Joint Supplements for Horses

Daily joint supplements for horses, made in the UK with human-grade ingredients. Every 32g scoop of Hip & Joint Horse gives over 10,000mg each of glucosamine and MSM, plus chondroitin and hyaluronic acid, and we make two glucosamine-free, laminitic-friendly versions too. From 64p a day.

Which joint supplement is right for my horse?

Amounts per 32g scoop, the recommended daily amount for a 500kg horse.

Everyday choiceHip & Joint Horse PremiumPowder, added to feed

Best for: horses in work, competition horses and older horses starting to stiffen up.

  • Glucosamine10,175mg
  • MSM10,175mg
  • Chondroitin2,544mg
  • Hyaluronic acid254mg
ExtraChia seed, vitamins C and E, methionine and lysine.
Cost per day£1.38 – £1.79
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+ SerrapeptaseHip & Joint Horse PLUSPowder, added to feed

Best for: horses that need a little extra support.

  • Glucosamine10,175mg
  • MSM10,175mg
  • Chondroitin2,544mg
  • Hyaluronic acid254mg
ExtraSerrapeptase (85mg), a natural enzyme, plus the Premium base.
Cost per day£1.44 – £2.30
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Laminitic friendlyHip & Joint Horse Glucosamine FreePowder, added to feed, no glucosamine

Best for: horses with laminitis, insulin resistance or Cushing's (PPID).

  • GlucosamineNone
  • MSM17,216mg
  • Chondroitin3,228mg
  • Hyaluronic acid323mg
ExtraMore MSM, chondroitin and HA in every scoop, plus the Premium base.
Cost per day£1.28 – £1.60
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Laminitic friendly + SerrapeptaseHip & Joint Horse PLUS Glucosamine FreePowder, added to feed, no glucosamine

Best for: laminitic, IR or PPID horses that need a little extra support.

  • GlucosamineNone
  • MSM17,216mg
  • Chondroitin3,228mg
  • Hyaluronic acid323mg
ExtraSerrapeptase (107mg), a natural enzyme, plus the Glucosamine Free base.
Cost per day£1.42 – £2.04
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Cost per day is at the recommended amount; the lower figure is for the 2kg tub. On the maintenance amount (half a scoop) it costs half as much, from 64p a day.

Not sure? Start with Hip & Joint Horse Premium. If your horse has laminitis, insulin resistance or Cushing's, choose Glucosamine Free, and check with your vet before changing their diet.

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6 products
Hip and Joint Horse Premium supplement tub in a stable with a horse behind
Winston and Porter Hip and Joint Horse Premium joint supplement tub
Hip & Joint Horse Premium
from £27.95
Hip and Joint Horse PLUS supplement tub on a tack trunk in a stable yard
Winston and Porter Hip and Joint Horse PLUS joint supplement tub
Hip & Joint Horse PLUS
from £35.95
Hip and Joint Horse glucosamine-free supplement tub on straw with a horse behind
Hip and Joint Horse glucose-free, laminitic-friendly joint supplement tub
Hip & Joint Horse Glucosamine Free – Laminitic Friendly
from £24.95
Hip and Joint Horse PLUS glucose-free supplement tub on straw with a horse behind
Hip and Joint Horse PLUS glucose-free, laminitic-friendly supplement tub
Hip & Joint Horse PLUS Glucosamine Free – Laminitic Friendly
from £31.95
Winston and Porter pure distilled MSM for horses and ponies, 1kg pouch
Saddled chestnut horse
Pure MSM for Horses & Ponies | Winston & Porter
from £51.40
Day-2-Day horse feed balancer tub in a field with horses
Winston and Porter Day-2-Day equine feed balancer tub
Day-2-Day Horse Feed Balancer | Winston & Porter
from £31.95

What's in our horse joint supplements

Glucosamine

A natural building block of cartilage. (Not in our Glucosamine Free formulas.)

MSM

Methylsulfonylmethane, a natural source of sulphur, which the body uses to build connective tissue.

Chondroitin

A major component of cartilage.

Hyaluronic acid

A natural part of the fluid that lubricates the joints.

Serrapeptase

A natural enzyme, in our PLUS formulas only.

Supporting nutrients

Chia seed, vitamins C and E, methionine and lysine round out every formula.

We print the exact amount of every ingredient on each product page, so you can compare us with any other brand. Prefer to add MSM on its own? Try our Pure MSM for Horses & Ponies.

How much to feed and how long a tub lasts

The recommended amount is one level 35ml scoop (32g) a day for a 500kg horse. For maintenance, give half a scoop (16g) a day. You can give two scoops a day for the first 7 days as a loading dose.

500g16 days31 days on maintenance
1kg31 days62 days on maintenance
2kg62 days125 days on maintenance

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Safe for competition horses

None of our horse joint supplements contain any ingredient on the FEI Equine Prohibited Substances List (checked November 2026). They contain MSM (methylsulfonylmethane), not DMSO, which is a controlled medication.

Frequently asked questions

Is glucosamine suitable for laminitic horses?
Many owners and vets prefer to avoid glucosamine for horses with laminitis, insulin resistance or Cushing's. That's why we make our Glucosamine Free formulas. As with any change to the diet of a horse with laminitis, please check with your vet first.
What's the difference between Premium and PLUS?
They're the same formula. PLUS has serrapeptase, a natural enzyme, added.
Can I feed it alongside other supplements or medication?
If your horse is on medication, is injured or has an ongoing health condition, please check with your vet before adding any supplement.
Where are your supplements made?
In the UK. Winston & Porter has been making joint supplements for dogs and horses since 2016, using human-grade ingredients.

Why Winston & Porter?

Made in the UK with human-grade ingredients.

Exact ingredient amounts on every product page, nothing hidden.

Glucosamine-free, laminitic-friendly options.

Over 20 years' experience in the industry.

Want to know more?

Read our guides, or get in touch and we'll help you choose the right supplement for your horse.

Contact usHorse supplement FAQs
Best horse joint supplements UKHorse joint health guideHorse supplement FAQs

Our supplements are nutritional supplements and are not intended to diagnose, treat, cure or prevent any disease.