Everything DoseRank tracks on the vitamin a & d shelf — Retinyl Palmitate. The category itself is never ranked: 40 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing vitamin a & d supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 29 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Night vision or dark adaptationAbility to see or adapt under low-light conditions.38 rankedStrong
Vitamin A statusBiochemical sufficiency of retinoids or carotenoid-derived vitamin A.40 rankedStrong
Bone turnover markersBiochemical indicators of bone formation and resorption.20 rankedStrong
Vitamin K statusBiochemical sufficiency of vitamin K.20 rankedStrong
Bleeding tendencyExcess susceptibility to bruising or bleeding.12 rankedStrong
All-cause mortalityDeath from any cause; lowest-level hard clinical outcome.34 rankedModerate-strong
Coagulation statusOverall blood clotting tendency.9 rankedStrong
Fall riskLikelihood of falling due to instability or weakness.40 rankedModerate-strong
Vitamin D statusBiochemical sufficiency of vitamin D.40 rankedStrong
Arterial stiffnessReduced elasticity of arteries associated with cardiovascular risk.19 rankedStrong
Vascular functionOverall health and reactivity of the circulatory system.16 rankedModerate-strong
Skin barrier functionProtective integrity of the outer skin barrier.38 rankedModerate-strong
Fracture riskLikelihood of bone fracture.40 rankedStrong
Omega-3 indexRed blood cell EPA+DHA content reflecting omega-3 status.7 rankedStrong
Depressive symptomsLow mood, anhedonia, and related depressive features.40 rankedModerate-strongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best vitamin a & d supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 40 products against that goal's trials.