Joint supplements for dogs mostly list the same handful of ingredients, which makes them look interchangeable. They are not, and the difference is usually in the amounts rather than the names.
Here is what is normally in the tub, what each thing actually is, and how to read a label so you can compare two products properly.
The usual ingredients
Glucosamine
An amino sugar that occurs naturally in cartilage. In supplements it is usually supplied as glucosamine hydrochloride or glucosamine sulphate, often derived from shellfish shells, though vegetarian versions produced by fermentation exist. It is the ingredient most people recognise and the one most often used as the headline number on a label.
Chondroitin
Chondroitin sulphate is another compound found naturally in cartilage and connective tissue. It is commonly paired with glucosamine, and it is also one of the more expensive ingredients — which is why some cheaper products include only a token amount.
MSM
Methylsulfonylmethane, an organic compound that provides sulphur. Sulphur is a component of various structural tissues in the body. MSM is inexpensive and appears in most joint formulations.
Green-lipped mussel
An extract from a shellfish native to New Zealand. It is a natural source of omega-3 fatty acids and of glycosaminoglycans, the family of compounds that includes chondroitin. It costs considerably more than the synthetic ingredients, so its presence — and the amount — is a reasonable signal of how a product has been put together.
Turmeric
A root used in cooking for centuries, containing a group of compounds called curcuminoids. Curcumin is poorly absorbed on its own, which is why some formulations pair it with black pepper extract.
How to read the label
Three things separate a serious formulation from a decorative one.
Amount per chew, not per tub. Marketing sometimes quotes the total across the whole container, which sounds impressive and tells you nothing. What matters is how much your dog gets in a day.
Amount per daily serving, not per chew. A product that looks weaker per chew may be fed at four chews a day rather than one. Work out the daily figure before comparing.
Named quantities, not a bare list. If a label names five ingredients but only quantifies one of them, assume the others are present in small amounts. That is not necessarily dishonest — it is just how a lot of products are built.
Chews, powders or tablets?
Largely a question of whether your dog will take it every day without a fight.
- Soft chews — taken as a treat by most dogs, easy to give away from mealtimes, easy to count. Contain some binders and flavouring to hold them together.
- Powders — mixed into food, usually the cheapest per dose, but fussy dogs notice and some of it stays in the bowl.
- Tablets — precise, but you are back to hiding pills in cheese.
The best format is whichever one you will still be giving in four months, because that is the timescale supplements are fed over.
Feeding by weight, and sticking with it
Dosing is by bodyweight, so a Cocker Spaniel and a Labrador on the same product will be on different daily amounts. Underfeeding a small dose to a large dog is a common and easy mistake.
Supplements are also fed continuously rather than on bad days. Owners who give them intermittently, when they remember or when the dog seems stiff, are not really giving them a fair run.
Our dosage calculator takes your dog’s weight in kilos or pounds and gives the daily number of chews, plus how long a 120-chew tub will last at that rate.
Two safety points
Do not use human supplements. Dosing differs, and some human products contain xylitol as a sweetener, which is dangerous to dogs.
Tell your vet what you are giving. Particularly if your dog is on any prescribed medication. Take the tub to the appointment rather than trying to remember the ingredients.
What we make
Biotic’s Gain Hip & Joint soft chews contain glucosamine, chondroitin and MSM alongside green-lipped mussel and turmeric, in a chicken-flavour heart-shaped chew, 120 to a tub. Feeding is by bodyweight: 1 chew up to 10lb, 2 for 11–39lb, 3 for 40–79lb and 4 for 80lb and over. You can see the range on our pet supplements page.
Before buying anything, it is worth reading our guide to the signs of joint stiffness and what causes it — weight and exercise habits do more than any supplement will.
These are general care tips, not veterinary advice. If you are worried about your dog, speak to your vet.
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