Jackson Galaxy B12 Vitamin Supplement for Adult Cats, 1-fl oz bottle

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At a Glance

  • Immune Support
  • Vitamins & Minerals
  • Made in USA
  • All Lifestages
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$37.95 Chewy Price
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About This Item

Details

  • Supports immunity health, kidney health, nervous system health, pancreas health, gastrointestinal health and cognitive health.
  • Helps improve appetite, increase energy and vitality, improve cognitive and neurologic systems, and promote weight gain in malnourished feline friends.
  • Made in the USA with zero corn, wheat, soy, artificial flavorings or preservatives.
  • Helpful for senior sidekicks who no longer can absorb B12 the way they could when they were younger.
  • Safe to use with other holistic solutions.

Ingredient Information

Instructions

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Questions & Answers

11 Customer Questions

Has this product been tested to work on cats who have been verified as low in B12 by blood work?

Answer by Joe1Hill • Aug 02, 2024
I don’t know if this specific product is, but methylcobalamin is very successful in reversing low b12 in humans and that has been studied heavily. Since b12 is a mammal thing and not just a human thing, it should work very similarly in cats.

What are the dosing instructions? How long does this bottle last when using it daily?

Answer by Judy • Apr 12, 2025
I give my cats 4 drops of the B12 every night. A bottle usually lasts about 4 weeks but keep in mind, I have 3 cats. If you have fewer cats, it will probably last longer. I don’t have any problems with them taking it. I just mix it in with their food and they nom no it right down.

Can I syringe the doses? Or does it taster nasty?

Answer by Chewy • Nov 29, 2022
This B12 supplement can be administered in food or water, though it’s recommended in food to get the full dosage.

Whats the shelf life of this product?

Answer by Chewy • Jul 15, 2023
Once opened, this supplement is good for up to 3 years, if stored properly. Unopened bottles stored in a cool cupboard will often last longer than 3 years. Store this out of direct sunlight and away from strong odors (cosmetics, medicines, spices) or electromagnetic fields (microwave, refrigerator, stereo). In other words, a cabinet is best.
Reviews
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4.5
Rated 4.5 out of 5 stars
215 Ratings
Terms & Conditions

Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Effectiveness

85% Positive

Form and Administration

87% Positive

Ingredients

88% Positive

Nutritional Value

89% Positive

95 Customer Reviews

Rated 5 out of 5 stars
By Debbie on Jan 18, 2026

Obviously working

My cat has chronic enteritis, which means he is frequently B12 deficient. The vets found research showing that the effectiveness of oral B12 and injected B12 is

My cat has chronic enteritis, which means he is frequently B12 deficient. The vets found research showing that the effectiveness of oral B12 and injected B12 is not significantly different. I give him this every day and save on vet visits and frequent blood work, not to mention the nuisance of uncomfortable shots. I tasted this stuff and it had no taste to me, so my cat did not drool and spit it up.

Rated 1 out of 5 stars
By Felix on Dec 29, 2025

Worsened stool situation

I bought this to address a chronic diarrhea problem in my 14 year old cat, as his vet recommended adding b12 to his diet. He’d had chronic diarrhea for 3 months

I bought this to address a chronic diarrhea problem in my 14 year old cat, as his vet recommended adding b12 to his diet. He’d had chronic diarrhea for 3 months (it started with pre-dental surgery antibiotics, and nothing has resolved it yet), which was at least manageable. 3 days after I started adding this to his diet, blood appeared in his stool, and he started having accidents. It may not have been the fault of this product, as he has other issues going on, but this didn’t help, at best.

Rated 5 out of 5 stars
By Joanna on Nov 10, 2025

Extremely High Quality B12

Thank you so much to Chewy and Jackson Galaxy for making this very high quality form of B12 available for my kitty Marshmellow. I suffer fron B12 deficiency myself

Thank you so much to Chewy and Jackson Galaxy for making this very high quality form of B12 available for my kitty Marshmellow. I suffer fron B12 deficiency myself as a human so I know firsthand how important this vitamin is. The ingredients in this product are top-notch and the dropper bottle is extremely easy to use and high-quality. Very easy to measure and mix into Marshmellow's wet food and he eats it just absolutely fine. I must also add that I emailed the Jackson Galaxy team a question and a thank-you regarding this product and they replied immediately very kindly and thoroughly. Absolutely love everything about this product and I'm grateful to Jackson Galaxy and Chewy for making it so accessible and easy for me to reorder quickly when I'm getting low! Thank you!!!!

Rated 5 out of 5 stars
By Jasie on Oct 20, 2025

Picky sick senior cat takes it with no problem

My senior diabetic cat was diagnosed with pancreatitis and IBD recently. Cats with these illness are often prone to B12 deficiency. All B12 injection supplement

My senior diabetic cat was diagnosed with pancreatitis and IBD recently. Cats with these illness are often prone to B12 deficiency. All B12 injection supplement needs prescription, so I wanted to try the oral one first. This one is Methylcobalamin, which is easier to absorb than the Cyanocobalamin. My senior cat is a picky eater, especially when he's sick, but he takes this supplement with no problem. Just drop some into his wet foods and he will eat everything like nothing happened. Turned out his bloodwork came back and showed no signs of B12 deficiency (blood example taken before using the supplement), but I will keep using it occasionally just in case.

Rated 5 out of 5 stars
By Nancy on Dec 27, 2025

It's helping her absorb nutrients

Gilly was recently diagnosed with a pancreatic enzyme deficiency. This supplement, along with her Rx medication, is helping her absorb nutrients. She is gaining

Gilly was recently diagnosed with a pancreatic enzyme deficiency. This supplement, along with her Rx medication, is helping her absorb nutrients. She is gaining weight and looking so much healthier.

Rated 5 out of 5 stars
By Rachel on Dec 7, 2025

Great for tummy troubles

After paying out the nose for a b12 injection at the vet, I got this for when anyone has stomach issues. Obviously, not medical advice, this is good to have on hand

After paying out the nose for a b12 injection at the vet, I got this for when anyone has stomach issues. Obviously, not medical advice, this is good to have on hand to try before a vet visit and it’s helped my cat when she gets a sour stomach and gets sick.

Rated 5 out of 5 stars
By Katrina on Sep 28, 2025

Hyperthyroidism

I did not feel my cat Java was not truly absorbing proper vit n nutrients because of this disease thyroid issue she has she is only ten. Hungry all the time weight

I did not feel my cat Java was not truly absorbing proper vit n nutrients because of this disease thyroid issue she has she is only ten. Hungry all the time weight loss I tried all summer even with going on four months of methalmazol for her thyroid she is black n lost a total of three pounds in one year. I do not and still do not like that with her. I want her to gain it back. Finally her gut with this b12 she can bsorb the. Utrients from her food and rest. I do notice n see a difference lol find out more when she goes to her vet November 20. Praise the lord

Rated 5 out of 5 stars
By TINA on Nov 16, 2025

From pale to normal

My 1yr old cat - Alina is an indoor cat, and having access to sun through the window is a no-no here in Louisiana, so her eyelids were beginning to look pale (for

My 1yr old cat - Alina is an indoor cat, and having access to sun through the window is a no-no here in Louisiana, so her eyelids were beginning to look pale (for lack of sun - and all it has to offer.) This B12 fixed the problem and now it's her daily intake.

Rated 5 out of 5 stars
By Stacey on Dec 20, 2025

Nice storage bottle

This has helped me get my male cat Milo back to health. And earier yo get the going to vet once a week for a shot. Yes I give it everyday but he dont mind it. Thank

This has helped me get my male cat Milo back to health. And earier yo get the going to vet once a week for a shot. Yes I give it everyday but he dont mind it. Thank u.

Rated 5 out of 5 stars
By Ariana on Nov 3, 2025

Worked within 24 hrs

My cat, Clover, struggled with persistent diarrhea for over a year. The vet diagnosed her with IBD and while we were figuring out her medication and care plan, the

My cat, Clover, struggled with persistent diarrhea for over a year. The vet diagnosed her with IBD and while we were figuring out her medication and care plan, the vet recommended I give Clover vitamin B. Right before administering the vitamin B we were in an especially rough patch. Clover had been having nonstop diarrhea and vomiting, with blood in her stool for several weeks. We gave her antibiotics that helped firm her up a bit, but once the course completed she was back to diarrhea. Then I gave her the vitamin B and she’s had completely solid stools since. It’s been two months since and she’s still going strong. I’ve already ordered this supplement twice and will continue to do so for the foreseeable future.