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Free shipping over $100
10% off for two tiems
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Free shipping over $100
10% off for two tiems
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Free shipping over $100
10% off for two tiems
15% off for three tiems
Free shipping over $100
10% off for two tiems
15% off for three tiems
Free shipping over $100
10% off for two tiems
15% off for three tiems
Free shipping over $100
10% off for two tiems
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Free shipping over $100
10% off for two tiems
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Free shipping over $100

The 4-in-1 AdvancedApproach to Joint Health
Our veterinary team developed MULTIFLEX around six key ingredients that are essential for long-term joint health and mobility.
The 4-in-1 AdvancedApproach to Joint Health
Our veterinary team developed MULTIFLEX around six key ingredients that are essential for long-term joint health and mobility.
1. Rebuild & Cushion Cartilage
1. Rebuild & Cushion Cartilage
Adds the key nutrients and collagen that thickens and hydrates joint cartilage, so every step feels better cushioned.
- Glucosamine
- Chondroitin
- Collagen Peptides
2. Calm Inflammation
2. Calm Inflammation
Turns down key inflammation switches (NF-kB, COX-2) and neutralises free radicals – soothing stiff joints that feel hot, swollen, and sore.
- MSM
3. Supports Balanced Immunity
3. Supports Balanced Immunity
"Retrains" immune cells to stop over-reacting to joint cartillage, easing long-term irritation and supporting smoother movement.
- UC-II® Undernatured Collagen
4. Strengthen Connective Tissue
4. Strengthen Connective Tissue
Supplies natural collagen, amino acids, and sulfur compounds from bone broth and MSM — reinforcing tendons, ligaments, and cartilage so joints stay stable and resilient with every step.
- Bone Broth
- MSM
- UC-II

The Multiflex™ Difference
The Formulation
Made with only 7 essential ingredients.
Glucosamine HCI 【800 mg】
Glucosamine HCI 【800 mg】
Glucosamine Hydrochloride is a natural amino sugar that reduces joint pain for dogs. Glucosamine assists in joint lubrication, helps maintain healthy cartilage, and sustains connective tissue.
MSM 【300 mg】
MSM 【300 mg】
Methylsulfonylmethane (MSM) is a natural antioxidant that reduces inflammation, stiffness, and hip, joint, and muscle pain in dogs. MSM also provides additional protection against infection.
Chondroitin Sulfate (Bovine) 【200 mg】
Chondroitin Sulfate (Bovine) 【200 mg】
Chondroitin helps cushion and protect joints by maintaining water and elasticity in cartilage. It also slows cartilage breakdown to support long-term mobility.
Bone Broth (Bovine) 【150 mg】
Bone Broth (Bovine) 【150 mg】
Bone Broth provides natural collagen, amino acids, and minerals that strengthen cartilage, nourish connective tissue, and promote smoother joint movement.
Boswellia Serrata Extract 【80 mg】
Boswellia Serrata Extract 【80 mg】
Boswellia is a powerful plant extract with natural anti-inflammatory properties. It helps reduce stiffness, ease swelling, and support overall joint comfort.
UC-II® Collagen 【40 mg】
UC-II® Collagen 【40 mg】
UC-II® Collagen is a patented form of type II collagen clinically shown to improve joint health. It works with the immune system to protect cartilage, reduce discomfort, and enhance flexibility.
Other Ingredients
Other Ingredients
Beef Liver
Users are saying..
Frequently Asked Questions
At what age can my pup start using this?
At what age can my pup start using this?
MULTIFLEX™ is suitable for dogs of all ages and breeds. However, we do recommend dogs begin to incorporate the powder into their daily routine starting at an age of 6 months or older.
What does 100% Human-Grade mean?
What does 100% Human-Grade mean?
Most pet supplements from other brands contain palm oil, fillers, artificial flavoring, preservatives, etc. At Dog is Human, we’re raising the standards of pet health by only using the highest quality human-grade ingredients, which is what our best friends deserve.
How long until I start seeing the benefits?
How long until I start seeing the benefits?
The benefits most dogs feel—less stiffness, more flexibility, and renewed energy—are just the bonus on top of supporting their long-term joint health. When given consistently every day, most dogs begin to notice positive changes within 6–8 weeks.
How do I give the powder to my dog?
How do I give the powder to my dog?
Simply sprinkle the recommended daily amount over your dog’s food. Most dogs enjoy it and won’t even notice it’s there.