Best Cat Antioxidant Supplements of 2025

"This is a top-rated company for animal health products. My veterinarian, a leading small animal specialist, recommended this for my house rabbits and guinea pigs over 15 years ago. Their health has improved, and their lifespans have lengthened. Always consult your vet first regarding dosages and possible medication conflicts. If your vet suggests DMG, this is the company to choose. I also recommend the bigger bottle for better value!"

"I have a 11-year-old calico cat prone to dry skin, leading to excessive itching and raw spots. I tried various treatments, but nothing worked until I found Vetriscience drops. After using them for about two weeks, I noticed at least a 50% improvement in her skin condition! I highly recommend this product for anyone dealing with skin irritations or allergies in their cats."

"My cat suffers from feline herpes, and despite being on lysine, he continued sneezing. I decided to try DMG as an additional amino acid, and within a week, his sneezing subsided! It’s been a game changer. We went from frequent sneezing and poor appetite to needing antibiotics only once a year. I would absolutely recommend this for anyone with a cat suffering from FHV/FVR."

"I got this for my cat who had gunky eyes. After following the dosing instructions, he hasn't had issues since. He enjoys it daily, and it's been almost a year!"

"My cat with FHV actually eats these treats! I've tried many products, but this is the first one that works for her. I'm so grateful and will be ordering regularly!"

"I have a 10-year-old cat with chronic respiratory problems. These treats have helped him, especially after two weeks. Less drainage from his eyes and sneezing has decreased. I plan to keep giving them to him."

"I’ve been giving this natural immune booster to my elderly cats with various health issues. They now have more energy and I’ve noticed significant health improvements. The directions are easy to follow and the dropper works well!"

"When my beloved 19-year-old cat Mimi was diagnosed with cancer, I wish I had found this product sooner! After starting Life Gold, she went from being lethargic to active and playful again, which was truly a miracle. I highly recommend it for any cat facing serious health issues!"

"I purchased this for my cat who was diagnosed with a tumor. I struggled to administer it due to her fussiness, but I found a creative solution by mixing it with hairball gel. It's been effective as the vet noted that the tumor is no longer palpable. Life Gold is helping Shadow!"

"I purchased these for my cat with upper respiratory problems, and within just three days, her symptoms greatly improved. Her eyes are no longer runny, and she's stopped sneezing. I can't comment on the taste, but her excited reaction suggests they must taste great. She even reminds me when it's treat time!"

"Unfortunately, my cat refused to eat these treats. I tried cutting them up and mixing them into her food, but she ended up throwing up for three days. To make matters worse, they're non-returnable. I'm quite disappointed."

"I used to buy these regularly for my cat with recurring respiratory issues, but this time she wouldn't touch them. They seem to have gotten less fresh over time. After this experience, I won't be purchasing them again and will look for a different brand."

"I had a 9-year-old cat diagnosed with liver and renal failure. After trying Milk Thistle, he showed good signs of wellness within a week. His liver issues resolved, and I’m continuing with vitamins for his chronic condition. This is a 100% authentic review—I’m here to help others in similar situations."

"Motor, one of my rescue cats, was suffering from liver failure and was very sick. A vet suggested Milk Thistle, which he has taken daily for two years. This product has truly been a lifesaver for him despite the bitterness he doesn't like!"

"My cat, Oscar, had high liver enzymes due to hyperthyroidism. After starting Milk Thistle drops, his liver enzymes returned to normal levels in just six weeks. The vet was thrilled with the results, and I highly recommend this herbal remedy!"

"I have a FIV positive cat and recently bought this to help boost his immune system. He loves the taste, and I sprinkle it over his hard food or mix it in. The only drawback is the tiny scoop inside the pack, which can make a mess."

"I thought I'd try this vitamin supplement for my 10-year-old cat. It works great! He's more energetic and his fur is much softer now. I believe it's a really good product and not expensive at all."

"I was thrilled to find this for my FIV+ cat, but unfortunately, he wouldn't touch it, even when mixed with his favorite food. My other cat ended up vomiting after eating it. I'm really disappointed and feel like they don't stand behind their product!"

"I appreciate that it doesn't need refrigeration - so convenient! After a month of use, Adele's BUN and Creatinine levels have improved by 2 decimal points!"

"Initially, I was disappointed with the syringe because it doesn't measure accurately below 5cc. However, the capsules work perfectly for my Lab, and I can easily sprinkle them on her food."

"After switching from a more expensive product, I noticed my dog started drinking excessively again. I realized that this product isn't shipped on ice, and I should have trusted the former brand. I won't waste my money again."

"I started using this product after my vet suggested it for my West Highland White Terrier, who has chronic urinary tract infections. This really works! No more infections and it saves me from costly vet visits."

"I give my cat this cranberry supplement because my vet recommended it to prevent urinary problems. It’s great! I simply sprinkle it on her food and she loves it, especially when I add nutritional yeast."

"I’ve been giving this to my 13-year-old golden retriever, and I’ve seen such amazing improvements in his health. He now reminds me for his 'special treat' every evening, and it truly helps him in his golden years."

"My 13-year-old cat had a low appetite after being ill this summer, but this product really brought her back to normal. The bottle was small but worth it; nothing worked like this to get her going again."

"I was worried about my cat that had stopped eating and was hiding all the time. After using this product, her appetite returned before the bottle was even finished! I’m so grateful for this product!"

"I had almost forgotten I bought this for my elderly cat who was going downhill fast. It helped her feel more comfortable and satisfied, and I would buy it again in a heartbeat. It’s a good choice for this purpose!"