9 Best Supplements for Senior Dogs in 2026, Recommended by Vets
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All products in this article have been reviewed by our trusted vets and experts. PetMD is owned by Chewy.
Senior dogs may develop age-related changes or medical conditions that affect their nutritional needs. With your veterinarian’s approval, a targeted supplement may complement your senior dog’s diet and overall care plan. However, senior dogs do not automatically need supplements, and new changes in appetite, weight, mobility, activity, or behavior should be evaluated by a veterinarian.
The best senior dog supplements are vet recommended, backed by clinical trials and research, and in a form your dog will reliably take. They may support your dog’s immune system, joint health, heart and liver health, cognitive function, eyesight, skin, and more.
Our expert panel of veterinarians rounded up their top picks for the best supplements for senior dogs. They’ve outlined which products they recommend for specific needs while considering taste, quality, ingredients, and dosage.
What To Consider When Shopping for Senior Dog Supplements
The best supplement for senior dogs will depend on your dog’s current health, medical predispositions of their breed, ingredients, form, palatability, and the quality of the product. Supplements can vary widely in their effectiveness and quality. Keep the following factors in mind before you buy:
Quality Control and Safety Standards
Look for reputable brands that provide clear labeling, defined amounts of active ingredients, and transparent information about their manufacturing and quality-control practices. Third-party testing may help verify a product’s ingredients, purity or consistency, although testing alone does not establish that a supplement will be clinically effective.
The National Animal Supplement Council (NASC) Quality Seal is one useful indicator of quality-control standards. Companies displaying the seal must meet requirements related to manufacturing procedures, labeling, adverse-event reporting, independent audits, and random product testing. However, the seal is not a guarantee that a product will work for every dog or that it is appropriate for your dog’s individual health needs.
Products without the NASC seal may still have strong quality-control and testing practices, so the absence of the seal does not automatically mean a supplement is unsafe. When possible, look for brands that are transparent about their ingredients, manufacturing process, testing procedures, and product expiration dates.
Research-Backed Ingredients
Check that the active ingredients have research supporting their intended use. For example, glucosamine, chondroitin, and MSM (methylsulfonylmethane) are well known for providing joint support.
Form and Palatability
Form and palatability also matter for senior dog supplements, as chews are often easier for dogs to accept, while powders or capsules may suit picky eaters or dogs with specific dietary needs.
Your Dog’s Individual Needs
Senior dog supplements are not one-size-fits-all. Choose a product based on your dog’s specific health goal, medical history, diet, medications, allergies and your veterinarian’s recommendation.
A probiotic may be considered for some gastrointestinal concerns, but benefits can vary by product and microorganism. Probiotics should not be presented as a general treatment for anxiety, and new or worsening anxiety or behavior changes in a senior dog should be evaluated by a veterinarian.
Marine-derived omega-3 fatty acids containing EPA and DHA may support joint function, while certain DHA-containing diets or formulations may support cognitive health. Your veterinarian can help determine whether a specific product, dose, and formulation are appropriate for your dog.
If your dog has known food allergies or dietary restrictions, review the complete active and inactive ingredient list before use. Many supplements contain added animal proteins, flavorings, or other ingredients that may not be appropriate for every dog.
Veterinarian Guidance
Veterinarian guidance is especially valuable for choosing an appropriate supplement, determining the dose, and avoiding potential interactions. Speak with your veterinarian before starting any supplement, particularly if your senior dog has a chronic medical condition or takes prescription medications.
Provide your veterinarian with a complete list of all medications, supplements, vitamins, and herbal products your dog receives. Do not combine multiple supplements without reviewing their ingredients with your veterinarian, since products may overlap or contribute excessive amounts of certain nutrients.
How We Chose the Best Supplements for Senior Dogs
This list of the best supplements for senior dogs was meticulously curated by a panel of veterinarians and veterinary technicians who are employed by Chewy, the publisher of PetMD. They were asked to choose the best senior dog supplements in their honest opinion, across multiple categories based on the following:
- Brand reputation
- Clinical trials and science-backed research
- Nutritional value
- Palatability
Opinions and product recommendations in this article belong solely to the review panel of vets and animal health experts. Manufacturers and vendors cannot buy placement in Vet Verified content or exert influence on our panelists as they evaluate products.
Our sole goal with this program is to provide pet parents with the information they need to make the best decision for their pets.
Senior Dog Supplements FAQs
What is the best supplement for an older dog?
There’s no single best supplement for every older dog. The best supplement for an older dog depends on your specific dog’s age and health concerns. Joint supplements may be appropriate for senior dogs with osteoarthritis, stiffness, or other mobility concerns, but they should be selected based on the dog’s individual health needs and veterinary evaluation.
Should you give your senior dog supplements?
Whether you should give your senior dog supplements depends on your dog’s individual health and nutritional needs. For example, many senior dogs may benefit from joint supplements to help with mobility, as that is a common issue among older dogs. Other supplements can help support cognitive, skin and coat, or digestive health. Your veterinarian can recommend appropriate supplements based on your dog’s age, diet, health, and medications.
When should I start giving my dog senior supplements?
There’s no single age when dogs should start taking senior supplements. Joint supplements may be considered depending on a dog’s size, breed, and individual needs, while other supplements may be appropriate based on specific health or nutritional needs. Your veterinarian can help determine what’s appropriate as your dog ages.
How can I help my senior dog's brain and cognitive function?
You can support your senior dog’s brain and cognitive function by feeding them a balanced diet appropriate for their life stage and ensuring they get adequate exercise and mental stimulation. You can also talk to your vet about adding an omega-3 supplement or a cognitive-specific senior dog supplement to help support your dog’s cognitive function as they age.
What are the best joint supplements for senior dogs?
The best joint supplements for senior dogs include ingredients like glucosamine, chondroitin, and omega-3 fatty acids. Our vet panel recommends Nutramax Dasuquin as the best overall supplement for senior dogs. Nutramax Cosequin is also a highly vet-recommended joint supplement for senior dogs.