Everything DoseRank tracks on the health shelf — Zinc Bisglycinate. The category itself is never ranked: 1.7k 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 health 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 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Zinc statusBiochemical sufficiency of zinc.428 rankedStrong
Common cold durationLength of cold episodes.711 rankedModerate-strong
Common cold incidenceFrequency of upper respiratory infections resembling the common cold.671 rankedModerate-strong
All-cause mortalityDeath from any cause; lowest-level hard clinical outcome.495 rankedModerate-strong
Iron statusOverall iron sufficiency and availability.616 rankedStrong
Vitamin C statusBiochemical sufficiency of ascorbic acid.521 rankedStrong
Digestive comfortSubjective ease and comfort of digestion.635 rankedModerate-strong
Uric acidPurine metabolism marker associated with gout and cardiometabolic risk.529 rankedModerate-strong
Vitamin A statusBiochemical sufficiency of retinoids or carotenoid-derived vitamin A.320 rankedStrong
Vitamin D statusBiochemical sufficiency of vitamin D.623 rankedStrong
Fall riskLikelihood of falling due to instability or weakness.494 rankedModerate-strong
Gas or flatulenceExcess intestinal gas symptoms.951 rankedModerate-strong
Antioxidant capacityMeasured ability to counter oxidative stress.883 rankedStrong
Vitamin B6 statusBiochemical sufficiency of pyridoxine-related compounds.354 rankedStrong
ConstipationInfrequent, difficult, or hard bowel movements.1.1k rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best health supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 1.7k products against that goal's trials.