MSM Joint Supplements for Pets

Methylsulfonylmethane (MSM) is a naturally occurring sulfur compound that supports joints and connective tissue. MSM joint supplements by Vetri-Science for dogs, cats, and horses protect cartilage and support joint health.

Methylsulfonylmethane (MSM) supports joint function and connective tissue health in cats and dogs. It may also reduce the pain, stiffness, and inflammation associated with osteoarthritis. Methylsulfonylmethane EQ does the same for horses. These products are of use to active, aging, and arthritic animals, and to those that can otherwise benefit from a supplement that protects and improves the condition of joints, cartilage, and other connective tissue.

Benefits of Methylsulfonylmethane:

  • Preserves and increases cartilage
  • Promotes joint and connective tissue health
  • Improves comfort and mobility
  • Helps active and elderly animals, as well as those with arthritis, hip dysplasia, and other degenerative joint conditions
  • Reduces pain, inflammation, and stiffness in animals with joint conditions
  • Prevents weight gain, depression, and other problems associated with limited mobility and chronic joint pain
  • Two products for cats and dogs and one specially formulated for horses
  • Safe and easy oral administration

Read the instructions and precautionary statements provided by the manufacturer before use.

Use as recommended by your veterinarian.


  1. Use Methylsulfonylmethane 250 mg for cats and small dogs. Give 1 capsule per 10 lbs. of body weight daily.
  2. Use Methylsulfonylmethane 500 mg for medium and large dogs. Give 1 capsule per 20 lbs. of body weight daily.
  3. Divide doses made up of more than 1 capsule evenly between the morning and evening.
  4. Give horses 1 level scoop (1,200 mg) of Methylsulfonylmethane EQ twice daily, in the morning and evening, for an initial loading period of 5 days.
  5. Reduce horses to Ā½ scoop (600 mg) of Methylsulfonylmethane EQ twice daily, in the morning and evening, for the maintenance dose afterwards.

Frequency of Use:

Methylsulfonylmethane should be given once daily, unless the dose is comprised of more than 1 capsule; in such cases, divide the dose evenly between the morning and evening. Methylsulfonylmethane EQ is given twice daily.


Keep out of reach of children and animals.

Store Methylsulfonylmethane (MSM) in a cool, dry location.

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Methylsulfonylmethane Active Ingredient (per capsule): Methylsulfonylmethane (MSM) 250 mg or 500 mg

Methylsulfonylmethane Inactive Ingredients: rice flour, vegetable stearate

Methylsulfonylmethane EQ Active Ingredient (per 12 gm scoop): Methylsulfonylmethane (MSM) 1,200 mg

Methylsulfonylmethane EQ Inactive Ingredients: 0.1% silicon dioxide (to prevent caking)


Keep this product out of reach of children and animals. Do not use or store in or near open flame or heat.

Methylsulfonylmethane is only intended for use in cats and dogs. Methylsulfonylmethane EQ is only intended for use in horses. Not for use in other animals. Not for human consumption.

Consult your veterinarian before beginning a methylsulfonylmethane (MSM) regimen in any animal.

CAUTION: These products have not been demonstrated to be safe in pregnant and breeding animals.

If an animal's lameness does not improve or gets worse with use, discontinue administration and consult your veterinarian.

Individual sensitivities can occur. Talk to your veterinarian about any adverse effects Methylsulfonylmethane or Methylsulfonylmethane EQ has in your animal.

Contact your veterinarian right away in the event of an overdose.

Methylsulfonylmethane EQ is packaged by weight, not volume. Some settling may occur.

Warranty and Manufacturer Information:

Distributed by Vetri-ScienceĀ® Laboratories, A Division of FoodScience Corporation, 20 New England Drive, Suite 10, Essex Junction, VT 05452 USA



Methylsulfonylmethane 250 mg: NAC No.: 61660380

Methylsulfonylmethane 500 mg: NAC No.: 61660390

Methylsulfonylmethane EQ: NAC No.: 61660810

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