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We all want as many years with our St. Bernards as possible. As your St. Bernard ages, you may be looking for additional ways to support their health.

The following list of supplements is among the top recommended products for seniors. Bernards. As always, be sure to consult your own veterinarian before making any changes to your St. Bernard’s dietary or medical regimen.

1. Glucosamine & Chondroitin for Supporting Your Senior St. Bernard’s Aging Joints

Joint pain and arthritis are some of the most common ailments in aging. Bernard will face. Supplements containing glucosamine aid in replacing lost joint fluid, providing much-needed lubrication and cushioning to stiff, achy joints. Chondroitin sulfate has been shown to improve the structural integrity of joints by repairing damaged cartilage and preventing further cartilage breakdown.

You can learn more about the glucosamine and chondroitin supplement iHeartDogs recommends here.

2. Probiotics for Immune & Gut Support for Your Senior St. Bernard

Probiotics are supplements containing large doses of microorganisms. They promote a healthy GI tract by allowing the “good” bacteria in the gut to flourish. “Bad” bacteria often accumulate due to stress, illness, and prolonged use of medications. Since the majority of your senior dog’s immune system is located in the gut, probiotics also help to maintain health throughout the body.

We’d recommend looking into a 3-in-1 probiotic that also contains prebiotics and digestive enzymes. 

3. Omega-3 Essential Fatty Acids to Fight Inflammation & Reduce Itchy Skin for Your Senior St. Bernard

Older dogs may experience dry, itchy skin and dull, brittle coats. Adding Omega-3 and Omega-6 fatty acids to a senior dog’s diet can reduce inflammation and promote healthy skin and a soft, shiny coat. Omega-3 fatty acids also support healthy mobility and bone health. Additional benefits in the body include allergy support, heart health, strong brain function, and visual acuity.

Krill oil is one of the best sources of Omega-3 available, as it contains a special form of fatty acids that are more usable in your dog’s body. In addition, many high-quality krill supplements also contain a powerful compound called astaxanthin, an extremely potent antioxidant.

4. Milk Thistle for Your St. Bernard’s Liver & Kidney Support, Especially for Dogs Taking Pain Meds

Natural milk thistle is said to protect the liver from damage and may actually improve liver function. This is important for aging St. Bernards, especially those with existing liver problems and those taking medications known to be taxing on the liver. For example, any dog regularly taking an NSAID pain medication such as carprofen, Novox, Rimadyl, deracoxib, Deramaxx, firocoxib, Previcox, meloxicam, Metacam, grapipant, or Galliprant may need additional liver support. Make sure to discuss this with your vet.

5. Curcumin (from Turmeric) for Pain & Inflammation

This “wonder spice” is a derivative of turmeric and promotes brain and joint health in aging. Bernards. Some studies have suggested that turmeric can provide nearly the same pain relief as an NSAID drug. Lastly, curcumin is also known for its possible anti-tumor properties and in helping to support dental health.

Many high-quality hip and joint supplements, such as this one, contain turmeric in the formula.

6. Hemp Oil for Your Senior St. Bernard’s Pain & Inflammation

No discussion of senior dog supplements would be complete without discussing Hemp. In the last 5 years, several studies have begun to show great promise for Hemp in helping to alleviate joint pain, calm nervous dogs, reduce inflammation caused by allergies, and reduce seizures in epileptic pups.

We’d recommend a Hemp oil or Hemp chew that contains 0% THC, as well as using a product that is tested multiple times throughout the manufacturing process to ensure a pure and potent product. Here at iHeartDogs, we only sell and recommend the Cannanine brand.

7. Fiber for Your Senior St. Bernard’s Digestive Health

Senior dogs may experience changes in the lining of the intestines, which lowers their ability to digest and absorb the nutrients in their food. Adding healthy fiber to your older pup’s diet supports a healthy digestive system, combats constipation, and promotes overall health.

8. Extra-Protein for General St. Bernard Aging Support

As your St. Bernard’s body ages, it breaks down muscle and tissues at a faster rate than before. For this reason, aging dogs need extra protein in their diet (note: there are some exceptions, such as if your senior dog has chronic kidney disease, in which your vet may recommend a lower protein diet).

Many senior St. Bernard’s parents opt to add additional protein to their dog’s kibble, such as a cooked or raw egg, chicken breast, or a freeze-dried dog food topper. Surprisingly, most kibbles only contain around 20-30% protein, so boosting this vital nutrient can be very helpful for seniors. It can also substantially help their appetite!

9. Dog-Safe Mushrooms such as Shiitake, Turkey Tail, & Reishi for Immune Boosting Support

Mushrooms are an incredibly exciting area of emerging nutritional studies. Some clinical trials have shown great promise in extending the lifespan of dogs battling cancer. And while it’s not a miracle, mushrooms like Reishi, Turkey Tail, and Shiitake can undoubtedly boost the immune system of your body. Bernard.

As you are probably aware, many mushrooms can be toxic to dogs, especially those found in your yard. Make sure to use a dog-safe mushroom supplement if you choose to give one to Fido. This particular formula contains 6 different mushrooms, as well as organic chicken bone broth. 

10. Collagen-rich bone Broth, which supports healthy joints and skin in seniors

One of the biggest causes of early death in St. Bernards is reduced mobility. Bone broth is packed with joint-supporting nutrients like glucosamine, chondroitin, and collagen, all of which help keep your older pup mobile longer. In addition, most senior dogs LOVE the flavor, and it will boost the nutrition and taste of their current food.

The product iHeartDogs recommends and sells contains both bone broth and 6 different immune-supporting mushrooms.

Frequently Asked Questions: Best Supplements for a Senior St. Bernard

1. What supplements are most important for a senior St. Bernard?

Senior St. Bernards often benefit from supplements that support joint health, heart function, digestion, and immune strength. Commonly recommended are glucosamine, chondroitin, omega-3 fatty acids, probiotics, and multivitamins.

2. Do senior St. Bernards need joint supplements?

Yes. Because of their large size, St. Bernards are prone to arthritis and hip dysplasia. Joint supplements with glucosamine, chondroitin, and MSM can help reduce inflammation and improve mobility.

3. Are omega-3 fatty acids good for St. Bernards?

Absolutely. Omega-3 fatty acids from fish oil or krill oil help reduce inflammation, support joint flexibility, improve coat health, and promote heart wellness in senior St. Bernards.

4. Should I give my St. Bernard probiotics?

Yes, probiotics aid in digestive health, nutrient absorption, and immune support. They are especially helpful for seniors with sensitive stomachs or digestive issues.

5. Can multivitamins help senior St. Bernards?

Multivitamins provide a broad spectrum of nutrients that may be missing from a diet alone. They support energy levels, immune health, and overall wellness.

6. What supplement helps with hip dysplasia in St. Bernards?

Glucosamine, chondroitin, and MSM are the top choices for hip dysplasia. Adding turmeric or green-lipped mussel extract may provide extra anti-inflammatory support.

7. Are senior St. Bernards prone to heart issues, and what supplements help?

Yes, large breeds like St. Bernards are prone to heart disease. Supplements with taurine, L-carnitine, and omega-3s can help support cardiac health.

8. Can St. Bernards benefit from antioxidant supplements?

Yes. Antioxidants such as vitamin C, vitamin E, and CoQ10 help fight free radicals, reduce cell damage, and slow age-related decline.

9. Should I give my senior St. Bernard digestive enzymes?

Digestive enzymes can help senior dogs absorb nutrients better, especially if they struggle with bloating, gas, or poor digestion.

10. Are CBD supplements safe for senior St. Bernards?

When properly sourced and vet-approved, CBD supplements may help with joint pain, anxiety, and inflammation. Always consult your vet before use.

11. How do I know if my St. Bernard needs supplements?

Watch for signs like joint stiffness, fatigue, digestive issues, or coat dullness. A vet check-up and bloodwork can confirm which supplements are most beneficial.

12. Can supplements replace a healthy diet for senior St. Bernards?

No. Supplements should enhance a balanced diet, not replace it. High-quality dog food plus targeted supplements work best together.

13. Are there risks to giving too many supplements?

Yes. Over-supplementing can lead to imbalances or side effects. Always follow dosage guidelines and consult your veterinarian before combining products.

14. How long does it take for supplements to work in senior dogs?

Most supplements take 4–6 weeks before noticeable improvements appear, especially for joint and mobility support.

15. What’s the best way to give supplements to a senior St. Bernard?

Supplements are usually available as chewables, powders, or oils. Mixing them with meals is the easiest way to ensure your St. Bernard takes them consistently.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. The information on this website is not intended to replace a one-on-one relationship with a qualified healthcare professional.

Related: Top Pet Insurance Plans for St. Bernard

Choosing the Best Supplements for a Senior St. Bernard

As St. Bernard’s nutritional needs change, making the right supplements an essential part of their daily care. From joint support to digestive health and immune-boosting formulas, high-quality supplements can help keep your senior St. Bernard active, comfortable, and happy. Always consult your veterinarian before adding new supplements to ensure they match your dog’s specific health needs. By choosing the best senior dog supplements, you’ll support your St. Bernard’s overall well-being and give them the healthy, happy golden years they deserve.

iHeartDogs is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no extra cost to you.