Scores 35/35 for dosage transparency, 25/25 for a clean formula, 21/25 for label completeness. 5 ingredients disclosed with amounts.
capsule · 60 servings · $0.41/servingBuy on iHerb$24.50
Ranking
10 Best Vitamin A, E & K Supplements
Vitamins A, E and K are fat-soluble, and the form on the label matters as much as the amount: vitamin A as retinol or beta-carotene, vitamin E as natural d-alpha or synthetic dl-alpha tocopherol, vitamin K as K1 or K2. A good label names the form and states the amount in current units.
We ranked single vitamin A, vitamin E, tocotrienol and vitamin K products sold on iHerb by label quality. Vitamin D with K2 is in the vitamin D ranking.
Our top picks
Scores 35/35 for dosage transparency, 25/25 for a clean formula, 21/25 for label completeness. 4 ingredients disclosed with amounts.
softgel · 30 servings · $0.70/servingBuy on iHerb$21.15
Scores 35/35 for dosage transparency, 25/25 for a clean formula, 21/25 for label completeness. 5 ingredients disclosed with amounts.
softgel · 60 servings · $0.27/servingBuy on iHerb$15.99
Top 10 ranked
#ProductScoreFormServingsPrice
3
How we ranked them
Every product is scored 0–100 from its label data in the NIH Dietary Supplement Label Database: dosage transparency (35 points - are amounts stated per ingredient, or hidden in a proprietary blend?), label completeness (25), formulation cleanliness (25 - fillers, dyes, titanium dioxide and other non-active ingredients) and ingredient profile (15). The Top 10 admits only products scoring 60 or higher; among those, products with a verified retail listing are shown first so the list is one you can act on. No brand can pay to be included or moved up.
Forms and dosage
- Vitamin A: retinyl palmitate or beta-carotene
- Labels now use mcg RAE; preformed vitamin A has an upper limit, beta-carotene does not.
- Vitamin E: d-alpha vs dl-alpha tocopherol, mixed tocopherols, tocotrienols
- Natural d-alpha is more potent per IU than synthetic dl-alpha.
- Vitamin K: K1 (phylloquinone) or K2 (MK-4, MK-7)
- MK-7 is dosed in micrograms, MK-4 often in milligrams.
How much to take
NIH upper limits for adults: preformed vitamin A 3,000 mcg RAE (10,000 IU), vitamin E 1,000 mg (1,500 IU natural or 1,100 IU synthetic) per day. Vitamin K has no upper limit, but it directly affects warfarin.
Who it's for
Adults with a specific reason to take one of these vitamins, ideally confirmed by a clinician.
What to watch out for
High-dose preformed vitamin A in pregnancy, beta-carotene if you smoke, vitamin E above 400 IU with blood thinners, and any vitamin K change if you take warfarin.
All Vitamins A, E & K products (1517)
1
Garden of Life Vitamin CodeRaw K-Complex
892CarlsonTocomin SupraBio
893Healthy OriginsTocomin SupraBio
894NOWA & D 10,000/400 IU From Fish Liver Oil
885Nature's Plus Source of Life GardenVitamin K2
886Jarrow FormulasToco-Sorb
887Doctor's BestBest Tocotrienols 50 mg
888California Gold NutritionTocotrienol Complex
889CodeageLiquid Vitamin E+
8710Life ExtensionSuper Absorbable Tocotrienols
8611NOWMK-7 Plus with K1 & MK-4
861221st CenturyVitamin A 10,000 IU
8513Jarrow FormulasMK-7 90 mcg
8514NOWVitamin A 10,000 IU From Fish Liver Oil
8515NOWA & D 10,000/400 IU
8516Swanson Premium BrandVitamins A & D
8517Swanson UltraNatural Vitamin K2 100 mcg
8518Swanson UltraMaximum Strength Natural Vitamin K2 200 mcg
8519Nature MadeVitamin K2 100 mcg
8520Life ExtensionLow Dose Vitamin K2 45 mcg
85Frequently Asked Questions
Natural or synthetic vitamin E?
Natural d-alpha tocopherol is more potent per international unit than synthetic dl-alpha. The label should say which one it is.
Can I take vitamin K with warfarin?
Only with your clinician's guidance: vitamin K changes how warfarin works, so the dose must stay consistent.
How are vitamins a, e & k supplements ranked?
Products are ranked by SupplementScore, which evaluates label quality across four categories: dosage transparency (35 pts), label completeness (25 pts), formulation cleanliness (25 pts), and ingredient profile (15 pts). The score is based on data from the NIH Dietary Supplement Label Database, not marketing claims.
Does a higher score mean the supplement is more effective?
No. The SupplementScore measures label quality, how transparent, clean, and well-documented a product is. It does not measure clinical efficacy, bioavailability, or third-party testing. A higher score means better label practices, not guaranteed results.
How many vitamins a, e & k supplements were analyzed?
We analyzed 1,517 vitamins a, e & k products from the NIH DSLD database, which contains label data for over 116,000 dietary supplements sold in the United States.
This article is for information only and is not medical advice. Talk to a clinician before starting a supplement, especially if you are pregnant, take medication or have a health condition.