VETS INSIDER
The Joint Ingredient New Zealand Vets Have Used for 40 Years (And Why It's Missing From Most American Supplements)
New research is changing what veterinarians recommend for senior dog joint pain. Here's what to look for, and which supplements getting it right.
By Dr. Amelia Hart, DVM, DACVIM
May 01 2024 at 9:17 am EDT
Senior dog joint pain is one of the hardest things to watch as an owner.
The hesitation at the stairs, the missed jumps, the slow mornings.
Most dogs hide it for as long as they can and once you start seeing it, you want to do something.
After fifteen years in practice, I can tell you the choice you make next matters more than most owners realize.
Most of the popular hip and joint supplements aren't built to address what's actually causing the pain.
A few years ago, I caught a session at the WVC conference that ended up changing how I treat every senior dog who comes through my door.
A researcher from New Zealand was presenting clinical data on a marine ingredient she'd been using for over 40 years.
It was foreign to vet practices here in the US and her trial results were better than anything I'd seen before.
I sat through the entire session, took six pages of notes, and went home that night and started reading the published literature.
What I found was a body of veterinary research mostly from New Zealand and Australia that American supplement brands haven't picked up on.
Vets in those countries had been using it as a primary joint ingredient since the 1980s.
The clinical data was substantial.
The mechanism made sense.
And the ingredient was missing from the products I'd been recommending to my own patients for fifteen years.
That conference is where I started over.
The first thing to understand is where senior dog joint pain actually comes from.
Most owners have been taught to think of it as a wear-and-tear problem.
The cartilage is the smooth, cushioning tissue that lines the inside of every joint.
This cartilage in your dog's joints wears down over the years, as it thins, the bones underneath start to grind against each other, and that's where the pain comes from.
The daily pain your senior dog is feeling.
The stiffness in the morning...
The hesitation at the stairs....
The way she takes a moment before standing up...
It isn't really coming from the wear and tear itself.
It's coming from inflammation in the tissue around the joint.
And a lot of that inflammation isn't just "old age".
It's been quietly building up in your dog's body for years, fed by their diet.
Most modern dog foods are heavy in the kinds of fats that promote inflammation, and very light in the kinds that fight it.
Over a decade of meals, that imbalance becomes a chronic, low-grade fire in the body.
Joints take the brunt of it because they're already under stress.
So you end up with a senior dog whose body has been quietly inflamed for years.
And now their joints are paying the price every single morning.
Standard hip and joint supplements are mostly built around helping the body maintain cartilage.
They only help with inflammation on the surface.
The deeper inflammation, the kind that's making the cartilage damage hurt every single day needs something different to reach it.
That's why so many owners report that the supplements seem to help "a little" but never produce the dramatic improvements they're hoping for.
The supplements aren't broken.
They're just not doing the whole job.
The inflammation side needs a completely different kind of ingredient.
And it turns out the ingredient that works best is one most American dogs are completely deficient in.
A marine ingredient that contains a specific combination of omega-3s and natural anti-inflammatory compounds.
It's called green-lipped mussel.
And once I understood why it worked, it became obvious why most of the popular supplements were producing such modest results.
Glucosamine, chondroitin, and MSM are the active ingredients in nearly every popular hip and joint product on the market.
Cosequin and Dasuquin are built around the same handful of compounds.
And here's the limitation.
They give the body the building blocks to maintain cartilage but the anti-inflammatory functions are insufficient.
Think of it like trying to put out a fire by misting it with a spray bottle.
You'll cool the surface a little.
But you won't put out the fire.
That's what's happening when an owner gives a senior dog supplements containing these compounds.
The other approach owners ask me about is prescription anti-inflammatories.
Carprofen, Rimadyl, Meloxicam.
These do reach the deeper inflammation, and for some dogs they're necessary.
But they come with real costs.
The most common being kidney and liver strains.
Which is why I try to avoid this medication, especially to a dog who's already in her senior years.
None of these approaches are wrong.
They each address part of the picture.
But none of them, alone or in combination, deliver what a senior dog's joints actually need.
Something that reaches the deeper inflammation, supports the cartilage, and does it without the side effects of pharmaceutical drugs.
That's where green-lipped mussel comes in.
What Green-Lipped Mussel Actually Does
Green-lipped mussel is a shellfish that grows wild along the New Zealand coastline.
What makes it different from any other shellfish is its unique combination of compounds.
It contains a rare type of omega-3 fat that fish oil doesn't have.
It contains the natural building blocks of cartilage in a form the body can use directly.
And it contains a group of antioxidants that work together with the omega-3s to calm deep inflammation throughout the body.
No other single ingredient in the supplement world delivers all three at once.
But here's where it gets complicated.
Once I knew what green-lipped mussel was, I assumed I could just look for any supplement containing it and recommend that.
I was wrong.
The active compounds in green-lipped mussel are fragile.
They break down with heat.
The standard way of processing shellfish for supplements involves drying it at high temperatures, which is fast and cheap.
This destroys most of what makes the ingredient work in the first place.
By the time it gets ground into powder and put into a chew, a lot of the omega-3s and antioxidants are gone.
The version that actually works is one that's processed differently.
At low temperatures, often called "cold-stabilized".
This preserves the compounds intact.
It is more expensive to produce, which is why most American supplement brands don't use it.
They use the cheaper, heat-processed form.
Get a lower-quality ingredient.
And pass the cost savings on to the consumer at the expense of the product's actual effectiveness.
In the supplement world, the gold-standard extraction process of green-lipped mussel is from GlycOmega™.
It's the version used in most of the published clinical research, and recommended by expert vets across New Zealand and Australian.
If a senior dog joint supplement is going to actually deliver on the green-lipped mussel research, it should contain GlycOmega™ specifically.
Not just generic green-lipped mussel powder.
What I see consistently with senior dogs whose owners switch to a properly-sourced green-lipped mussel formulation is the return of small, specific things.
Within the first week or two, the small daily struggles start softening.
Owners notice their dog stops slipping on the kitchen floor when they gets up.
The back legs are gripping again because the deeper inflammation has started to ease.
And the muscles around their hips can do its job.
The morning stiffness is shorter.
They gets up more smoothly.
By three or four weeks, the bigger things start coming back.
The walks she'd been cutting short start lasting longer.
She starts jumping off the bed again instead of whining at the edge of it.
She starts following her owner from room to room in a way she'd quietly stopped doing months earlier.
And owners often tell me she's started meeting them at the door again.
That last one is the one that breaks people open.
They didn't realize how much they'd missed it until it came back.
The Senior Dog Joint Supplement
Worth Your Attention
Within my practice, this is the main supplement I recommend to all my clients with senior dogs experiencing joint pain.
The brand is Pawsy.
The reason I personally recommend this particular supplement is because they're the only product I've found that meets every standard I've laid out in this article.
They use GlycOmega™ green-lipped mussel.
The dose is 300mg per serving, which is in the range that the clinical research actually supports.
It also contains glucosamine, MSM, and a complete antioxidant stack — every component reinforces the others.
It comes in a soft chew that dogs actually eat.
The per-day cost is a fraction of what you'd pay for Cosequin or Dasuquin, as well as the other alternatives on the market.
If your senior dog is showing signs of slowing down and the standard supplements haven't been producing the changes you hoped for, this is the one I'd recommend.
Pawsy Hip and Joint Chew →
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