47.99 | Yes | 7.6 |
| Seed DM-02 Daily Multivitamin | Seed Health | 0.9 mg | $39.99 | Yes | 6.7 |
| Mosaic | Elysium Health | 0.0708 mg | $90.00 | No | 5.6 |
Scores are editorial judgments, not a scientific standard. See how we score.
Essential for vision, immune function, skin. Overdose (>10,000 IU/day) causes toxicity, especially in pregnancy.
Correcting deficiency important in restricted diets. Casual megadosing dangerous.
Get from diet (liver, eggs, orange vegetables via beta-carotene). Only supplement if diagnosed deficient.
Retinol / retinyl esters.
Teratogenicity above 10,000 IU/day in pregnancy.
Days.
Do not exceed 10,000 IU/day. Pregnancy hazard.
When a product exceeds the UL or contains an ingredient with clinically significant interactions, a "Review advised" flag appears on its product page and links here.
Source: https://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional/
The trial dose above is our editorial pick from the published human trials for this ingredient. We choose the dose that the best-available studies used on the endpoint most relevant to longevity. The range shows the lowest and highest doses tested in published trials. The landmark studies below are the papers we read to set it. You can click through and check our work.
When new trials publish, our automated sweeps flag them. If a new study materially changes the dose, we update it through editorial review and record the old dose, new dose, and the triggering study in every affected product's recommendation history. The dose is never changed automatically.
Regulatory events, evidence grade changes, and key research milestones for Vitamin A, most recent first. Studies link to the paper; regulatory entries name and link the responsible authority.
All products in our catalog that contain Vitamin A, ranked by our overall score. Ranking is editorial, never paid.
Multi-ingredient bundle
Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Seed HealthMulti-ingredient bundle
Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Elysium HealthElemental vs compound: check label
Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Molecules in the same class, plus the actives most often formulated alongside Vitamin A in our catalogue.
See Vitamin A in context: the mechanism it acts through, the biomarker it moves, the products that dose it, and the trials that tested it.
View Vitamin A on the Longevity Map →Essential for vision, immune function, skin. Overdose (>10,000 IU/day) causes toxicity, especially in pregnancy.
The trial dose in published human studies is 0.9 mg per day, with a range of 0.7 to 3 mg per day. Always consult a qualified clinician before starting any supplement.
UL is 3,000 μg RAE/day (3 mg/day) for adults from preformed vitamin A (retinol/retinyl esters). Chronic excess intake is associated with hip fracture, liver toxicity, and teratogenic effects. Beta-carotene is not subject to this UL.
We track 3 products containing Vitamin A. The top-ranked product scores 7.6 out of 10 on our composite scale, which evaluates dose, evidence, price, third-party testing, and transparency. See the comparison table above. Scores are editorial judgments, not a scientific standard.
Vitamin A has evidence grade A, meaning it is well-supported by replicated human trials. Grade A means replicated human RCTs with hard endpoints. Grade B means human RCTs with biomarker outcomes. Grade C means mixed or small human trials. See our evidence grading methodology.
Evidence grades are reviewed when new human RCTs are published. Product counts update automatically as new products are added. Dose ranges reflect published trial data, not brand recommendations. Read how we verify.
Rosita