Methyl B-12 Supplement

(12 reviews) Write a Review

Product Overview

Crucial for a healthy nervous system, brain function and supports intestinal health 

PetTest Methyl B-12 is also called methylcobalamin. It is a vitamin not produced naturally in the body and must be obtained through specific foods and dietary supplements. Methyl B-12 is important for cell growth, the burning of fat and carbs, and the health of the nervous and brain systems, among other internal processes. Some dogs such as Border Collies, Australian Shepherds, Chinese Shar-Peis, and Beagles may be predisposed to absorbing vitamin B-12. Because Methyl B-12 goes through the body so quickly, each meal you feed your dog should contain this vitamin. 


  • Vitamin B-12 (as Methylcobalamin) 5000 mcg
  • Supports a Stronger Immune System 
  • Formation and Growth of Red Blood Cells
  • Helps with Having a Healthy Digestion
  • Helps to Prevent Pancreatic Disease 
  • Boosts the Health of the Nervous System 


Cats & Small Dogs (22 lbs. or less)            3 drops daily
Dogs (between 23-45 lbs.)                  0.25 mL daily
Dogs (between 46-110 lbs.)          0.5 mL daily
Dogs over 110 lbs. Start with 1 mL daily for a month, then recheck your dog's B-12 levels and adjust based on serum levels


Store at room temperature out of direct sunlight. Always consult your veterinarian when trying a new supplement or treatment for your pet.


(12 reviews) Write a Review

12 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Jim Flaherty on Apr 20th 2024

    I have been using this supplement since my dog was diagnosed with diabetes (approx. 18 Months) and was having problems with her back legs. She now has no problems.

  • 5
    Methyl B-12

    Posted by Bethany Sebastian on Nov 6th 2023

    Started methyl B-12 about a year ago because my pup was having hard time with hind leg weakness. After a week of methyl B-12, she was good as gold. This is a daily supplement that she receives.

  • 5
    B-12 much needed

    Posted by Rosa Kurtz on Nov 4th 2023

    All dogs especially diabetic dogs need B12. Pet Test has the best version and it lasts a long time. Great value, great company.

  • 5
    Methyl B12

    Posted by Michelle Miller on Jun 26th 2023

    Great product and lasts a long time. I give this to my 45 lb dog and one bottle lasts over four months. Thank you PetTest for supplying us with human-grade, top quality supplements!

  • 5
    Methyl B-12

    Posted by William Kessler on May 17th 2023

    Excellent company with quality products

  • 4
    Good and convenient

    Posted by Pepper on Dec 3rd 2022

    I have been using this product for about 4 months now. Re-purchased this bottle so we will have it available on hand. It's a good product to help my dog's mobile strength. The one thing I wish could be better is the dropper. It's very hard to use for a consistent measurement all the time.

  • 5
    Great Product

    Posted by Nicolle Berish on Oct 22nd 2022

    Great product! I’ve used this b 12, the test strips, reader , and I am satisfied with every product I’ve purchased ! I’m a very happy customer and will continue to purchase items ! Thank you for great products!

  • 5

    Posted by Nicolle on Oct 21st 2022

    This product works great, and i truley believe any of the products that ive purchased the pet tester, strips, b12 whatever it is im satisfied and a very happy customer!

  • 5
    Methyl B12

    Posted by Carol Weyandt on Oct 6th 2022

    I started my sugar baby Button on the Methyl B12 , OMG it has helped him tremendously I’m so happy, I would definitely recommend this for sugar-babies ❤️❤️❤️