Thorne Glucosamine & Chondroitin Review

Thorne Glucosamine & Chondroitin is a capsule supplement that the page presents as a combination of two compounds naturally found in the body's cartilage, offered in one formula intended to protect healthy joints and support mobility. The product page states it is designed for joint and cartilage support in the knees, shoulders, and spine, in a synergistic formula it describes as validated by clinical research. Each serving is one capsule, and the container holds 90 capsules. The listed key ingredients are Chondroitin Sulfate at 250mg and Glucosamine Sulfate (Potassium Chloride) at 500mg per capsule. Other ingredients listed are Hypromellose Capsule and Calcium Laurate. The page explains that chondroitin is a category of glycosaminoglycans, which the body needs to form important components of joint cartilage, and that taken with glucosamine it supports joint function and mobility by enhancing the body's production of GAGs and helping to prevent their degradation. Thorne states that both nutrients are provided in sulfate forms, which it describes as optimally stable, and says clinical studies have shown the combination of glucosamine and chondroitin sulfate protects and supports joint surfaces more effectively than glucosamine sulfate alone. Listed benefits include helping maintain healthy joint function, supporting normal cartilage function and structure, supporting healthy cartilage of joints like knees and shoulders, supporting healthy spinal cartilage between each vertebra, helping protect joint structures, providing support for joints in aging adults, and helping maintain mobility throughout the lifespan. Listed features include an easy-to-take one capsule per serving protocol, both glucosamine and chondroitin in sulfate forms, a well-researched combination of ingredients, and small molecular weight chondroitin for improved absorption and bioavailability. The page says the product is third-party tested and certified to verify that what is in the package matches the label and to confirm it contains no unsafe levels of contaminants such as heavy metals, pesticides, and microorganisms. Warnings on the page state that the product is contraindicated in anyone with a history of hypersensitivity to any of its ingredients, and that it contains shellfish because glucosamine sulfate is derived from crab and or shrimp. Pregnant users are told to consult a health-care practitioner before use. The page reports no known adverse interactions or contraindications at publication date. The listed price is $40 for 90 capsules, or $36 with a subscription at 10 percent off, and the page notes free shipping and HSA or FSA eligibility.

Product Focus: Joints and Mobility
Tier ⓘ
Tier 4 · Rank 1
Tier 4 · Emerging. A promising mechanism or animal data, with thin human evidence so far. Rank 1 within Tier 4 for Joints and Mobility; 44 of 57 overall. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
58 /100
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
92% of 2,542
Biohacker Mentions
8 of 10
Cost per month
$13

Study, Trial or Testing Result Summary

Members Only92 human studies · 50 improved

2 of these 92 human studies gave the ingredient by injection, not by mouth.

92 human studies50 improved23 no effect60,603 people studied

At three capsules a day, this product gives 1500 mg of glucosamine sulfate and 750 mg of chondroitin sulfate, both at or above the studied doses. For glucosamine sulfate, a pooled analysis of 47 trials in knee arthritis linked it to less pain and less joint narrowing, though the estimates were uncertain [1]. Another analysis found it slowed knee joint narrowing [2]. In 319 women, 3 years of use stopped joint narrowing and improved symptoms [3]. But 2 years did not beat placebo for knee pain or narrowing in 605 people [4] or for hip arthritis [5], and one analysis found benefit only for stiffness [6]. For chondroitin sulfate, reviews of knee trials found less pain and better function, with results varying between studies and brands [7][2]. In 300 people, 800 mg daily stopped joint narrowing but did not change symptoms [8]. Large trials of 1583 and 662 people found no clear pain benefit [9][10]. Overall, any benefit appears modest and inconsistent. Animal and cell studies are never counted.

See all 92 studies →Hide the studies

Review Totals and Summary

Members Only2,542 reviews · 92% positive
2,542 reviews · Amazon 921 · Store.mayoclinic 690 · Naturalathleteclinic 690 · Vitacost 103 · Thorne 82 · Walmart 56
92% positive3% neutral5% negative

Thorne Glucosamine & Chondroitin capsules are well regarded, with about 1,162 ratings across the stores and most of them positive. Buyers mainly praise the joint comfort and their trust in the brand, and the few complaints concern fulfilment and capsule quality. Reviews of other forms of the product were left out. **What buyers say it did for them:** Many describe less joint stiffness and ache. Some have taken it for years and notice a difference, and one reviewer noticed the effect when they stopped taking it. Others say "It does exactly what it says it does. Helps achy joints." and "I definitely notice a difference when I've gone off of it." One reviewer says they switched from another joint product that upset their stomach and got "the same joint relief without any pain." Store summaries add knee comfort for runners and for a buyer's mother, and one reviewer says it helps with achy muscles. The results are not uniform, though. One store's summary says some users report significant benefit while others notice no change, and a buyer who took it alongside other supplements was unsure how much it helped. Another reviewer said they would need longer to judge. **What they complain about:** Complaints are few and are about service and quality control, not effectiveness. One reviewer wrote "Didn't receive my order." Another received capsules that were empty, and the replacement had the same problem: "It happened on the replacement again too." One store's summary mentions shipping experiences varying, with some praising quick delivery and others running into problems. Several of the lower ratings are not explained in the written feedback. **Taste, smell, pill size and form:** The reviews and summaries say nothing about taste, smell or capsule size. One buyer says they had "no GI issues," and another found a different product hard on the stomach and this one fine. **Value for money:** Price is barely discussed. One buyer calls it the "Best product on the market" and asks the company not to raise prices, which suggests they are satisfied with the current cost. No reviewer complains about price. **Brand trust and testing:** This is the most consistent theme. Buyers say they value testing and third-party verification. One reviewer says "I am comfortable using Thorne products and appreciate all the testing." Another says Thorne's products are "verified," and a personal trainer recommended the brand to them. A store summary notes that buyers return for this reason. **Who it seems to suit and who it did not:** It seems to suit people with stiff or achy joints who want a tested product, including long-term users and people who found other brands less effective. It also suited at least one buyer whose stomach was upset by another joint supplement. It suited athletes and active people who mentioned knee strain. It did not suit buyers who got empty capsules or no delivery, and it did little for those who noticed no change in their joints. Because many written reviews are short and general, they say little about how fast it works or how it compares with other glucosamine and chondroitin products.

Biohacker Summary

Members Only8 of 10 recommend it
8 of 10 biohackers on our panel recommend it

Five of the ten panelists spoke about chondroitin, the main ingredient, and they are split. Two recommend it (one for kidney stone prevention alongside vitamin A, one for recovery and joint comfort), one has taken it religiously since the 1990s and puts it in his own joint formula, one is neutral and ranks it only in the okay tier with the least evidence for skin and joints, and one warns that it and glucosamine are dead supplements for knees that do not fix the problem. No one gave a chondroitin dose or a preferred form beyond the sulfate type mentioned for kidney stones. Glucosamine is a smaller ingredient in this product, and the panel is mixed on it, with several calling the joint evidence weak or small while a few use it for joints or recovery, and one advises avoiding the sulfate form in pregnancy.

See all 9 biohackers →Hide the biohackers
  • Siim Land · Chondroitin · neutral
    • 6 Jan 2026 · neutral · YouTube ↗
      Explains that while there are no human studies on chondroitin for skin anti-aging, cell studies suggest it stimulates procollagen expression and promotes wound healing and skin regeneration.
    • 12 Jun 2026 · Glucosamine · recommends · YouTube ↗
      States that glucosamine does actually improve joint pain, despite some thinking it's a scam supplement.
    • 6 Jan 2026 · Glucosamine · neutral · YouTube ↗
      Notes that glucosamine, often considered a gimmick for joint health, may also be beneficial for skin anti-aging due to its sulfur content supporting glutathione production and inhibiting MMPs.
    • 28 Dec 2025 · neutral · YouTube ↗
      States that Chondroitin has the least evidence for skin and joint health compared to MSM and glucosamine, placing it in the 'okay' tier.
    • 28 Dec 2025 · Glucosamine · neutral · YouTube ↗
      Notes that Glucosamine Sulfate is known for joint benefits, has anti-inflammatory effects, and even skin anti-aging effects, possibly through its sulfur content aiding glutathione synthesis, rating it as 'good' but not 'god tier'.
    • 13 Dec 2025 · uses · YouTube ↗
      Would include chondroitin in an 'unlimited' supplement stack, primarily for its potential skin benefits rather than joint health.
    • 13 Dec 2025 · Glucosamine · uses · YouTube ↗
      Would include glucosamine in an 'unlimited' supplement stack due to research for joint health and its association with lower heart disease and mortality, though it's not a top priority.
    • 10 Oct 2025 · neutral · YouTube ↗
      Places chondroitin sulfate in the 'okay tier', noting it is a sulfur compound mostly for joint health, but has the least evidence among joint supplements and for lifespan, despite some potential skin and joint benefits.
    • 10 Oct 2025 · neutral · Podcast ↗
      Discusses Chondroitin as a supplement for joint health, often combined with glucosamine, but notes that its effectiveness for longevity is not well-established.
    • 10 Oct 2025 · Glucosamine · recommends · YouTube ↗
      Recommends glucosamine, stating it has joint benefits, is associated with reduced mortality and heart disease in humans, increases autophagy, and has shown longevity benefits in animal studies.
    • 10 Oct 2025 · Glucosamine · neutral · Podcast ↗
      Discusses Glucosamine as a popular supplement for joint health, often used for osteoarthritis, but notes that its role in longevity is not as prominent as other compounds.
    • 3 Sep 2025 · Glucosamine · stopped · YouTube ↗
      Used to take glucosamine in the past but no longer does, as he has already tested most supplements.
    • 16 Aug 2025 · neutral · YouTube ↗
      Notes that Chondroitin has the least evidence for skin and joint health compared to glucosamine and MSM, placing it in the 'okay tier'.
    • 16 Aug 2025 · neutral · Podcast ↗
      Discusses chondroitin sulfate as a supplement.
  • Dave Asprey · Chondroitin · warns
    • 21 Oct 2025 · warns · YouTube ↗
      Implies chondroitin is ineffective for joint health, grouping it with glucosamine as 'age-old supplements for knees' that are 'just dead in 2025' and not fixing the problem.
    • 21 Oct 2025 · Glucosamine · warns · YouTube ↗
      Notes that people dealing with osteoarthritis typically take high doses of glucosamine, MSM, and similar supplements, spending about $60-70 a month with virtually no benefit.
    • 27 Jun 2025 · Glucosamine · uses · YouTube ↗
      Found that taking glucosamine HCL significantly improved his knee pain when he was younger.
    • 23 Jan 2024 · Glucosamine · recommends · YouTube ↗
      Recommends glucosamine HCL, not glucosamine sulfate, as an affordable old-school supplement for knee and joint pain, suggesting up to a gram.
  • Thomas DeLauer · Chondroitin · uses
    • 15 Jun 2024 · uses · YouTube ↗
      Has been taking chondroitin religiously since the 90s after meeting a jacked 63-year-old man who recommended it, leading to the creation of his own 'Joint Warfare' supplement which includes it.
    • 21 May 2025 · Glucosamine · neutral · YouTube ↗
      Notes that glucosamine chondroitin used to be popular for joint pain, but the literature on its efficacy was weak.
    • 12 Apr 2025 · Glucosamine · warns · YouTube ↗
      Notes that the literature for glucosamine and glucosamine chondroitin for joint pain was pretty weak in terms of efficacy.
    • 15 Jun 2024 · Glucosamine · uses · YouTube ↗
      Has been taking glucosamine religiously since the 90s after meeting a jacked 63-year-old man who recommended it, leading to the creation of his own 'Joint Warfare' supplement which includes it.
    • 27 Mar 2024 · Glucosamine · neutral · YouTube ↗
      Mentions that people might suggest glucosamine for joint or muscle stiffness, but implies there are other factors at play.
    • 10 Aug 2016 · warns · YouTube ↗
      Advises skipping glucosamine and chondroitin, suggesting to go straight for a quality collagen protein instead.
    • 10 Aug 2016 · Glucosamine · warns · YouTube ↗
      Advises skipping glucosamine and chondroitin, suggesting to go straight for a quality collagen protein instead.
  • Dr. Eric Berg · Chondroitin · recommends
    • 6 Jan 2021 · recommends · YouTube ↗
      States that chondroitin sulfate is the most potent inhibitor of kidney stones and can reduce the risk of getting them.
    • 23 Jun 2023 · Glucosamine · recommends · YouTube ↗
      Recommends glucosamine for osteoarthritis, noting it is a precursor for cartilage, increases lubrication and synovial fluid in joints, and helps prevent the breakdown of cartilage.
    • 1 May 2023 · Glucosamine · recommends · YouTube ↗
      Recommends N-Acetyl Glucosamine (NAG) as a precursor to the GAG structure, which can help improve psoriasis by controlling rapidly dividing cells, stimulating GAG production in the colon and skin, and providing an immunosuppressive and anti-inflammatory effect.
    • 27 Nov 2020 · recommends · YouTube ↗
      Recommends taking chondroitin sulfate in addition to vitamin A to reduce the risk of kidney stones, citing research that demonstrates its effectiveness.
    • 23 Nov 2020 · Glucosamine · recommends · Podcast ↗
      Dr. Berg lists glucosamine as a remedy for dental pathogens.
    • 9 Jun 2018 · Glucosamine · recommends · YouTube ↗
      Recommends glucosamine to help build up the joints and provide relief for osteoarthritis.
    • 14 Apr 2017 · Glucosamine · recommends · YouTube ↗
      Recommends his Joint Pain Relief product, which he created for himself, containing traditional ingredients like glucosamine, natural vitamin C, Tendoguard collagen for tendons and cartilage repair, adrenal extracts for anti-inflammatory support, stinging nettle root, turmeric, and boswellia.
  • Ben Greenfield · Chondroitin · recommends
    • 18 Apr 2019 · recommends · YouTube ↗
      Ben Greenfield recommends chondroitin as a natural compound that supports recovery and joint comfort.
    • 30 Oct 2025 · Glucosamine · neutral · YouTube ↗
      Does not personally take D-glucosamine but plans to research its dosage and sourcing after seeing data suggesting it mimics calorie restriction and extends lifespan.
    • 25 Jan 2024 · Glucosamine · neutral · YouTube ↗
      Mentions glucosamine sulfate as an ingredient in the NOVOS supplement, which has decent human research for cellular longevity and staving off DNA damage.
    • 18 Apr 2019 · Glucosamine · recommends · YouTube ↗
      Ben Greenfield recommends glucosamine as a natural compound that supports recovery and joint comfort.
    • 29 Dec 2018 · Glucosamine · uses · YouTube ↗
      He says that his company Kion combines ancestral nutrients with modern molecules like glucosamine chondroitin.
    • 6 Dec 2018 · Glucosamine · uses · YouTube ↗
      Uses glucosamine chondroitin as part of his herbal anti-inflammatories for soreness.
    • 6 Oct 2018 · uses · YouTube ↗
      Says he personally designed and formulated Kion Flex, a complete shotgun formula for joints, containing elements like cidel, mirastoliates, turmeric, glucosamine chondroitin, and tart cherry to heal the body.
    • 6 Oct 2018 · Glucosamine · uses · YouTube ↗
      Says he personally designed and formulated Kion Flex, a complete shotgun formula for joints, containing elements like cidel, mirastoliates, turmeric, glucosamine chondroitin, and tart cherry to heal the body.
    • 29 Sep 2018 · Glucosamine · uses · YouTube ↗
      Consumes glucosamine chondroitin along with other nutrients to control inflammation levels.
    • 13 Sep 2018 · Glucosamine · neutral · YouTube ↗
      Mentions glucosamine sulfate as a substance injected in Prolotherapy to trigger healing.
    • 4 Aug 2018 · neutral · YouTube ↗
      Includes chondroitin as an ingredient for joints.
    • 4 Aug 2018 · Glucosamine · neutral · YouTube ↗
      Includes glucosamine as an ingredient for joints.
    • 2 Aug 2018 · Glucosamine · recommends · YouTube ↗
      Recommends glucosamine chondroitin as something that can enhance the effects of Celadrin.
    • 2 Sep 2017 · recommends · YouTube ↗
      Recommends chondroitin sulfate as something that can bind lectins and can be found in any store.
  • Dr. Rhonda Patrick · Glucosamine · neutral
    • 28 Apr 2025 · neutral · YouTube ↗
      States they don't use glucosamine chondroitin much and haven't looked into the database in many years, noting mixed evidence and that it wouldn't be their first, second, or third line of defense for consistent injury issues.
    • 22 Apr 2025 · neutral · Podcast ↗
      Discusses whether glucosamine chondroitin actually helps joints.
    • 27 Aug 2024 · neutral · YouTube ↗
      Considers glucosamine a 'tier two' supplement, noting that while the effect is small, there seems to be some evidence for its efficacy.
    • Date not recorded · neutral · Website ↗
      Dr. Rhonda Patrick discusses glucosamine and Alzheimer's.
  • Dr. Mark Hyman · Glucosamine · uses
    • 7 Aug 2024 · uses · YouTube ↗
      Uses N-acetylglucosamine (NAG), describing it as a safe, non-toxic compound derived from shrimp, to support the gut wall.
    • 21 Jul 2021 · recommends · YouTube ↗
      Notes that glucosamine is found only in beef and a lack of it has been associated with harm to the body, including connective tissue dysfunction.
  • Peter Attia · Glucosamine · uses
    • 31 Dec 2019 · uses · YouTube ↗
      Would make a smoothie with whey protein isolate, glutamine, glucosamine, and flaxseed oil for recovery after his run.
  • Bryan Johnson · Glucosamine · warns
    • Date not recorded · warns · Website ↗
      Advises avoiding Glucosamine Sulfate during pregnancy.
    • Date not recorded · uses · Website ↗
      Bryan Johnson takes Glucosamine Sulfate KCI daily as part of his Longevity Mix, which supports cartilage, joints, & skin.

RAL Summary

Members OnlyTier 4 for Joints and Mobility

The tier rests on an '80% improved' figure that contradicts the 26 of 51 studies given, and large trials and pooled analyses disagree, so the human evidence is not clear enough for tier 2. So it is graded Tier 4, lower than the rules alone gave.

  • Emerging: not enough evidence to rank higher yet.

Where the evidence disagrees: 23 of the 92 human studies found no effect.

More Details

Members OnlyBody systems · Combine with · Possible side effects

Body systems: Musculoskeletal system

Combine with: Glucosamine sulfate and chondroitin sulfate are structural cartilage components and are a well-established pairing for joint comfort and mobility, particularly in knee osteoarthritis. To complement them, consider omega-3 fatty acids (EPA/DHA) to help modulate inflammation, and curcumin (with piperine or in a phytosome form) for additional support of joint comfort. Collagen peptides, especially type II collagen (UC-II), may support cartilage matrix integrity. MSM provides sulfur for connective tissue and may ease exercise- or age-related stiffness. Vitamin C is needed for collagen synthesis, while vitamin D3 with K2 and magnesium supports bone health beneath the cartilage. Hyaluronic acid can support synovial fluid lubrication. Note that glucosamine is often derived from shellfish, so those with allergies should check the source. It may also affect blood sugar in sensitive people, and chondroitin may add to the effect of meds like a med, so consult a healthcare provider if on such medications.

Possible side effects: In studies, glucosamine had no more side effects than placebo, and chondroitin was well tolerated. Buyers mention no stomach issues, though some received empty capsules.

Supplement Facts

Glucosamine Sulfate 500 mg · Chondroitin Sulfate 250 mg
Supplement Facts
Serving Size 1 Capsule(s)
Servings Per Container 90
Amount Per Serving% Daily Value
Glucosamine Sulfate500 mg†
Chondroitin Sulfate250 mg†
† Daily Value not established.

Other ingredients: Hypromellose, Calcium Laurate.

Directions: Suggested Use: Take 1 capsule three times daily or as recommended by your health-care practitioner.

Barcode (UPC) 693749767022 · Label source: NIH label database · Report a label change

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Graded November 5, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.