Rx Vitamins Bio-C – Vitamin C for Dogs and Cats – with Lemon Bioflavonoids for Allergy Relief – Immune Support Supplement – Promotes Healthy Coat and Skin – Joint Supplement – 4 oz
Original price was: $21.49.$18.00Current price is: $18.00.






Price: $21.49 - $18.00
(as of Oct 28, 2025 18:55:16 UTC – Details)
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Nutritional Formulations
Rx Vitamins for Pets provides veterinarians with nutritional formulations designed to enhance patient outcomes. Since 1998, Rx Vitamins has set the standard in the development of safe, well-researched formulas. We support veterinarians by providing a wide choice of treatment options to complement the conventional care of companion animals.
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Liver Support
Product Dimensions : 2.1 x 3.7 x 2.1 inches; 5.11 ounces
Item model number : 8007TL
Date First Available : May 1, 2024
Manufacturer : Rx Vitamins
ASIN : B0CX6XTCDP
Best Sellers Rank: #26,695 in Pet Supplies (See Top 100 in Pet Supplies) #140 in Cat Supplements & Vitamins #650 in Dog Supplements & Vitamins
Customer Reviews: 4.5 4.5 out of 5 stars 401 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Immune System Support: Rx Vitamins Bio-C Vitamin C supplement for dogs and cats is formulated to enhance your pet’s immune system, offering a natural immunity boost with vital nutrients for their well-being.
Antioxidant Boost: Our vitamin C with bioflavonoids offers potent antioxidant protection, combining the best of nature’s bounty to boost your pets’ well-being. This supplement is an excellent addition to your cat and dog vitamins and supplements, promoting an active lifestyle.
Healthy Skin and Coat: Promotes an improved skin and healthy coat for dogs and cats using vitamin C in the form of sodium ascorbate, providing essential nourishment for vibrant and healthy pets.
Easy Administration: The convenient vitamin C powder ensures easy dosing—simply sprinkle it over meals for effortless intake making it the ideal cat vitamins of all ages, including senior dog supplements.
Vet-Formulated: Developed by veterinarians, this Vitamin C 500mg supplement is designed to offer comprehensive immune defense for your pet, ensuring optimal health and vitality.
Customers say
Customers find the vitamin C supplement effective for immune support, particularly noting its benefits for ear infections and urine pH levels. The product receives positive feedback for its quality, taste, and ease of use, with one customer specifically mentioning it’s easy to administer to both cats and dogs. While some customers consider it a great value, others find it a waste of money, and there are mixed experiences with diarrhea, with some reporting normal stools while others had severe issues. The product has an odd smell that customers find negative.
8 reviews for Rx Vitamins Bio-C – Vitamin C for Dogs and Cats – with Lemon Bioflavonoids for Allergy Relief – Immune Support Supplement – Promotes Healthy Coat and Skin – Joint Supplement – 4 oz
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Original price was: $21.49.$18.00Current price is: $18.00.


Onahunch –
A Fantastic Boost for My Pets’ Health—They’re Thriving!
I’ve been using Rx Vitamins Bio-C (4 oz) for my dog and cat, and I’m absolutely thrilled with the results! This vitamin C supplement, packed with lemon bioflavonoids, has been a superstar for immune support, allergy relief, and even joint health. It’s done wonders for their coats and skin too—my pets are looking and feeling their best, and I’m giving this a glowing five-star review!It’s so easy to use—just a quick sprinkle of this powder into their food, and they eat it right up without a fuss. My 12-year-old tabby cat was struggling with seasonal allergies—sneezing and itchy skin—but after a couple of weeks on Bio-C, her symptoms have calmed down, and her coat is softer than ever. My 8-year-old shepherd mix, who’s always been a little stiff in the mornings, seems more limber and playful now, which I chalk up to the joint support from the vitamin C. The added bioflavonoids are a bonus—they boost the antioxidant power and really seem to help with inflammation.The 4 oz bottle is a great size—lasts about two months for my duo with daily use—and I love that it’s vet-formulated and safe for both dogs and cats. It’s tasteless and odorless, so even my picky cat doesn’t bat an eye. I’ve noticed their energy levels are up too, and they just seem healthier overall. It’s such a relief to have a natural supplement that supports their immune systems and keeps them comfortable year-round!Pros:• Noticeable allergy relief and shinier coats in weeks• Easy to mix into food—no taste or smell to scare off picky pets• Boosts immunity and joint health for dogs and cats alike• Lemon bioflavonoids add extra antioxidant power• Long-lasting 4 oz bottle—great value for multi-pet homesCons:• Takes a little time (2-3 weeks) to see full effects—worth the wait though!• Powder can clump if not stored super dry (just shake it up)Rx Vitamins Bio-C is a five-star gem for pet parents! It’s an incredible all-in-one supplement that’s improved my dog and cat’s skin, joints, and overall wellness. If you’re looking for a safe, effective way to support your pets’ health, this is it—I can’t recommend it highly enough!
CAM –
Vet recommended
Recommended by my vet for immunity. I put it in my dog’s food and she has no problem eating it. I’ve been using it since the horrible dog virus. My dog fortunately never got sick with the fatal virus. I’ve continued using it.
P. Thomas –
Your Dog Needs Vitamin C Now!
This review is for Rx Vitamins for PETS’ BIO-C, Vitamin C supplement for dogs.I decided to give my dog Vitamin C because her low protein illiness seemed to me to be a vitamin deficiency and Vitamin C and bioflavonoids are the only vitamins not in dog food or supplements. In February 2019 during a wellness visit I asked for routine blood work because my dog’s urine smelled so strong. Also she had soft stools. I don’t know why I didn’t ask for a urinalysis but I asked for a blood test.The Vet called me with the test results and there was nothing wrong with my dog’s kidneys or bladder. But shockingly, my dog was starving in plain sight. Malabsorption. Her tests showed low albumin, low protein. More testing and the low protein was worse. No treatment yet. I told the Vet that I wanted to rule-out the dreaded lymphangiectasia. More testing and PLE protein losing enteropathy was confirmed. But no treatment yet. I did “research” on the Internet. The only hopeful treatment was from a Wisconsin vet who recommended egg white protein. So I gave my dog hardboiled egg white. It passed thru undigested causing heartburn with belching and horrible bad breath. So then I fed my dog lightly poached egg whites.The protein levels went up 20%. But then my dog had the worse diarrhea she had ever had. And my dog had had a lot of diarrhea mostly soft stools, sometimes worse, ever since she was a puppy. Back then her Vet prescribed low dose compounded Metronidazole pills and even told me give her a pill instead of coming into the office. That is a standard treatment for diarrhea. The diarrhea always went away after 2-3 days. This vet also diagnosed my dog with stress diarrhea and gave my dog FortiFlora. We moved to a new town and the new Vet was not too keen on routine Rxs for diarrhea. I had to beg for medication for my dog. My requests were refused. My dog suffered soft stools and worse for months. For months I had to get up in the middle of the night and clean diarrhea off the carpet. By this time the diarrhea smelled atrocious, the worse odor ever. Meanwhile no treatment for low protein.So I decided to go to a Veterinarian Internal Medicine Specialist, a Vet IMS. But before I went to the 1st appointment, I started wondering if my Coton De Tulear was suffering from a vitamin deficiency. She had a few lesions that looked like bleeding under the skin. Could this be a form of scurvy? But mostly I decided upon Vit C because I never believed that dogs don’t need supplement for it. Apparently while dogs can make their own Vit C, they do not make bioflavonoids. So I ordered Rx Vitamins for PETS’ BIO-C. When I received it I added 1/4 of the standard dose to wet dog food. My dog turned up her nose. So I put it inside a treat. The scoop handle is too long for the bottle, I had to cut it off.Also I have a small white dog, very stressed, barking all the time. The organs in the body that enable animals to deal with stress are the adrenal glands. Most of the human body’s Vitamin C is in the adrenal glands. I got that bit of information from a blogger who writes about adrenals and the adrenal steroids. I jumped to the conclusion that’s it is the same for dogs’ bodies.In the Vet IMS office, my dog’s blood test could not detect any protein. The Vet IMS prescribed low dose Metronidazole, prednisone steroid and Ultamino prescription food. I continued with BIO- C. Within 24 hours my dog had NORMAL tootsie roll stools. Repeat: Within 24 hours my dog had normal tootsie roll stools. At the 2 week check my dog’s blood test results showed NORMAL albumin and NORMAL protein levels. We will confirm the great news in a month. The Vet IMS suspects IBD inflammatory bowel disease or IBS.Also I stopped using diarrhea medicines designed for dogs and cat sold in the pet store. My research revealed that they contain an ingredient that the FDA says is no longer fit for human consumption and can cause malabsorption in humans. Also I stopped giving my dog so much fiber so nothing competes with protein for absorption.So now I am planning a game plan with the Vet IMS, because dogs who suffered low protein can have future health consequences even after the protein level tests normal.
R.E.L. –
Diarrhea
This was not a good fit for my dog. It left my dog with diarrhea. When I switched back to my original Vitamin C brand everything was fine. You also have to use a lot of the product so you go through it quickly. The value just wasn’t there for me and I can’t say it was effective.
Chad B –
Quality product
Great source of vitamin c for my puppy.
ajsPHD –
Great Product
Great product and easy application.
Tron –
I recently incorporated Rx Vitamins Bio-C Vitamin C Immune Support into my pet’s wellness routine, and I am pleased to share the positive impact it has had on their overall health. While no supplement can replace a balanced diet, this product has become an integral part of supporting my furry friend’s immune system.One of the standout features of this supplement is its palatability. My pet doesn’t hesitate to consume it, making administration a breeze. The powder form easily blends into their food, and there’s no discernible change in taste or texture that might deter a picky eater.The immune-boosting benefits of vitamin C are well-known, and this product delivers on that front. I’ve noticed a positive difference in my pet’s resilience, especially during seasons when immune challenges are more prevalent. It provides an extra layer of defense that complements their overall health and well-being.I appreciate that Rx Vitamins emphasizes the use of bioavailable vitamin C in this formula. This ensures that the supplement is absorbed efficiently, maximizing its effectiveness. Knowing that my pet is receiving a high-quality, bioactive form of vitamin C gives me confidence in the product’s ability to support their immune system.Furthermore, the dosage instructions are clear and straightforward, making it easy to tailor the supplement to my pet’s specific needs. The inclusion of a scoop for precise measurement adds to the convenience of administering the correct amount.While the positive effects on my pet’s health are evident, it’s important to note that individual responses may vary. It’s always advisable to consult with a veterinarian before introducing any new supplement to a pet’s diet.For the first week or two dose low and work your way up to the correct amount otherwise you’re risking your pet getting soft poop.In conclusion, Rx Vitamins Bio-C Vitamin C Immune Support for Pets has become a valuable addition to my pet care routine. With its palatability, immune-boosting benefits, and emphasis on bioavailability, it’s a product I can confidently recommend to fellow pet owners looking to provide their furry companions with extra immune support.
Señor J –
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