Dog is Human have also sent me their MULTIFLEX Advanced Hip & Joint supplement to use with my own dog. This review is based on what the brand claims, what’s actually in the powder, and what other dog owners are already seeing. I’ll follow up with a separate post after a proper multi‑week trial sharing exactly what happens with my own dog. Some of the links in this article are affiliate links, which means I may earn a small commission if you choose to buy, at no extra cost to you.
Quick refresher: who are Dog is Human?
Dog is Human is a US‑based pet wellness company built around the idea that dogs should get the same standard of care we expect for ourselves. Their whole angle is “Pioneering Human‑Grade Pet Health” – human‑grade ingredients, vet‑formulated products and a big focus on real outcomes like less itching, better movement and healthier digestion.
They work with veterinarians, animal nutrition specialists and medical professionals on their formulas, and they’re open about the ingredients and doses they use. Across their site and social media they feature tens of thousands of verified reviews from dog owners talking about improvements in things like mobility, stiffness, skin and overall comfort.
As with the multivitamin, I’m not interested in hype – but that combination of clear mission, vet input, human‑grade positioning and a lot of real‑world feedback is enough for me to give the hip and joint supplement a fair test.
What is MULTIFLEX Advanced Hip & Joint?
Dog is Human MULTIFLEX is a human‑grade hip and joint supplement powder that you sprinkle on your dog’s food once a day. It comes in single‑serve stick packs and is designed to support mobility, flexibility and long‑term joint health in one daily portion.
The product is:
- 100% human‑grade
- Vet‑formulated for dogs that are starting to slow down or already have age‑related stiffness
- Designed to target four “root causes” of joint discomfort rather than just masking symptoms
- Made to be used long‑term alongside their DM‑01 Daily Multivitamin (they’re explicitly formulated to work together)
In other words, this is meant to be the more targeted joint piece, while the multivitamin covers broader daily health.
How you give it and how long it’s supposed to take
MULTIFLEX is a powder you pour over your dog’s normal food at mealtime. The serving is simple:
- Half a stick per day for dogs up to 25 lbs
- One full stick per day for dogs over 25 lbs
Dog is Human say that with consistent daily use, most dogs start to feel early relief in stiffness and general comfort within 4–6 weeks, with more noticeable changes in how easily they move, walk, climb stairs and play over the following weeks. This is not an “instant fix” – it’s clearly positioned as a daily joint support routine.
MULTIFLEX ingredients, in plain English
Dog is Human keep the ingredient list for MULTIFLEX tight and focused. Each 2.0 g stick pack contains six active, clinically‑backed joint ingredients, plus one inactive ingredient for flavour:
Active ingredients per stick:
- Glucosamine HCl (800 mg) – supports cartilage and joint lubrication, helping joints move more comfortably.
- MSM (300 mg) – a natural sulphur compound that helps reduce inflammation, stiffness and joint or muscle discomfort.
- Chondroitin sulfate (200 mg) – helps cushion and protect joints by maintaining water and elasticity in cartilage, and may slow cartilage breakdown over time.
- Bone broth (150 mg) – bovine‑sourced, adds collagen and amino acids that support joint tissues and overall joint health.
- Boswellia serrata extract (60 mg) – a plant extract with natural anti‑inflammatory properties, often used to help reduce stiffness, swelling and joint discomfort.
- UC‑II collagen (40 mg) – a patented form of undenatured type II collagen used at a low, clinically studied dose to help reduce joint pain and improve mobility in dogs.
Inactive ingredient:
- Beef liver – for palatability so dogs actually want to eat it.
Dog is Human are clear that their veterinary team built MULTIFLEX “around six key ingredients that are essential for long‑term joint health and mobility”, rather than padding it out with extras for the sake of a longer label.
What Dog is Human says MULTIFLEX can help with
According to Dog is Human, MULTIFLEX is designed to go beyond basic joint care and target several underlying drivers of stiffness and discomfort. Their claims focus on:
- Comfort and stiffness: easing stiffness, especially after rest, and making it easier for dogs to get up, lie down and move around without obvious discomfort.
- Mobility and movement: helping daily activities like walking, climbing stairs, jumping into the car and playing feel smoother and more natural.
- Long‑term joint health: supporting cartilage, connective tissue and joint lubrication to keep dogs more comfortable as they age, rather than waiting until they’re already struggling.
- Quality of life: keeping aging or slowing dogs active, engaged and able to enjoy their usual walks and playtime for longer.
They break down expected results something like this:
- Weeks 1–2: early relief – stiffness starts to ease and dogs hesitate less when getting up or lying down.
- Weeks 3–4: daily walks, stairs and play feel easier as discomfort continues to ease.
- Weeks 5–7 and beyond: flexibility and confidence improve further, with more natural movement and a renewed interest in activity.
Again, these are the brand’s own timelines – but they give a realistic picture that proper joint support is a medium‑term game, not something you judge in 48 hours.
What other dog owners are already reporting
Looking at Dog is Human’s marketing, landing pages and social content around MULTIFLEX, plus third‑party chatter, you see some consistent themes in real‑world feedback:
- Dogs that were stiff after lying down getting up more easily and moving more freely after a few weeks.
- Older dogs showing more interest in walks and play again, with people saying their dog seems “younger” or “more like their old self”.
- Owners noticing less limping or favouring of one leg after being on the powder for a while.
- People appreciating the once‑a‑day powder format that mixes into food, especially for dogs who are fussy with chews.
You’ll also see the kind of before‑and‑after stories Dog is Human highlight on their own pages: dogs who were sleeping more and moving less now running and playing again after being on MULTIFLEX for 60 days or so. As always, individual results vary – some dogs respond strongly to this kind of support, others only mildly – but there’s enough specific detail to suggest this is doing something for a lot of stiff, aging dogs.
Why I’m happy to put MULTIFLEX into a multi‑week trial
I’m not going to tell you MULTIFLEX works for my dog until I’ve actually used it. But looking at the company, the formula and the feedback so far, I am comfortable giving it a proper run.
- The ingredient list is exactly what I’d expect from a serious joint product: glucosamine, MSM and chondroitin for structural support, plus UC‑II collagen and boswellia for an extra anti‑inflammatory and mobility boost, rather than novelty ingredients.
- The dosing and timelines are realistic – they’re talking about 4–6+ weeks, not overnight miracles, which is how proper joint support works.
- It’s designed to sit alongside their Daily Multivitamin, so you can support both general health and joints without double‑dosing the same compounds in a random way.
On that basis, I’ve got no qualms putting MULTIFLEX into my dog’s routine for a meaningful period and seeing what, if anything, actually changes.
How I’ll test MULTIFLEX with my own dog
I’ll be trialling MULTIFLEX in a way that gives it a fair chance but stays grounded in everyday life.
Here’s the plan:
- Duration: At least 4 weeks of daily MULTIFLEX, given at the recommended dose for my dog’s weight (half a stick for small dogs, a full stick for larger dogs).
- Routine: Powder poured over one main meal each day so it’s easy to stick to and doesn’t turn into a chore.
- What I’ll track:
- How stiff my dog seems when getting up after rest
- Willingness to jump on the sofa, into the car or up steps
- How my dog handles walks – any limping, slowing down or reluctance
- General energy and interest in play
- Any changes in appetite or tummy issues (since we’re adding something new to food)
At the end of the trial, I’ll put together a separate, straight‑talking follow‑up review with what actually happened: what improved, what stayed the same and whether the changes were enough for me to keep MULTIFLEX in our routine.
If you want to dig into it more, you can check out the Dog is Human Multiflex Advanced Hip & Joint on their site and see the full ingredients and customer reviews for yourself.
Final thoughts (before we start)
Right now, this is a “what to expect” review, not a final verdict. On paper, Dog is Human MULTIFLEX looks like a serious hip and joint supplement: human‑grade, vet‑formulated, six well‑known joint ingredients at decent doses, in a simple daily powder. It’s clearly built for dogs that are slowing down a bit and for owners who want to do something proactive about joint health before things get worse.
The real test will be how my own dog moves, acts and feels after living with it for a few weeks. Once we’ve done that, I’ll share the results on Love Your Furry Friend – good, bad or “no major change” – so you can decide whether Dog is Human’s hip and joint supplement deserves a place in your own dog’s bowl.