Joint supplements are the most commonly bought health product for older cats, and the most loosely regulated. In the US they are sold as animal supplements, not drugs – which means nobody has to prove they work before they reach the shelf. What you can check is the ingredient panel, the dose per serving, and whether the manufacturer follows a recognised quality standard.
That is exactly what we compared below: glucosamine and chondroitin amounts, whether the product adds ASU, MSM or omega-3s, the format (chew, capsule, liquid) and how easy it is to give daily. We have not run a clinical trial and we are not making treatment claims. Every efficacy statement attributed to a brand is quoted from that brand's own label or website.
| Product | Best For | Format | Rating | Link |
|---|---|---|---|---|
| Nutramax Cosequin Soft Chews | Best Overall | Soft chew | 4.4/5 (11,684) | Check Price |
| Nutramax Dasuquin | Best Premium | Soft chew | 4.4/5 (1,797) | Check Price |
| LiquidHealth Joint Purr-Fection | Best Liquid | Liquid dropper | 4.4/5 (2,488) | Check Price |
| Nutramax Cosequin Capsules | Best Capsule | Capsule | 4.1/5 (1,247) | Check Price |
| NOW Pets Joint Support | Best Value | Chewable tablet | 4.4/5 (227) | Check Price |
What Is Actually in a Joint Supplement
Almost every product in this category is built from the same short list of ingredients. Knowing what each one is supposed to do makes the labels comparable.
- Glucosamine – an amino sugar used as a building block in cartilage. The most common ingredient, usually listed as glucosamine hydrochloride or sulfate.
- Chondroitin sulfate – a larger molecule that often appears alongside glucosamine; brands usually name their source (Cosequin lists FCHG49 and TRH122).
- ASU (avocado/soybean unsaponifiables) – a plant extract included in Dasuquin alongside glucosamine and chondroitin.
- MSM – a sulfur compound used in liquid formulas such as LiquidHealth's Joint Purr-Fection.
- Omega-3 fatty acids – included in several products here for skin, coat and general wellness support.
What separates a good product from a cheap one is not the length of the ingredient list but the dose per serving: a tablet with 50 mg of glucosamine is not equivalent to one with 250 mg, even if both say "with glucosamine" on the front.
Signs a Cat Might Benefit
Cats hide discomfort well, so the signs are behavioural more than obvious: hesitating before a jump, jumping down instead of up, sleeping more, grooming less, or snapping when a hip is touched. A stiff gait after rest that loosens with movement is the classic pattern. Any of these deserves a vet exam first – arthritis, dental pain and soft-tissue injury can look identical from the outside, and only a vet can tell them apart.
The 5 Best Joint Supplements for Cats
Nutramax Cosequin for Cats Soft Chews (60 Count, 2-Pack)
Best Overall
4.4/5 from 11,684 Amazon ratings. The largest owner base in the category, and the product most owners start with. Each chew combines glucosamine hydrochloride (FCHG49) and sodium chondroitin sulfate (TRH122) with omega-3 fatty acids for skin and coat. Nutramax describes Cosequin as the #1 veterinarian recommended retail joint health supplement brand – that is the company's own claim, not an independent ranking. The soft chew format is the reason it works in practice: a cat that will not swallow a capsule will usually eat a chew.
- Pros
- Very large owner base
- Named glucosamine and chondroitin sources
- Soft chew is easy to give daily
- Omega-3s included
- Cons
- Two-pack is a long commitment
- Some cats refuse the chew texture
- Premium price per dose
Nutramax Dasuquin for Cats (84 Soft Chews)
Best Premium
4.4/5 from 1,797 Amazon ratings. The step up from Cosequin, from the same manufacturer: glucosamine and chondroitin plus ASU (avocado/soybean unsaponifiables), boswellia serrata extract, green tea extract and omega-3s. More ingredients is not automatically better, but ASU and boswellia are the two additions most often discussed for joint support, and this is the product that combines them with a named glucosamine source. Choose it if your vet has suggested a broader formula, not simply because it costs more.
- Pros
- ASU, boswellia and green tea in one chew
- Same manufacturer as the top pick
- Omega-3s included
- Soft chew format
- Cons
- Highest cost per chew here
- Only 1,797 ratings
- Sold as a two-pack
LiquidHealth Pets Joint Purr-Fection (2 oz)
Best Liquid
4.4/5 from 2,488 Amazon ratings. The answer for cats that will not eat chews or capsules: a dropper into the mouth or over food, with glucosamine, chondroitin, hyaluronic acid and Opti-MSM in a beef-gravy base. The maker states the formula is free from sugar, starch, salt, wheat, gluten, yeast and milk, which matters if your cat also has a sensitive stomach. Dosing is by weight on the label – measure it, because a liquid is easy to over-serve.
- Pros
- No chewing required
- Glucosamine, chondroitin, MSM and hyaluronic acid
- Free of common filler allergens per the label
- Easy to adjust the dose
- Cons
- Liquid needs refrigeration after opening
- Beef flavour is not universally accepted
- Dropper dosing takes two hands
Nutramax Cosequin Capsules (80 Count, 4-Pack)
Best Capsule
4.1/5 from 1,247 Amazon ratings. The same glucosamine and chondroitin formula as the top pick, in a capsule. That is useful for two kinds of cat: the one that eats chews too fast to notice a capsule hidden in wet food, and the one that refuses chews entirely – the capsule can be opened and the powder mixed into a strong-smelling meal. Capsules are also easier to split for a small cat's dose. The rating is slightly lower than the chew version, mostly complaints about capsules arriving damaged.
- Pros
- Capsule can be opened and mixed into food
- Same formula as the chew version
- Easy to split for smaller doses
- No chew texture to refuse
- Cons
- Lowest rating in this guide
- Powder tastes bitter if not masked
- Four-pack is a large purchase
NOW Pets Joint Support Chewable Tablets (90 Count)
Best Value
4.4/5 from 227 Amazon ratings. The budget option with the best quality credential: NOW Pets is certified by the National Animal Supplement Council, an industry body that audits manufacturing and labelling – a check most supplements in this category do not carry. The chewable tablets are designed for both cats and dogs, which means the dose per tablet is set for a range of animals, so read the cat portion carefully. Fewer ratings than the leaders, but the price per serving is the lowest here.
- Pros
- NASC-certified manufacturing
- Lowest cost per serving
- 90 tablets per bottle
- Chewable, no pill-popping
- Cons
- Only 227 ratings
- Dose is shared with dogs – measure for cats
- Tablet is large for a small cat
| Product | Format | Key ingredients | Servings | Rating |
|---|---|---|---|---|
| Cosequin Soft Chews | Soft chew | Glucosamine, chondroitin, omega-3 | 60 x 2 | 4.4 (11,684) |
| Dasuquin | Soft chew | + ASU, boswellia, green tea | 84 x 2 | 4.4 (1,797) |
| LiquidHealth Purr-Fection | Liquid | Glucosamine, chondroitin, MSM, HA | 2 oz x 2 | 4.4 (2,488) |
| Cosequin Capsules | Capsule | Glucosamine, chondroitin | 80 x 4 | 4.1 (1,247) |
| NOW Pets Joint Support | Chewable tablet | Joint support blend, NASC | 90 | 4.4 (227) |
Rating counts are as shown on Amazon on 27 October 2026. Serving counts are per pack as listed by the seller.
Chews, Capsules or Liquid?
The best supplement is the one your cat actually takes every day. Chews win for most owners because they double as a treat and need no preparation. Capsules are the fallback for cats that refuse chews – open them over wet food, but use a strong-smelling food, because glucosamine powder is bitter. Liquid is the easiest to dose precisely and the hardest to give to a cat that fights a dropper.
Whichever format you choose, give it with food and keep the timing consistent. A supplement given sporadically tells you nothing about whether it helps.
What Supplements Cannot Do
Joint supplements are not painkillers and they do not rebuild a damaged joint. They are a support product, usually started alongside weight management, gentle exercise and – where a vet recommends it – prescription pain relief. Three things matter more than any supplement:
- Weight. Every extra pound is load on the joints. A lean cat moves better, full stop.
- Environment. Steps to the sofa, a low-entry litter box and a warm bed reduce the daily strain on a stiff cat. Our cat stairs guide covers the practical options.
- Veterinary diagnosis. Arthritis in cats is under-treated because the signs are subtle. An exam and, where needed, imaging tell you what you are actually managing.
A note on claims: supplement labels in the US cannot claim to treat or prevent disease, and none of the products here do. If a brand promises to cure arthritis, that is a reason to walk away.
Frequently Asked Questions
Do joint supplements actually help cats?
The evidence in cats is thinner than in dogs, and effects are modest at best. Glucosamine and chondroitin are widely used and generally well tolerated, but they are support products, not treatment. Judge them over eight to twelve weeks, alongside weight control and a vet's diagnosis – not over a week.
When should I start a joint supplement?
Most owners start when they notice hesitating before jumps, stiffness after rest, or less grooming – typically from around seven years old, or earlier in large cats. Ask your vet at the annual exam whether a supplement is worth trying, and rule out other causes of stiffness first.
Can I give a dog joint supplement to my cat?
No, unless the label explicitly covers cats and gives a feline dose. The ingredients are often similar, but the dose per tablet is set for a much larger animal, and some dog products contain ingredients not evaluated for cats. The NOW Pets tablets here are labelled for both, with a separate cat portion.
How long until I see a change?
Give it eight to twelve weeks at a consistent daily dose before deciding. If there is no change in mobility, grooming or willingness to jump, stop – there is no benefit in continuing indefinitely. If there is improvement, keep the same product and dose rather than rotating brands.
Are these supplements safe with other medication?
Ask your vet before combining a supplement with any prescription, especially pain relief, steroids or thyroid medication. Glucosamine is not risk-free in cats with diabetes or kidney disease, and liquid formulas can contain ingredients your cat does not need. Bring the label to the appointment.
Bottom Line
Start with Cosequin soft chews if you want the safest default: a named glucosamine and chondroitin source, omega-3s, and the biggest owner base in the category. If your cat will not eat chews, the LiquidHealth dropper is easier to dose and the Cosequin capsules can be opened over wet food. Dasuquin is the choice when your vet has suggested a broader formula with ASU and boswellia, and NOW Pets is the value option with the best manufacturing credential.
None of these replace the two things that matter most: keeping your cat lean, and getting a diagnosis before you treat. A supplement is a supporting act.