Trust scores are based on third-party testing frequency, certifications (NSF, USP, IFOS, Informed Sport), manufacturing transparency, and regulatory history. We receive no payment from brands for inclusion. Affiliate links are clearly marked.
USP Verified across multiple categories. 95%+ pass rate.
Professional-strength omega-3s. IFOS 5-Star certified.
Every batch tested
Every batch tested
Psyllium Whole Husk passed. Top Pick overall. Lowest lead of any psyllium tested.
Practitioner-grade brand with consistent quality across product lines.
Nordic Naturals practitioner line. Same quality as consumer line.
Every batch tested
Independent lab testing on every lot. Practitioner-grade.
Practitioner-only brand with rigorous testing protocols.
Every batch tested
Coleus Forskolii passed. Top Pick in forskolin category. Clinically tested 25 mg dose at $0.33/capsule.
Passed. Top Pick for natural vitamin E with mixed tocopherols. 268 mg active + 513 mg mixed tocopherols.
Multiple products passed. Vitamin K1 Top Pick. Vitamin A also passed.
Multiple products passed. Vitamin K2 Top Pick. Vitamin A also passed.
AREDS2 Classic passed. Top Pick for AREDS2 formula. Safe zinc dose (25 mg).
Triple Carotenoid Formula passed. Includes unique meso-zeaxanthin. NSF Certified for Sport.
Both syrup and tablets passed. Top Pick as most similar to clinically tested formula.
Whole-food based supplements. Vertically integrated farm-to-tablet.
Practitioner-exclusive brand. Third-party tested.
NOW Foods practitioner line. Same quality standards.
Total Control passed. Top Pick in stimulant blend category. Safe caffeine level (82 mg/tablet).
Passed. Top Pick for very high dose vitamin C. Non-acidic calcium ascorbate form.
Organic Acerola Powder passed. Top Pick for natural powder vitamin C.
Vitamin E Moisturizing Creme passed. Top Pick for topical vitamin E.
Cold Remedy lozenges passed. Top Pick for zinc lozenges for colds.
Digest passed. Top Pick for fat digestion. Highest lipase at 8,174 FIP.
Elite-Zyme Pro passed. Top Pick for protein digestion. Highest protease at 159,726 HUT.
Methylcellulose Caplets passed. Top Pick for methylcellulose. No heavy metal concern.
Wide availability. Initially disputed then clarified.
Most products tested
Most products tested
Select products tested
High-potency medical probiotic. Clinically studied formulation.
Full label transparency. Third-party tested every batch.
Triflex passed. NSF certified products.
Store brand with decent pass rate.
Multiple products passed. Digestive Enzymes Top Pick. Vitamin E and K2 also passed.
Multiple products passed. Chelated Zinc Glycinate Top Pick. Elderberry also passed.
Saccharomyces boulardii CNCM I-745. Clinically studied probiotic yeast.
Select products tested
Both vitamin K2 products passed. Higher-dose MK-4 + MK-7 formulas.
Both psyllium products passed. Low lead levels.
Clinically studied ingredients. Third-party tested.
Clinically studied Lactobacillus rhamnosus GG strain.
Clinically studied Bifidobacterium 35624 strain. Procter & Gamble brand.
NSF Certified for Sport across product lines. Huberman Lab partnership.
Full label transparency. Third-party tested.
Natural ingredients, transparent labels. Third-party tested.
Informed Sport certified. Third-party tested.
Informed Sport certified. One of the most tested protein brands.
Uses fruiting body extracts. Beta-glucan tested.
Select products tested
Multiple products passed across vitamin C, E, A, selenium categories.
Select products tested
Select products tested
Multiple products passed across categories. Vegan vitamin E passed.
Chewable Vitamin C passed. Good value at $0.06/500mg.
Camu Camu Powder passed.
E Complex passed. High tocopherol content.
Multiple products passed across vitamin E and lutein categories.
Multiple products passed across selenium and cod liver oil categories.
Selenium Solution passed. Hypoallergenic liquid form.
Multiple products passed across selenium and elderberry categories.
Vitamin D + K2 passed. MK-4 + MK-7 combo.
Organic Psyllium Husk Powder passed. Cheapest powder option.
Valerian (timed release) passed. 4.2 mg valerenic acids per tablet.
Multi Carotene passed. Natural beta-carotene from algae. NSF Certified.
Plant-based whole food supplements. Third-party tested.
Now part of Nature's Way. Good testing history.
Probiotics and digestive health. Third-party tested.
DS-01 synbiotic. Published clinical trials.
Organic protein and nutrition. USDA Organic certified.
Informed Sport certified protein. Third-party tested.
Informed Sport certified electrolytes.
Transparent electrolyte formula. Third-party tested.
Medical-grade ORS formula. Third-party tested.
Topical magnesium. Genuine Zechstein source.
Systemic enzyme formula. Clinically studied.
Clinically studied ingredients. Terry Lemerond brand.
Select products tested
Select products tested. Boswellia Top Pick. KSM-66 ashwagandha failed.
Select products tested
Transparent labeling. Mixed contamination results.
Vegan Glucosamine MSM & Chondroitin passed.
Crystals passed testing.
Vinali capsules passed. NSF Contents Certified.
Lutein 25 mg passed. Cheapest lutein at $0.03/10mg.
Valerian Root passed. 1.8 mg valerenic acids per capsule. Cheapest per capsule.
Food-based multivitamins. Acquired by Clorox.
Third-party tested. Transparent labeling.
Established brand. Known for melatonin products.
Kosher certified supplements. Third-party tested.
Third-party tested. Transparent dosing.
Known for probiotics. Third-party tested.
Personalized vitamin packs. Nestla Health Science brand.
Personalized vitamin packs. Third-party tested.
Transparent formulas. Third-party tested.
NSF Certified for Sport on some products.
Transparent labels. Third-party tested.
Hydration multiplier. Unilever brand.
Plant-based protein. Third-party tested.
Paul Stamets mushroom supplements. Organic certified.
Third-party tested. Transparent labels.
Condition-specific formulas. Third-party tested.
Mineral supplements from Great Salt Lake. Third-party tested.
Most products tested
Advanced joint formula passed. Contains ApresFlex Boswellia, UC-II collagen, and turmeric.
Joint Health Plus passed testing.
Tall 10+ passed. Includes calcium + D3 + proprietary blend.
Lutein & Zeaxanthin Gummies passed.
Organics Valerian Root passed but low dose and very expensive.
Elderberry gummies passed. Very low anthocyanosides (0.02 mg).
Premium Elderberry Gummies passed. Near-zero anthocyanosides.
NaturesPlus whole-food multivitamin line.
GMP certified facility. Third-party tested.
Budget brand with USP verification on some products.
Budget brand with GMP certification.
Liquid soft-gel format. GMP certified.
Greens powders with organic certifications.
Third-party tested. Known for Magnesium Breakthrough.
Third-party tested raw ingredients. No proprietary blends.
GMP certified. Third-party tested.
Pharmaceutical company. Owns One A Day brand.
Glanbia brand. GMP certified.
Iovate brand. GMP certified.
Clean ingredient profile. Third-party tested.
NSF Certified for Sport on some products.
Functional mushroom brand. USDA Organic.
Most products tested. ArthroMax Top Pick. Ashwagandha failed TWICE.
Internal testing
Internal testing
Mixed results. 'Doctor recommended' brand with premium prices and below-label products.
Select products
Cheapest brand but inconsistent quality control.
Limited
Digest Gold passed but amylase at 155% of claimed, exceeding tolerable limit.
Limited
See MaryRuth's entry. Same brand.
Internal only
Limited
Mixed results. Boswellin failed but vitamin C chewable passed and earned Top Pick.
Passed quality testing but magnesium exceeds upper limit at suggested dose.
Conditional pass. Lead exceeds limits at 3+ servings/day.
Mushroom-based supplements. Some third-party testing.
Internal only
Limited
Mixed results. Vitamin C passed but vitamin E failed (88.1% of claimed active E).
Adaptogen blends with limited clinical evidence.
Amazon-popular brand with limited published testing data.
Amazon #1 turmeric failed lab accuracy test.
Mixed results across categories. Joint product failed, selenium passed.
Conditional pass. Lead exceeds limits at 2+ servings/day.
Amazon brand with limited testing data.
Limited published testing data.
None published
Mixed results. Joint Formula passed but eye support failed with 157% lutein overdose.
Mixed results. Valerian failed (low potency + lead). Elderberry passed.
None published
Mixed results. Valerian product functionally empty.
PreserVision passed quality testing but NOT recommended due to excessive zinc.
Unknown
Independent testing found lead contamination
See AG1 entry. Rebranded to AG1.
Failed independent testing
Independent testing found below-label ingredients
Independent testing found contamination
Independent testing found product failed content claims
Independent testing found product failed content claims
Independent testing found below-detectable protease activity
Unable to approve. Homeopathic labeling circumvents supplement transparency.
None
Independent testing found dangerous overdose levels
Independent testing found near-empty pills
Company-funded study showed negative results
FTC investigated
Independent testing found banned substances
Independent testing found near-empty pills
Independent testing found dangerous lead contamination
Independent testing found near-empty capsules
Independent testing found near-empty capsules
Independent testing found near-empty capsules
Independent testing found near-empty capsules
Independent testing found near-empty capsules
Independent testing found near-empty capsules
Independent testing found near-empty pills
Independent testing found product essentially empty
Independent testing found zero active ingredients
Independent testing found zero active ingredients
Independent testing found zero active ingredients
Independent testing found zero active ingredients
Trust scores reflect publicly available data as of April 2026. Brands may update testing practices. Affiliate links are marked. Scan Dose is not affiliated with any supplement brand. This is not medical advice.