Scores 35/35 for dosage transparency, 25/25 for a clean formula, 21/25 for label completeness. 5 ingredients disclosed with amounts.
capsule · 30 servings · $0.96/servingBuy on iHerb$28.95
Ranking
10 Best Joint Support Supplements
Joint supplements combine some of the most-studied ingredients, glucosamine and chondroitin, with many newer ones, and the doses on labels often fall short of the amounts used in trials. This ranking puts products that state full amounts of each ingredient at the top.
We ranked glucosamine, chondroitin, MSM, boswellia, UC-II collagen and other joint formulas sold on iHerb by label quality.
Our top picks
Scores 30/35 for dosage transparency, 25/25 for a clean formula, 20/25 for label completeness. 4 ingredients disclosed with amounts.
capsule · 30 servings · $1.32/servingBuy on iHerb$39.56
Scores 35/35 for dosage transparency, 25/25 for a clean formula, 23/25 for label completeness. 3 ingredients disclosed with amounts.
capsule · 55 servings · $0.31/servingBuy on iHerb$17.16
Top 10 ranked
#ProductScoreFormServingsPrice
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
- Glucosamine sulfate or hydrochloride
- Most trials used glucosamine sulfate at 1,500 mg a day. The label should name the salt.
- Chondroitin sulfate
- Usually 800–1,200 mg a day in studies; often paired with glucosamine.
- MSM
- A sulfur compound, commonly 1–3 g a day.
- Undenatured type II collagen (UC-II), boswellia
- Low-dose ingredients; boswellia extracts should state their boswellic acid content.
How much to take
Doses from clinical trials, to compare with the label: glucosamine sulfate 1,500 mg, chondroitin sulfate 800–1,200 mg, UC-II 40 mg, MSM 1–3 g per day. Many combination products reach these only at three or more capsules a day.
Who it's for
Adults looking for a joint formula with doses they can compare with research.
What to watch out for
Formulas that list many ingredients at token amounts, glucosamine from shellfish if you have an allergy, and glucosamine with warfarin.
All Joint Support products (3191)
1
NATURELO Premium SupplementsGlucosamine Chondroitin & MSM
892EmeraldUC-II Joint Formula
883Nature's BountyGlucosamine Chondroitin Complex
884Emerald LabsUC-II Joint Formula
885UB Ultra BotanicalsUC-11 Joint Formula
886Osteo Bi-FlexOsteo Bi-Flex One Per Day! Glucosamine HCl & Vitamin D3
877Allergy Research GroupInflaMed
868Evlution NutritionFlexMode
869LifeSeasons TherapeuticsInflamma-X
8610Natural FactorsCherryRich Super Strength Cherry Fruit Extract 36:1
8611Osteo Bi-FlexOsteo Bi-Flex Triple Strength
8412SolgarNo. 7
8413ForestLeafGlucosamine Chondroitin
8414NutricostGlucosamine with Chondroitin & MSM
8415Best NaturalsHyaluronic Acid
8416ThornePhytoprofen
8317Pure EncapsulationsGlucosamine MSM
8318Pure EncapsulationsGlucosamine/MSM
8319Pure EssenceJointEssence
8320KALUric Acid Flush
83Frequently Asked Questions
How much glucosamine should a supplement have?
Most clinical trials used 1,500 mg of glucosamine sulfate per day. A product with a fraction of that per serving is not comparable to those studies.
Is glucosamine from shellfish?
Usually, yes. Vegan glucosamine from corn fermentation exists and should say so on the label.
How are joint support 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 joint support supplements were analyzed?
We analyzed 3,191 joint support 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.