Nutricost Glucosamine Sulfate 1500 mg Review
#5 of 11 · Cheapest 3-month trial✓ Label verified · Supplement Facts read Oct 18, 2026Real retailer photo, cut out. Label unedited.
Consider it as the cheapest way to run a glucosamine sulfate trial: 1,500 mg in two capsules once a day, about $14 for 90 days. The catch is that the panel prints the KCl salt rather than the studied crystalline sulfate, and the testing claim names no lab.
$18.95 / 240 capsules (120 servings · about $4.74 per 30 days)~$0.16 / 2-capsule serving
Why It Scores 8.2 — And The Label Line Behind Each Number
Form honesty (evidence-graded)
35% of scoreThe panel prints Glucosamine Sulfate KCl, so this is a sulfate and not the HCl form that most US combos use. That puts it in the tier our method ranks second, level in kind with Life Extension (8.5). It scores lower for two reasons. The panel never says crystalline or names the Rotta preparation, which is sodium-chloride stabilised, and the 1,500 mg is the weight of the whole potassium chloride salt rather than of glucosamine alone. It is glucosamine-only by design, as Dona is (10.0), and the evidence frame does not require chondroitin, so that is not marked down.
- Active form
- Glucosamine sulfate KCl (potassium chloride salt), capsule; the panel does not say crystalline
- Per serving
- 2 capsules = Glucosamine Sulfate KCl 1,500 mg (Daily Value not established); no chondroitin, no MSM
Dose alignment with the trials
25% of score1,500 mg once a day in two capsules is the trial-matched daily figure as printed, with the simplest schedule on the list after Dona (9.5). It scores below Dona and Kirkland (9.5) because the figure is the salt weight, not a glucosamine-only amount, and the panel gives no glucosamine-only number. It is level with Life Extension (8.5), which has a near-1,500 mg glucosamine dose plus chondroitin.
- Bottle
- 240 capsules · 120 servings · 120 days at 2 capsules a day
Third-party testing + label accuracy
25% of scoreThe back label says Third Party Tested and nutricost.com says an independent, accredited lab does it, but no lab is named, no certificate of analysis is linked, and neither the NSF Certified for Sport search nor the NSF dietary-supplement listings show Nutricost (checked October 18, 2026). The Amazon listing's NSF Certified facility line is not repeated on the brand's own product page. The label itself is clean and simple, and a single ingredient is easy to get right, but a claim with no paper trail scores level with Nature's Bounty (7.0), well under Kirkland, Doctor's Best and Jarrow (8.0), Life Extension (9.0) and Nature Made (9.5).
- Testing
- Third Party Tested printed on the back label; no lab named; no certificate of analysis found; no Nutricost listing in the NSF Certified for Sport search or NSF dietary-supplement listings (checked October 18, 2026)
- Certifications
- None verified. The gallery tiles also say Non-GMO, Gluten-Free and GMP Compliant Facility; no certifier mark is printed. The Amazon listing says NSF Certified facility; nutricost.com says GMP Compliant, FDA Registered.
Cost per 3-month responder trial
15% of score$18.95 for 120 servings is about $0.16 a serving, about $4.74 per 30 days and about $14.21 for a 90-day trial. That is under half of Kirkland's roughly $40 trial (9.5) and about a sixth of Dona's roughly $90 (6.5), and one bottle covers a 120-day supply with no mid-trial reorder. We give it the top mark because it is the cheapest trial on the list; price is a small share of the total and does not lift it past siblings on the criteria that matter more.
- Price
- $18.95 for 120 servings = about $0.16 per serving = about $4.74 per 30 days = about $14.21 for 90 days (Amazon, checked October 18, 2026)
- More Specs
- Source
- Shellfish (crab, shrimp), stated on the panel
- Inactives
- Gelatin capsule, calcium laurate, magnesium stearate (vegetable source), silica
- Allergen
- Contains: Shellfish (crab, shrimp)
- Manufacturer
- Nutricost, Vineyard, UT; made and quality tested in the USA with globally sourced ingredients
Label verified. Every figure read from the Supplement Facts photo, Oct 18, 2026.
Marketing Claims Vs. Reality
1500mg of Glucosamine Sulfate per serving.
The panel prints Glucosamine Sulfate KCl 1,500 mg per 2 capsules, so the 1,500 mg is real as printed. It is the weight of the potassium chloride salt, not of glucosamine alone, and the panel gives no glucosamine-only amount.
Third Party Tested.
Printed on the back label and repeated on nutricost.com, which says an independent, accredited lab does the testing. No lab is named, no certificate of analysis is linked, and the NSF Certified for Sport search and NSF dietary-supplement listings show no Nutricost entry (searched October 18, 2026).
Manufactured in an NSF Certified, GMP compliant, FDA registered facility.
This is the Amazon listing wording. Nutricost's own product page says only GMP Compliant and FDA Registered, and the bottle prints no NSF mark. We found no NSF listing for Nutricost and the manufacturing site is not named, so the NSF part could not be checked.
Non-GMO and gluten-free.
Both are printed on the back label and in the gallery tiles, but no certifier mark (such as the Non-GMO Project) is shown. Glucosamine from shells has no gluten-containing grain, so the gluten claim is plausible.
What Our Test Actually Found
A sulfate, but not named as the studied preparation
The evidence we use to rank forms points to one preparation: the patented crystalline glucosamine sulfate that Dona sells, which is stabilised with sodium chloride. This bottle's panel prints Glucosamine Sulfate KCl, a potassium-chloride-stabilised sulfate. That is the right family and a step above the HCl in most combo bottles, but it is not the exact studied product, and the label does not claim it is. We score it a notch under Life Extension's sulfate on the form line, because the salt is unnamed as crystalline.
1,500 mg is the salt, not the glucosamine
The one line on the panel is Glucosamine Sulfate KCl 1,500 mg. That weight includes the sulfate and the potassium chloride, so the glucosamine in two capsules is less than 1,500 mg, and the panel does not print a glucosamine-only figure. The trial dose we compare against is expressed as glucosamine sulfate, so the match is close as printed but not exact. It is worth knowing when comparing bottles that print their amounts differently.
Third Party Tested has no name behind it
The bottle and the brand's page both say an independent lab tests the product, and neither says which lab or links a result. The Amazon listing adds an NSF Certified facility, a line the brand's own product page does not repeat. We checked the NSF Certified for Sport product search and the NSF dietary-supplement listings on October 18, 2026 and found no Nutricost entry. Absence from a list is not proof of failed testing; it means we have nothing to check. Ask Nutricost support for the lot's certificate of analysis if it matters to you.
The price changes the shape of the trial
At $18.95 for 120 servings, a full 90-day trial costs about $14.21 and one bottle lasts 120 days. Kirkland is the cheapest combo and costs more than twice as much over the same period; Dona costs several times as much. If you have no idea whether you respond to glucosamine, a cheap single-ingredient sulfate is a reasonable way to find out, and you give up only chondroitin and the exact studied salt.
Shellfish and the potassium salt
The label states Contains: Shellfish (crab, shrimp), so this is a stop for anyone with a shellfish allergy. The salt is potassium chloride; the panel does not list potassium as a separate line. The back label advises consulting a healthcare professional before use if you are pregnant or nursing, taking medication, or have a medical condition, which is the right call if you have been told to limit potassium.
Full analysis: all pros & cons (9), buy if / skip if
- Glucosamine sulfate rather than HCl, in a one-ingredient capsule
- 1,500 mg once a day in two capsules, the simplest schedule on the list after Dona
- About $0.16 a serving and about $14.21 for a 90-day trial, the cheapest on the list
- One 240-capsule bottle covers 120 days, so no mid-trial reorder
- Panel prints the KCl salt and never says crystalline, so it is not the studied Rotta preparation
- The 1,500 mg is the salt weight; the panel gives no glucosamine-only amount
- Third Party Tested names no lab, and Nutricost is on no NSF list we could find
- No chondroitin or MSM, so a full combo needs a separate product
- Shellfish allergen (crab, shrimp); a hard stop for anyone with a shellfish allergy
- You want to run a glucosamine sulfate responder trial for as little as possible
- You prefer one ingredient and one daily serving over a four-capsule combo
- You do not need chondroitin or MSM in the same bottle
- You have a shellfish allergy; the label states crab and shrimp
- You want the exact crystalline sulfate preparation the Cochrane review credits; that is Dona
- You want a verifiable testing record; Nutricost names no lab and is on no NSF list we could find
- You want a full glucosamine and chondroitin combo; this has no chondroitin
Each two-capsule serving delivers 1,500 mg of glucosamine sulfate KCl, once a day, for about $0.16. That makes a 90-day trial about $14, less than any other bottle here. The form is a sulfate, which our evidence frame ranks above HCl, but the panel prints the potassium chloride salt and does not say crystalline, so it sits below Dona on form. The Third Party Tested claim could not be verified at NSF. A sensible low-cost trial if you want a sulfate and do not need chondroitin; Dona is still the form to take if the evidence is your priority.
Nutricost Glucosamine Sulfate is a plain, single-ingredient glucosamine bottle. The Supplement Facts panel lists one line: Glucosamine Sulfate KCl, 1,500 mg per serving, with a serving of two capsules and 120 servings in the 240-capsule bottle. There is no chondroitin and no MSM, and the other ingredients are a gelatin capsule, calcium laurate, vegetable magnesium stearate and silica. It contains shellfish (crab, shrimp). The Amazon offer we checked on October 18, 2026 was $18.95, which is about $0.16 a serving, or about $14.21 for a 90-day responder trial, the lowest on our list. What it does not have is the exact studied form: the panel says KCl, never crystalline, and the Third Party Tested line names no lab. It is a fair, cheap sulfate trial, not the evidence-grade pick.
A cheap, honest sulfate trial, but Dona is still the form to take.
Nutricost Glucosamine Sulfate is a simple bottle done fairly: one ingredient, the sulfate form, 1,500 mg once a day, and about $14 for a 90-day trial. If you want to find out whether glucosamine does anything for your joints without spending much, and you do not need chondroitin, it is a reasonable way to run the experiment. What holds the score at 8.2 is what the label cannot show. The panel prints the potassium chloride salt and never says crystalline, so it is not the exact preparation behind the positive Cochrane signal, and the 1,500 mg is the salt weight. The Third Party Tested line names no lab, and we found no NSF listing for Nutricost. Dona is the form to take if the evidence is your priority, and Life Extension adds chondroitin to a sulfate with far better documentation. Pick Nutricost for the price, run it for 8 to 12 weeks, and stop if nothing changes. If you have any shellfish allergy, skip it.
If This Doesn’t Fit — Try These
Dona Crystalline Glucosamine Sulfate
The patented crystalline sulfate the Cochrane data single out, at 1,500 mg once daily.
Kirkland Signature Glucosamine Chondroitin
The cheapest full-dose combo, 1,500 mg glucosamine HCl plus 1,200 mg chondroitin, at about $13 a month.
Life Extension Glucosamine/Chondroitin
A glucosamine sulfate plus chondroitin combo from a documentation-focused brand, at about $28 a month.
Quick Answers
Is Nutricost Glucosamine Sulfate the same as crystalline glucosamine sulfate (Dona)?
Not on what the label says. The Supplement Facts panel prints Glucosamine Sulfate KCl, which is a glucosamine sulfate stabilised with potassium chloride. The panel does not use the word crystalline and does not name the Rotta preparation. The preparation behind the Cochrane review's positive signal is the patented crystalline sulfate that Dona sells, which is stabilised with sodium chloride. So this bottle is the right family (sulfate, not HCl) but not the exact studied product, and we score it a notch below Dona on form for that reason.
How much glucosamine is in one serving?
The panel lists one line: Glucosamine Sulfate KCl 1,500 mg per serving, and a serving is two capsules. That figure is the weight of the whole salt, which includes the sulfate and the potassium chloride, so the glucosamine itself is less than 1,500 mg. The panel does not print a glucosamine-only amount. For the trial-dose comparison on this page we use the 1,500 mg exactly as printed and note the salt weight in the dose score.
Is Nutricost Glucosamine Sulfate third-party tested?
The back label prints Third Party Tested, and nutricost.com says the product is tested by an independent, accredited lab. Neither names the lab, and we found no certificate of analysis page. The Amazon listing also says the product is made in an NSF Certified facility, but the product page on nutricost.com says only GMP Compliant, FDA Registered. We searched the NSF Certified for Sport product search and the NSF dietary-supplement listings on October 18, 2026 and found no Nutricost listing in either. So the claim is plausible but we could not verify it at a certifier. If it matters to you, ask Nutricost support for the lot's certificate of analysis.
How much does a trial cost?
The Amazon offer on October 18, 2026 was $18.95 for 240 capsules. At two capsules a day that is 120 servings, so about $0.16 a serving, about $4.74 per 30 days, and about $14.21 for a 90-day trial. That is the lowest trial cost of any bottle on the list, and well under the cost of a month of Dona. It is a single-ingredient bottle, so you add no chondroitin or MSM for that price.
Can I take it with a shellfish allergy?
No. The label states Contains: Shellfish (crab, shrimp). Glucosamine in this product comes from shellfish shells. With any shellfish allergy, skip it. The salt is also potassium chloride; if a clinician has told you to limit potassium, or you take medication, the back label tells you to consult a healthcare professional first.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Clegg 2006 (GAIT) PMID 16495392 — Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis. The NIH-funded GAIT trial (~1,583 patients) found that glucosamine HCl, chondroitin sulfate, and the two combined were NOT significantly better than placebo for reducing knee-osteoarthritis pain overall. A pre-specified exploratory subgroup with moderate-to-severe knee pain MAY have benefited from the glucosamine-plus-chondroitin combination, but this was not a confirmatory result. The single most important reason the honest verdict on this category is 'mixed, run a responder trial' rather than 'proven.'
- [2] Towheed 2005 (Cochrane) PMID 15846645 — Glucosamine therapy for treating osteoarthritis. Cochrane systematic review of glucosamine trials. Critically, the benefit SHRANK toward zero in the higher-quality, properly-blinded trials, and the positive signal that remained was concentrated almost entirely in studies using ONE preparation — the patented crystalline glucosamine SULFATE (Rotta/Dona). Trials using other glucosamine forms (including glucosamine HCl) generally failed to beat placebo. The evidentiary basis for ranking crystalline glucosamine sulfate as the best-evidenced form and treating glucosamine HCl combos as a softer bet.
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