Best Capsule Dog Antioxidants in 2026

Number 1 veterinarian-recommended dog probiotic brand to support digestive health (Kantar Veterinary Tracker, 2021), making it a great dog supplement

From the makers of the number one probiotic supplement recommended by veterinarians (Kantar Veterinary Tracker, 2020)

Probiotic supplement for the dietary management of puppies and adult dogs with diarrhea

A tasty & body nourishing treat for cats & dogs - With powerful anti itch and allergy support, this natural fish oil additive supplement supports the skin, coat, hips and joints, heart, and immune system.

Powerful Omega Fatty Acids - This premium fish oil liquid formula is loaded with the healthy Omega-3 fatty acid (with epa and dha) to support health and wellness for your canine or feline companion.

Help your pet stay in great shape - The rich Omegas in Salmon Oil are a dog health supply to aid hip, joint, heart, and immune function to keep your four-legged friend feeling lively and active every day, without the fuss.

Urinary Tract Support - Zesty Paws Cranberry Bladder Bites are formulated to promote kidney & bladder health. With 200 mg of cranberry & organic ingredients, these chewables can help pets UT wellness.

Enhanced with Cran-Max Cranberry - Each chew contains 200mg of Cran-Max, a pure Cranberry concentrate formulated with patented Bio-Shield technology - clinically proven to promote bladder & urinary health.

Promotes Kidney & Bladder Health - These chews also contain Organic Marshmallow Root & Astragalus help flush toxin buildups from the kidney & bladder for comfortable urination, & include anti-inflammatory properties.

Calm and soothe anxious or aging pets with Omega-rich cat and dog hemp oil by Billion Pets. Packed with Vitamins C and E as well as other healing nutrients that work synergistically, it promotes joint mobility, shiny coat and relaxation for dogs and cats who fear loud noises or separation from owners.

Highly concentrated formula from 100% organic hemp extract speeds essential fatty acids, flavonoids, antioxidants and trace minerals to ease discomfort. By promoting joint lubrication and swelling reduction, Billion Pets Hemp Oil for cats and dogs can help pets live happy, active lives.

Veterinarian recommended pet hemp oil offers natural cat and dog relaxation. It is ideal for pets that hide or become nauseous or aggressive during travel, commotions or due to illness. Billion Pets Hemp Oil is a safe and effective calming aid for dogs and cats with no impact on personality.

SUPPORTS A HEALTHY IMMUNE SYSTEM: GREENIES Immune Health Supplements are designed to support your adult and senior dog’s healthy immune system

ANTIOXIDANT BLEND OF VITAMIN C & E: An irresistible premium soft chew made with a powerful blend of antioxidants that helps support your dog’s natural defenses.

FORMULATED BY Ph.D. ANIMAL NUTRITIONISTS: A team of Ph.D. Animal Nutritionists developed a supplement your dog will love.

Antioxidant supplement that supports heart function cardiovascular health in senior dogs that are 6 years old or older

Can slow the aging process and the progression of chronic degenerative diseases

Coenzyme Q10 is a compound that is made naturally in the body, used for cell regrowth and to protect cells from damage. As your pet companion gets older, the body produces less and less. Dr. Harvey’s Coenzyme Q10 provides the additional cellular boost for health and wellness in senior pets

Dog Uti Treatment - Taste great, no mess, small and easy to chew bite-sized bacon and beef liver flavored tablets your pet will love, perfect dog urinary tract infection treatment for dogs with sensitive stomach who hate taking pills and pouches; Treat won't harden into clumps like powder, cause bad breath, make your house smell, or spill on your kitchen counters like messy liquids, juice, dried powders, & hard to open capsules; No refrigeration needed

Cranberry Pills for Dogs - No byproducts, no allergies, 100% safe, Made in America, veterinary science approved bladder support for dogs; Works great for allergy-prone dogs; No wheat, corn, animal digest, grains, soy, egg, potato, shrimp, crab, shark, gluten, avocado; Proprietary canine formula; Holistic nutritional vitamin boost for puppies, seniors, little or large breed; Made in small batches in a Gmp organic certified facility; 3rd-party-tested for purity & correct dosage

Bladder Control for Dogs - Help your dog feel great with the ultimate strength chewable cranberries fruit extract supplement with Apple Cider Vinegar Acv concentrate to help prevent bladder infection & kidney infections; Urinary tract for dogs renal formula remedies bladder pain, control inflammation relief, post antibiotics medicine treatment; Supplements dogs diet, aids total immune health; Puppy, adult, spayed, senior pets

Skin, Brain, and Heart Health for Dogs: Our omega 3 for dogs is much more than just salmon oil for dogs. It's a unique combination of 4 smaller fish that creates a pure, potent, omega 3 fish oil blend. Active Chews dog supplements may help relieve skin and dog coat conditions, itchy skin, flaking, and hot spots while supporting the immune system and promoting heart and brain health.

Skin and Coat: A blend of flaxseed, algae and cold-water fish oils plus biotin delivers a mega boost of Omega-3, 6, 9 fatty acids to help support healthy skin and a shiny, pettable coat.

Immune Support: Vitamins C and E work as immune support supplements by supplying powerful antioxidants to help protect against harmful free radicals.

DOG URINARY TRACT CHEWS: These cranberry chews take a holistic approach to your dog's health. This unique formula helps correct the imbalance in a pet’s urinary and immune systems, helps reduce discomfort, and supports the proper health of the bladder wall and urethra.

CRANBERRY POWER: This dog cranberry extract may help to minimize bacterial colonization, which helps make the bladder lining less hospitable to bacteria. This helps prevent infections and the need for antibiotics, and can help prevent your dog from developing a antibiotic resistance.

IMMUNE SYSTEM BOOSTER: Echinacea helps to stimulate the immune system, and Oregon grape root is a natural, plant root derived antibiotic remedy. Marshmallow root provides a soothing, lubricating protective barrier in the bladder against substances which contribute to irritation.

HERE’S THE HEALTHIEST ORGANIC ANTIOXIDANT SUPPLEMENT FOR YOUR PET! RestoraPet's premium organic pet supplement for dogs, cats, horses, rabbits, hamsters, and other mammals is designed to help your pet combat inflammation while increasing energy levels naturally.

YOUR DOG WILL LOOK & FEEL HEALTHIER AFTER JUST A FEW DAYS! Ideal for puppies and senior doggos, our joint supplement for dogs contains 11 antioxidants, which will help reduce joint pain, improve mobility and increase muscle strength. Great also as dog arthritis pain relief. You will see a difference after just a few days.

IMPROVE YOUR DOG OR CAT’S IMMUNE SYSTEM & MOBILITY NATURALLY! with our organic, non-GMO formula, which contains Vitamin E, CoQ10, Vitalitrol, Omega 3 for Dogs with high EPA/DHA, Lutein, Zeaxanthin and Linoleic Acid. This vet-approved multivitamin for pets will improve your kitten’s coat and reduce pain or inflammation.

Natural UTI Treatment - Coco and Luna Urinary Tract Support is a supplement that contains cranberry for dogs which is a natural dog urinary tract infection treatment.

Powerful Formula - Our dog cranberry supplement supports your pet’s bladder and urinary tract health while also providing a rich and natural source of antioxidants and Vitamin C to support normal urine pH.

Kidney Function - We produce our chewable tablets to contain ingredients that are designed to help maintain normal urinary tract and kidney functions and allow for better bladder control for dogs.

Taste great, no mess, small and easy to chew bite-sized bacon and beef liver flavored tablets your pet will love, perfect treats for dogs with sensitive stomach who hate taking pills and pouches; Chews won't harden into clumps like powder, cause bad breath, make your house smell, or spill on your kitchen counters like messy liquids, powders, and hard to open capsules; OK w/ vitamins, Omega 3 fish oil salmon, probiotics, glucosamine, chondroitin, msm; No refrigeration needed

No byproducts, no allergies, Made in America and hypoallergenic; Works great for allergy prone dogs; No wheat, corn, maltodextrin, animal digest, grains, soy, egg, potato, shrimp, crab, shark, gluten, avocado; Proprietary canine custom formulation provides holistic nutritional boost for puppies, seniors, little or large breed; Made fresh with care in small batches in a Gmp organic facility; Ingredients 3rd-party verified for purity & correct dosage

Make your dog look & feel great with the ultimate chewable turmeric curcumin anti-oxidant supplement for strong joints & cartilage, heart, brain, hepatic liver; Natural food pharmaceutical grade anti-inflammatory formula helps with pain, rheumatoid arthritis, hip dysplasia relief, post antibiotics medicine; Supplements dogs diet for total health and wellness, immune support, puppy, adult, senior pets

URINARY TRACT SUPPORT - Our Berry Balance Chews is natural, holistic, and grain-free cranberry relief for cats and dogs, rich with antioxidants, and is specially formulated for your friend's urinary tract health, kidney and bladder wellness

KIDNEY + BLADDER RELIEF - Cranberry and blueberry are rich with antioxidants and vitamin C that can help support kidney and bladder health while promoting urinary tract function

AMERICA'S FIRST HOLISTIC PET FOOD: Solid Gold has been delivering transformative nutrition for your pet since 1974, crafting recipes with functional superfoods, omega fatty acids, high quality proteins, and protected probiotics to support gut health and overall well being

MAX Concentration for MAX Urinary Tract Support - 400mg of cranberry seed oil + 350mg of d-mannose, 350mg of grapefruit seed extract, and 7M CFU of probiotic blend per chew. Dog cranberry supplement helps to support your dog urinary tract.

Vet Formulated and Complete Urinary Tract (UT), Kidney & Bladder Supplement - Healthy Urinary tract = Happy Pets & Happy Pet Parents. MAX Cranberry chews are vet formulated to promote optimal urinary tract health and dog bladder support.

MAX Cranberry chews for dogs help maintain normal urine pH - our advanced formula rich in pure cranberry seed oil, d-mannose, grapefruit seed extract promotes normal detoxification of the urinary tract (UT). Imbalance of urine pH may lead to UTI's.

Real Alaskan Salmon Oil - Helps Maintain Healthy Skin + Glossy Coat - These natural salmon flavored salmon oil supplement snacks are made using sustainably sourced Wild Alaskan Salmon, Kelp, Vitamin E and DHA. Each chew contains more Omega-3 and Omega-6 fatty acids than most other salmon supplements and will help maintain moisture in the skin, support skin health, a glossy coat and may help reduce unseasonal or excessive shedding.

Gentle, Natural + Made In The U.S.A. - At PetHonesty we're committed to premium quality ingredients and strict safety standards. Our dog chews are made in the USA with only the highest-quality US and globally sourced ingredients derived from natural sources like salmon oil and kelp and contain NO harsh preservatives, corn, soy, GMOs or chemical ingredients.

Soft Chews That Dogs Actually Want! - Our salmon dog supplements come in the form of a delicious soft chew flavored with natural salmon that your dog will LOVE. No more hiding liquids, pills, tablets or powders in your dog's food! Our delicious supplement chews provide a bonding experience for you and your dog. 9 out of 10 dogs gobbled these up in a blind taste test.

Vet-Recommended for Healthy Skin, Coat, and Allergy-Related Skin Issues: PetHonesty's Omega SkinHealth chews are vet-recommended to promote skin and coat health, support a healthy immune response and help soothe skin-related issues associated with seasonal allergies and dry climates.

Supports A Healthy Immune System + Joints: These tasty chews are a natural source of Omega-3s from a variety of diverse sources to ensure optimal absorption and efficacy for your dog. Omegas will help support a healthy immune and inflammatory response in your dog's body as well as keep joints and heart healthy.

Made with Natural Ingredients Like Krill, Salmon Oil, Chia Seeds, Biotin + Spirulina: Powerful all-natural ingredients like Kelp, Vitamin E, Salmon Oil, Algae and more are filled with antioxidants, vitamins and healthy Omega-3's and Omega-6's that contribute to healthy skin and a shiny coat.

DOG IMMUNE SUPPORT: Fuel your pet with the support he needs to stay healthy and support his immune system.

PET HEALTH SUPPLEMENT: Give your furry friend the immune support he needs with these health supplements for dogs and cats that include some natural ingredients such as maitake mushrooms, shiitake mushrooms, turkey tail mushrooms and reishi mushrooms.

PET IMMUNE SUPPORT FORMULA: A healthy immune system is essential for dogs and cats. Ensure your furry friend remains active and healthy with these pet health supplements that support normal inflammatory response while supporting T-helper cell activity.

Cranimals is a whole food antioxidant supplement for your dog or Cat

Cranimals is made from cranberries, Red raspberries and Blueberries and contain many potent antioxidants

Cranimals is a simple way to add Nature's goodness to your pet's kibble or wet food

Developed & tested by the makers of vet-recommended Advantage flea & tick protection

NUTRITIONAL SUPPLEMENT FOR HEALTHY AGING AND JOINT SUPPORT: A unique daily supplement that promotes joint health and helps maintain comfort throughout the body as dogs age

MULTIPLE BENEFITS: Alenza provides more than just joint support, it supports multiple systems throughout the body, including a normal inflammatory response in dogs for whole body comfort

Wild Krill from the Pristine Waters of Antarctica Contain High Levels of the Natural Antioxidant, Astaxanthin, which Gives Krill its Deep, Red Color.

Antioxidants have been Shown to Aid in the Elimination of Harmful Molecules Called “Free Radicals.”

Grizzly’s Krill Oil Contains up to EIGHT Times More Astaxanthin than Krill Oil for Humans, Making it an Extremely Powerful Antioxidant for Dogs and Cats.

Cell Advance products are superior antioxidant formulas for dogs and cats

Provides 23 powerful antioxidants/free radical scavengers at levels that are designed to work with any program the animal may be on

Cell Advance capsules contain specific ingredients that have been enteric-coated

HIGH-QUALITY ALLERGY SUPPLEMENT FOR DOGS, CATS: Help your furry friend weather the changes in season with this NaturVet Aller-011 Advanced Allergy Aid for Dogs and Cats. This pet supplement is rich in antioxidants, omegas, DHA and EPA to help boost your pet’s immune system.

VITAMIN-ENHANCED PET SUPPLEMENTS FOR ALLERGIES: Ensure that your canine companion receives the nutrients he needs with these dog allergy supplements and cat allergy supplements that are cGMP compliant and made in the USA.

DOG, CAT SUPPLEMENTS FOR IMMUNE SYSTEM SUPPORT: Available in soft chews, tablets and powder form, these dog and cat supplements for allergies are veterinarian formulated and designed to help combat environmental pollutants while supporting your pet’s immune system, skin moisture and respiratory health.

CARDIOVASCULAR SUPPORT DOG SUPPLEMENT – Improve your dog's overall health and wellness with GNC Pets ADVANCED Cardio Soft Chews, made with botanicals, antioxidants, and amino acids

EASY TO CHEW DOG SUPPLEMENT – If your dog has an aversion to swallowing pills, these easy to chew soft chews are the way to go! They make getting the nutrients your dog needs easier than ever

DELICIOUS CHICKEN FLAVOR DOGS LOVE – GNC Pets ADVANCED Dog Cardio Soft Chews for Dogs satisfy their taste buds while improving their insides

Effective Formula: This anti nausea medication was specifically designed for your dog’s needs. It helps relieve motion sickness and carsickness for any type of travel or trip, long or short.

Easily Digested: Our anti-nausea formula is a great non-sedative solution that's gentle on your furry best friend's belly.

Easy to Swallow: Small and odor free, our motion sickness pills work quickly to calm stomach upset. Give to your pup 30 minutes before traveling to help soothe the belly and car sickness and stop disorientation. Works up to 6-8 hours on most dogs.

✅ BETTER QUALITY OF LIFE. Are you concerned about your pet's quality of life? Outward signs of discomfort, anxiety, and stress can have a devastating impact on our pet family. We're here to help.

✅ IMMUNE. Vet-strength herbal formula for dogs and cats supports your pet's immune system and overall health and vitality. It really is GOLD when your pet’s quality of life has been compromised.

✅ PROTECTION. Antioxidants help protect your pet from oxidative stress due to free-radical damage. Ongoing damage to healthy cells can impair immune function and make your dog or cat more vulnerable to cancer. Life Gold herbal ingredients help provide antioxidant support and protection.

REAL WILD ALASKAN SALMON OIL - Helps Maintain Healthy Skin + Glossy Coat - These natural salmon flavored salmon oil supplement snacks are made using sustainably sourced Wild Alaskan Salmon, Kelp, Vitamin E and DHA. Each chew contains more Omega-3 and Omega-6 fatty acids than most other salmon supplements and will help maintain moisture in the skin, support skin health, a glossy coat and may help reduce unseasonal or excessive shedding.

GENTLE, NATURAL + MADE IN THE U.S.A. - At Strawfield Pets we're committed to premium quality ingredients and strict safety standards. Our dog chews are made in the USA with only the highest-quality US and globally sourced ingredients derived from natural sources like salmon oil and kelp and contain NO harsh preservatives, corn, soy, GMOs or chemical ingredients.

SOFT CHEWS THAT DOGS LOVE! - Our salmon dog supplements come in the form of a delicious soft chew flavored with natural salmon that your dog will LOVE. No more hiding liquids, pills, tablets or powders in your dog's food! Our delicious supplement chews provide a bonding experience for you and your dog.

A healthy gut means a healthy dog - Probiotics inhibit the growth of harmful gut bacteria and prebiotics stimulate the growth of such much needed gut flora.

Strengthens immune system and encourages longevity - Promote the production of natural antibodies, fight free radicals, and support a healthy immune system in your dog.

Superior ingredients for effectiveness - Your dog will thank you for improvements in their mood, healthier looking fur & skin, decreased occurrences of urinary tract infections, reduction in allergies and itching, gas relief and a reduction in bad breath.

🐶 FOR A BEAUTIFUL GLOSSY COAT – Our shed Free Krill Oil Soft Chews for Pets offer wonderful benefits for your furry friends. Besides providing a beautiful and lustrous coat for our dogs, the fatty acids of krill oil is known to improve the health of their skin and coat.

🐶 NO MORE SHEDDING & ITCHING - Our formula is designed to help reduce inflammation, itchy skin, shedding and encourage new cellular growth. This formula works perfectly in combination with our Joint Formula to help reduce joint pain.

🐶 ONLY THE BEST FOR YOUR DOG - Pet Vitamin Co only sources the best quality for your furry friends. Our Shed Free Krill Oil Soft Chews for Pets are Richer in Omega 3 Fatty Acids than Fish Oil. Krill oil offers all the best antioxidants not found in fish or cod liver oil.

🐶 PROBIOTICS ENZYME BLEND - Our Digestive Chews have been developed by a team of pet supplement specialists to meet the specific nutritional needs of your dog. Our chews are the ideal supplement for your dog’s digestive health, while also providing nutrients vital to keep your pup’s immune system in tip-top shape.

🐶 DIGESTIVE SUPPORT - With our Digestive Chews, you can help maintain a healthy digestive system for your pup. This will help you ensure that they live a happy, healthy, and active lifestyle.

🐶 BLUEBERRY & PUMPKIN POWDER- Blueberries and pumpkin are rich in antioxidants, vitamins, and minerals that your dog needs to thrive. These ingredients rid your pup of toxins and boost gut function. Improved digestive health means improved overall health.

Highly rated immune support for dogs: 365 day guarantee; if you are not happy with our immune support for dogs plus antioxidant, simply contact us for a full refund; we want you to be completely satisfied with our premium tablets, which help to strengthen your dog's immune system to make it easier to fight off pathogens and toxins; manufactured using the highest standards, our supplement can be taken with your dog's food or separately

Help reduce inflammation: Nutrition Strength's immune support for dogs plus antioxidant contains a blend of reishi, maitake, turkey tail and shiitake mushrooms; their bioactive compounds, including polysaccharides, proteoglycans, terpenoids, phenolic compounds, steroids and lectins, have a wide range of therapeutic effects and can act as immune modulatory, antioxidant and anti inflammatory agents

Stimulate cell activity: our supplement's mushroom ingredients have been shown to stimulate the activity of T helper cells, which play an important role in the immune system, especially in the adaptive immune system, by helping to suppress or regulate immune responses; by giving a boost to your dog's immune system, you may help prevent and ease future health challenges for your pet and help your dog feel their optimal selves