Best Capsule Dog Antioxidants in 2026

Rich Omega-3 Support – Zesty Paws Omega Bites are delicious chewable supplement treats with Omega fatty acids (with EPA and DHA), vitamins, and nutrients to help dogs look and feel their best.

Features AlaskOmega – Derived from Wild Alaskan Pollock, this premium ingredient provides a clean and pure source of omegas (with EPA and DHA) to boost your pup's wellness.

Healthy Skin = Happy Dog! – This formula contains Fish Oil, Biotin, Vitamin C and E. These vitamins, omegas, and antioxidants may help with dry, sensitive skin.

Rich Omega-3 Support – Zesty Paws Omega Bites are delicious chewable supplement treats with Omega fatty acids (with EPA and DHA), vitamins, and nutrients to help dogs look and feel their best.

Features AlaskOmega – Derived from Wild Alaskan Pollock, this premium ingredient provides a clean and pure source of omegas (with EPA and DHA) to boost your pup's wellness.

Healthy Skin = Happy Dog! – This formula contains Fish Oil, Biotin, Vitamin C and E. These vitamins, omegas, and antioxidants may help with hot spots and dry, itching, irritated, sensitive, and flaky skin.

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.

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.

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.

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. You will see a difference after just a few days.

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

Daily Eye Care Soft Chews - Zesty Paws Senior Vision Bites are grain free chewable supplements with vitamins, antioxidants, and Omega-3 to promote eye health for senior dogs of any breed or size.

Advanced Lutein for Canine Seniors - This formula features Lutemax 2020, a marigold extract comprised of Lutein and Zeaxanthin to help senior dogs with eye strain and carotenoid levels.

Omega-3 Fatty Acid for Eyes - Senior Vision Bites also feature Cod Liver Oil and DHAgold, an algae derived source of Omega 3 DHA to support overall eye function to help eye function for older dogs.

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.

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.

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.

✅ 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 SUPPORT. Vet-strength Immune SURE herbal formulation supports your dog's natural immune defenses and innate resistance to keep them healthy and strong. Promotes your pet's optimal immune response.

✅ ANTIOXIDANT PROTECTION. Ongoing cellular damage from free-radicals can impair immune function and make your dog more vulnerable to chronic conditions or cancer. Antioxidants in Immune Sure, including vitamin C, help protect your pet from oxidative stress due to free-radical damage.

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. You will see a difference after just a few days.

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

DOG MULTIVITAMIN AND OMEGA BUNDLE: As they age, it is essential for dogs to get the right vitamins to support their growth. Our dog joint supplement bundle of Daily Adult Essential Multivitamins (60 count) + Omega Max w/ Turmeric (60 count) is pawfect to do just that. Use our dog vitamins and supplements to help protect and support your dog with ensuring they get essential vitamins as they age and a healthy-looking coat to match.

DAILY ESSENTIALS MULTIVITAMIN FOR DOGS: Our advanced formula contains essential vitamins and minerals for your dog’s long-term health, including Calcium, Phosphorus, Potassium, Magnesium, Iron, Vitamin A, Vitamin C, Vitamin D, Vitamin E, Vitamin B and more . And with a rich boost of antioxidants, it helps fortify the overall immune health too.

OMEGA MAX w/ TURMERIC: These dog turmeric chews are formulated by veterinarians to promote healthy skin and coat, and provide important support for heart, brain and hepatic liver health. Our dog turmeric soft chews are formulated with Omega-3, Omega -6, Omega-9, turmeric Curcumin and Vitamin E.

ADVANCED IMMUNE SUPPORT FOR CATS: Fuel your pet with the nutrients she needs to stay healthy and boost her immune system with cat health supplements that feature antioxidants and much-needed nutrients and amino acids to stay active.

HELP STRENGTHEN CAT IMMUNITY: Give your furry friend the immune boost she needs with these health supplements for cats that are infused with veterinarian-approved ingredients such as amino acids and L-Lysine.

PET EYE HEALTH SUPPLEMENT: A healthy immune system and eye health is essential for cats of any age. Ensure your furry friend remains active with healthy vision with these pet health supplements that help support normal inflammatory response and cat eye health.

Formula: Omega-Caps are specially formulated with a comprehensive blend of essential fatty acids, vitamins, chelated minerals, and antioxidants to help support the immune system of your dog. The active ingredients in Omega-Caps also help maintain joints, heart health, and normal brain function.

Additional Benefits: Formulated with Omega-3 fatty acids, EPA and DHA, which are essential to the healthy functioning of your pet's body, especially the brain and nervous system. They also play a key role in vascular health by supporting normal function of the cardiac muscle and promoting normal circulation. These fatty acids cannot be produced by your pet's body and so must be obtained through secondary sources like Omega-Caps.

Vitamins: Vitamins in Omega-Caps provide a variety of health support. Vitamin A plays an important role in the growth of all bodily tissues, including skin and hair. Vitamin D is important for normal growth and development of bones and teeth. The antioxidant, Vitamin E, assists your dog's body in combating environmental pollutants by helping the body remove damaging free radicals.

All-In-One Dog Supplement - Multivitamins are important to maintain balanced health. Like humans, dogs or cats also need a complete and balanced diet to meet their nutritional needs. This ultimate pet nutrition powder for older dogs and cats can help keep your four-legged family members healthy and protected from various health problems

Aging Support for Older Pets - As dogs or cats age, their bodies start to deteriorate. Our dog vitamin & mineral powder packs a big nutritional punch to deliver antioxidant support to your senior pets. This nutritional supplement helps improve their bone health, boost their energy and optimizes their mental function

Comprehensive Antioxidant for Senior Cats and Dogs – Our experts ensure that this dog nutritional supplement provides complete wellness support to your beloved pet. This supplement combines Ginkgo Biloba Extract, Reishi Mushroom Extract, Beef Liver Hydrolysate, Chromium Picolinate, Calcium Citrate, Selenium, and Vitamin D3 to help improve your pet's bone, brain, and liver health. It’s a strong antioxidant that helps reduce free-radical activity in your pet’s body

An Advanced Anxiety Formula for Dogs – Zesty Paws Calming Bites are turkey flavored chewable supplements with natural and organic ingredients that help dogs with nervous, anxious, or aggressive behaviors feel calm and comfortable.

Features Suntheanine – These calming dog chewables contain 30mg of Suntheanine per chew, which is a pure and GRAS-designated form of L-Theanine that helps stimulate brain waves to promote relaxation with no drowsy effect.

Rich Omega-3 Support – Zesty Paws Omega Bites are delicious chewable supplement treats with Omega fatty acids (with EPA and DHA), vitamins, and nutrients to help dogs look and feel their best.

🐕 NO MORE TUMMY & GAS ISSUES - Support your pup’s gut health with these soft chews full of dog probiotics and digestive enzymes. Doctor Doggo's dog probiotic supplement aids in nutrient absorption, overall digestive health, and immune support.

🦴 GOOD BACTERIA MEANS A HEALHY GUT - With a 6-strain probiotic blend and a 7 digestive enzymes for dogs blend that includes amylase, lypase, cellulase, papain, and bromelain, Doctor Doggo’s Digestive Chews supports proper bowel function and gut flora.

🐕 NUTRIENT & ANTIOXIDANT RICH - Fight free radicals and improve nutrition with powerful antioxidants found in pumpkin and apple pomace. These vitamin rich ingredients reinforce your dog’s immune system and bowel health through vitamins and minerals.

TriMega OMEGA 3 6 9 COMPLEX - Healthy dog treats sourced from Safflower Oil, Salmon Oil, and Fish Oil to support holistic body functioning — including cognition, mobility, immune system and more.

REAL WILD ALASKAN FISH OIL - Dermabliss Omega & Skin Soft Chews are specially formulated with Omega 3 for dogs to help maintain healthy skin and overall health, with supportive ingredients like Biotin, Zinc, and Antioxidants to provide a comprehensive daily dog supplement.

SUPPORTS HEALTHY ANAL GLANDS - Glandex dog supplements were created by veterinarians specifically to help support healthy anal gland function in dogs. With a patented and unique Fiber Blend including Pumpkin Seed, these soft chew treats support bulky and firm stools and assist in the natural emptying of anal glands.

Reishi Mushroom Capsules for Longevity & Relaxation: Made only from 100% real mushrooms, the Reishi Mushroom supplement is the ultimate natural dietary supplement that can provide your body with better sleep and relaxation. Studies show that Reishi may help fight fatigue due to the occasional stress from work while helping to support normal immune function.

Cordyceps Capsules for Energy & Vitality: Made using hand-picked and 100% cordyceps militaris mushroom extract, the Cordyceps-M from Real Mushrooms is a potent dietary supplement formulated to provide you with energy, vitality, and immune support. Taking two (2) vegan capsules a day is equivalent to consuming 10 grams of fresh mushrooms - giving you a sufficient dose of beneficial beta-glucans, triterpenes, and other nutrients.

Organic Mushrooms for Dogs & Cats: Be a supportive fur parent and pull all the stops when it comes to your buddy's well-being. These calming bites for dogs contain Reishi extracts rich in antioxidants for liver and cardiovascular health as well as Lion's Mane extract for stimulating nerve growth, digestive health, and neurological functions support. 60 servings of calming chews for cats and calming dog chews.

BENEFITS OF DIGESTIVE ENZYMES: This formula helps your dog digest food, which unlocks vitamins, minerals, and other important nutrients so they can be absorbed and utilized in the body. Can also help with upset stomach and diarrhea. PREVENT NUTRIENT DEFICIENCY: If your pet doesn't digest the nutrients it needs, it can result in incomplete food digestion, allowing partially digested food particles to enter the bloodstream from the large intestine, This can cause health concerns in your pet.

DOG PROBIOTICS FOR HEALTHY GUT: 90 Million CFU live probiotic spores supplement depleted bacteria and are vital in maintain proper health. Gut micro flora is involved in resistance to disease. This digestive supplement includes protease, which hydrolyzes protein; amylase, which hydrolyzes carbohydrates; lipase, which hydrolyzes fats; cellulase, which breaks down cellulose such as corn and wheat; and ginger, which aids in digestion.

DOG URINARY TRACT CHEWS: Take an holistic approach to your dog's health with cranberry pills that help correct urinary and immune system imbalances. It helps reduce discomfort, and supports bladder wall and urethra health. 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 developing an antibiotic resistance.

Cordyceps Capsules for Energy & Vitality: Made using hand-picked and 100% cordyceps militaris mushroom extract, the Cordyceps-M from Real Mushrooms is a potent dietary supplement formulated to provide you with energy, vitality, and immune support. Taking two (2) vegan capsules a day is equivalent to consuming 10 grams of fresh mushrooms - giving you a sufficient dose of beneficial beta-glucans, triterpenes, and other nutrients.

Made Only From Hot Water Extracted Cordyceps Militaris Mushrooms: Real Mushrooms Cordyceps supplement is made using the fruiting bodies of the Cordyceps militaris, not Cordyceps sinensis. Unlike other mushroom supplements, we don’t use mycelium, grains, additives, or fillers. Hot water extraction breaks down the tough cell wall of these mushrooms, allowing for improved bioavailability of the important beneficial compounds.

Essential Mushroom Supplement for Pets: Don't let anything get in the way of you enjoying more time with your best buds. Our Pet Immune Chews are specially formulated with Real Mushrooms 5 Defenders making for the perfect dog health supplement in the form of tasty treats. Made from 100% real organic Chaga, Maitake, Shiitake, Reishi & Turkey Tail mushrooms, every pet chew gives the energy, vitality, and immune system support your dog or cat needs

Lions Mane Mushroom for Digestive Health Support: Made only from 100% organic mushrooms, the Lions Mane supplement is the ultimate natural dietary supplement that can provide your body with the necessary antioxidants and nutrients to support immune health and normal cognitive function such as clarity and focus.

100% Pure Lions Mane Extract: Unlike most other mushroom supplement brands in the market that use mycelium (mushroom root system grown on grain), our lions mane extract powder is made from 100% real mushroom, handpicked by experts with over 40 years of mushroom growing experience. This ensures that all our lions mane supplements contain no fillers, no grains, and no additives.

Essential Mushroom Supplement for Pets: Don't let anything get in the way of you enjoying more time with your best buds. Our Pet Immune Chews is specially formulated with Real Mushrooms 5 Defenders making for the perfect dog health supplement in the form of tasty treats. Made from 100% real organic Chaga, Maitake, Shiitake, Reishi & Turkey Tail mushrooms, every pet chew gives the energy, vitality, and immune system support your dog or cat needs.

Our antioxidant nutritional supplements provide enzyme enriched food sources, powerful antioxidant protection, and beta carotene to create a powerful and effective antioxidant supplement.

Live Sprouted Soy provides the perfect precursor glutathione supplement. Nzymes Antioxidant Complex provides super-oxide dismutase, catalase, glutathione peroxidase, and methionine reductase.

Contains just the right amount of selenium supplement from a bio-available source of nutritional yeast. Selenium is one of the key components that your body uses to self-destruct poorly copied DNA.