Best Joint Supplements for Athletes 2026: Collagen & More

This article contains affiliate links: if you buy through them we may earn a commission, at no extra cost to you. Learn more.

The first jog after a winter off, a weekend volleyball tournament on hard sand, twenty years of five-a-side on artificial turf, a heavy squat day at 45: sooner or later every athlete starts to think about their knees, ankles and tendons. That’s when collagen tubs and glucosamine bottles start showing up in gym bags. This guide to the best joint supplements for athletes compares seven real products by what’s on the label, third-party testing for sport and price per serving, and is honest about what the research does and doesn’t show.

Prices change often. The prices below are what we saw at the maker or a major retailer in October 2026; check the current price before you buy.

Talk to a doctor or dietitian first: supplements are not medicine and none of these products treats or prevents any condition. Joint pain, swelling or an injury needs a doctor or physiotherapist, not a powder. Check with your doctor or a registered dietitian before you start, especially if you take blood thinners or diabetes medication, have a shellfish allergy, or are pregnant. Follow the label.

Our top picks

Joint supplements compared

Product	Per serving (label)	Testing	About (Oct 2026)	Per serving
Klean Collagen+C	15 g collagen, 50 mg vitamin C	NSF Certified for Sport	$52 / 20	$2.60
Momentous Collagen Peptides	11.6 g peptides + 5.2 g FORTIGEL, 50 mg vitamin C	NSF Certified for Sport	$55 / 30 ($41 subscribed)	$1.37–1.83
Vital Proteins Collagen Peptides	20 g collagen peptides	Listed in NSF database (check your size)	$45 / 28	$1.61
Thorne Collagen Fit	15 g collagen, 125 mg nicotinamide riboside	NSF Certified for Sport	$56 / 30	$1.87
Designs for Sport Collagen Complex	12.5 g collagen peptides	NSF listed	$73 / 30	$2.44
Cosamin ASU	1,500 mg glucosamine, 350 mg chondroitin, 400 mg ASU	Only the 3X/Day 180-ct is NSF listed	$40 / 50	$0.80
Thorne Curcumin Phytosome	1 g Curcumin Phytosome (Meriva)	NSF Certified for Sport	$68 / 60	$1.13

What the research says (honestly)

The evidence is thinner than the marketing. The International Olympic Committee’s 2018 consensus statement on supplements says gelatin and collagen appear to be low risk, but data are few and benefits for elite athletes are not known. A small 2017 study of eight men found that 15 g of vitamin C-enriched gelatin taken an hour before skipping rope raised a blood marker of collagen production; that’s interesting lab work, not proof of fewer injuries. For glucosamine and chondroitin, the NIH’s complementary health center calls the evidence mixed: one 2018 analysis found each alone did better than placebo for pain in people with osteoarthritis, but not the two together. Many athletes still take collagen as part of their routine; just know it’s a small, uncertain piece next to training load, sleep, strength work and good food.

The best joint supplements for athletes, one by one

1. Klean Athlete Klean Collagen+C: best overall

Klean Athlete makes supplements for drug-tested athletes, and Klean Collagen+C is listed in NSF’s Certified for Sport database. A scoop of the Natural Berry flavor gives 15 g of hydrolyzed bovine collagen and 50 mg of vitamin C (from amla fruit), with 14 g of protein and 60 calories. It’s about $52 for 20 servings at a retailer, or $2.60 a serving. An unflavored version is also sold.

• Good: NSF certified; collagen and vitamin C in one scoop, the pairing used in studies.
• Watch out: only 20 servings, so the cost per serving is high.
• Best for: drug-tested athletes and anyone who wants a simple, certified collagen.

Check the Klean Collagen+C price on Amazon

2. Momentous Collagen Peptides: best with FORTIGEL

Momentous’s collagen lists two kinds on the label: 11.6 g of grass-fed collagen peptides and 5.2 g of FORTIGEL, a branded collagen hydrolysate, plus 50 mg of vitamin C. It’s NSF Certified for Sport, with 30 servings for $54.99 (about $1.83) or $41.24 on subscription (about $1.37). When we checked, the one-time option was briefly out of stock at the maker.

• Good: NSF certified; branded collagen plus vitamin C; good value on subscription.
• Watch out: mostly sold at the maker; stock comes and goes.
• Best for: athletes who already use Momentous protein or creatine.

See Momentous Collagen Peptides at Momentous

3. Vital Proteins Collagen Peptides: best value

The tub you see in supermarkets. The unflavored powder gives 20 g of collagen peptides per serving and dissolves in coffee or a smoothie. The 19.3 oz tub has 28 servings for $45 at the maker (about $1.61 a serving). Vital Proteins Collagen Peptides appears in NSF’s Certified for Sport database, though the maker page doesn’t mention it, so check the listing against your exact tub. Vitamin C and hyaluronic acid amounts differ between the Original and “Advanced” formulas; read the label.

• Good: the most collagen per scoop here; easy to find; mixes without a taste.
• Watch out: several similar-looking formulas; confirm certification for your size.
• Best for: a daily scoop in morning coffee, on a budget.

Check the Vital Proteins Collagen Peptides price on Amazon

4. Thorne Collagen Fit: best for Thorne fans

Thorne’s Collagen Fit gives 15 g of bovine collagen peptides per scoop, plus 125 mg of nicotinamide riboside and 50 mg of betaine. There’s no vitamin C in it. It’s NSF Certified for Sport, with 30 servings for $56 (about $1.87). Note that Thorne’s other collagen, Collagen Plus, is not in NSF’s database.

• Good: NSF certified; plain collagen with a short label.
• Watch out: no vitamin C; extra ingredients you may not need.
• Best for: athletes already buying from Thorne.

See Thorne Collagen Fit at Thorne

5. Designs for Sport Collagen Complex: most collagen types

This one blends three branded collagen peptides (FORTIGEL, VERISOL and FORTIBONE) into 12.5 g per 13 g scoop, with 11 g of protein and 45 calories. NSF lists the product (under the name Collagen Complete in its database). Vitacost sells 30 servings for about $73, or $2.44 a serving. There’s no vitamin C on the label.

• Good: NSF listed; branded ingredients named on the label.
• Watch out: priciest per gram of collagen; smaller scoop.
• Best for: athletes who want named, branded collagen types.

Check the Designs for Sport Collagen Complex price on Amazon

6. Cosamin ASU: best glucosamine option

For athletes who prefer the classic glucosamine route, Nutramax’s Cosamin ASU lists 1,500 mg of glucosamine, 350 mg of chondroitin and 400 mg of ASU (avocado/soybean unsaponifiables) per three capsules, plus boswellia and decaffeinated green tea extract. A 150-capsule bottle (50 servings) is about $40, or $0.80 a serving. NSF’s database lists “Cosamin ASU 3X/Day” in a 180-capsule size; we couldn’t confirm the other retail bottles are covered, so drug-tested athletes should look for that listing. The NIH notes glucosamine may affect blood sugar, may interact with warfarin, and is sometimes made from shellfish.

• Good: lowest price per serving; long-established brand.
• Watch out: three capsules a day; mixed evidence; check with your doctor about medications.
• Best for: older recreational athletes who want a capsule instead of a powder.

Check the Cosamin ASU price on Amazon

7. Thorne Curcumin Phytosome: best non-collagen pick

Curcumin (from turmeric) is another ingredient many athletes keep on the shelf. Thorne’s NSF Certified for Sport version gives 1 g of Curcumin Phytosome (the Meriva form, bound to sunflower phospholipid) per two capsules. A 120-capsule bottle is 60 servings for $68, about $1.13 a serving. The label doesn’t state the curcuminoid amount.

• Good: NSF certified; capsules, no mixing.
• Watch out: not a collagen; ask your doctor if you take blood thinners or other medication.
• Best for: athletes who’d rather take a capsule than a powder.

See Thorne Curcumin Phytosome at Thorne

How to choose a joint supplement

• Start with testing. USADA says no supplement is 100% risk-free and points athletes to NSF Certified for Sport. Look your exact product and flavor up on nsfsport.com.
• Read grams, not claims. Collagen per serving here runs from 12.5 g to 20 g. Compare the label, not the front of the tub.
• Vitamin C or not. Klean and Momentous include 50 mg; Thorne Collagen Fit and Designs for Sport don’t.
• Collagen isn’t a complete protein. It doesn’t replace your regular protein; see our best protein powder for athletes.
• Check allergies and medications. Glucosamine can come from shellfish; curcumin and glucosamine may interact with blood thinners. Ask your doctor or pharmacist.

Supplements are the smallest part of looking after your joints. Strength work, good shoes and supports matter more: see best knee sleeves and best knee brace for running, our guide to recovery tools for runners over 50, best protein for older athletes, or browse Joint Support.

Joint supplement questions

Do collagen supplements work for athletes?

The honest answer is: not proven. The IOC consensus statement says collagen appears low risk but benefits for elite athletes are not known, and the studies so far are small. Many athletes take it anyway as a low-risk add-on.

Collagen or glucosamine?

They’re different ingredients. Collagen is a protein powder; glucosamine and chondroitin are usually capsules aimed at people with joint wear. The NIH describes the glucosamine evidence as mixed. Your doctor can help you decide whether either is worth it for you.

When do athletes take collagen?

Follow the label. In the small 2017 study, gelatin with vitamin C was taken an hour before exercise, and some athletes copy that timing; there’s no strong evidence that timing matters for most people.

Is collagen safe for drug-tested athletes?

Collagen itself isn’t banned, but any supplement can be contaminated. Choose one listed by NSF Certified for Sport and check the listing for your exact product.

Can collagen replace protein powder?

No. Collagen lacks tryptophan, an essential amino acid, so it isn’t a complete protein. Most athletes use it alongside, not instead of, whey or plant protein.