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Vita Flex MSM

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Product Summary:

Vita Flex® MSM

Vita Flex® MSM is ultra pure methylsulfonylmethane, a naturally occurring source of bio-available sulfur, an essential mineral for both large and small animals. MSM is a form of organic sulfur found in all living organisms and is the primary metabolite of DMSO (dimethylsulfoxide). Since 1988, horsemen and pet owners have relied on the quality and value of Vita Flex® MSM to deliver the benefits of this unique ingredient.


  • Pure dietary methylsulfonylmethane, the primary metabolite of DMSO
  • A natural source of sulfur
  • Recommended by veterinarians
  • Odorless, white crystalline granules that are easy to give
  • Made in the U.S.A.
Item Specifications:

Active Ingredient per 1/3 oz.:
Methylsulfonylmethane (MSM) (99.8% pure): 9430mg

Directions for Use:
Enclosed scoop holds 1/3 oz.
Canine and feline: Give recommended level twice daily for the first 7 days, reduce to once daily for maintenance. Add to food dry or dissolve in lukewarm water first. (¼ tsp = 1g MSM)
Up to 45 lb. body weight: ¼ tsp
45 to 90 lb. body weight: ½ tsp
Above 90 lb.: ¾ tsp
Equine: Give one scoop (1/3 oz. by weight) twice daily for the first 7 days. Give one scoop thereafter for daily maintenance, or as directed by veterinarian. Increase supplementation of large breeds proportionately according to body weight in excess of 1,000 lb.

For use in equines, canines and felines only. Safe use in pregnant animals or animals intended for breeding has not been proven. If animal’s condition worsens or does not improve, stop product administration and consult your veterinarian. Keep out of reach of other animals and children. In case of accidental overdose, contact a health professional immediately. This product should not be given to animals intended for human consumption. Store in a cool, dry place. Reseal after each use.

4 lb. (192-day supply)

For Product Label and MSDS Sheet, please click on Manufacturer’s Information to the right.

Downloadable Resources
Product LabelManufacturer Information
MSDS SheetManufacturer Information
Style Item Number Model Number UPC
1lb SLT120286 001 3000093 758900002050
2lb SLT120286 002 3000095 758900002074
4lb SLT120286 004 3000097 758900002098
10lb SLT120286 010 3000094 758900002111
20lb SLT120286 020 3000096

Product Reviews by Customers

4.9 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
4.9 / 5
4.8 / 5
Recommend to a Friend
Yes (8)
I would recommend it!
I use Vita Flex MSM for my older quarter horse that has heaves and this product really helps him.
November 5, 2017
9 months ago
this product really helps my horses
The product is tasteless so my horses do not object to it at all in their grain. I can tell they are more comfortable while on the MSM plus it is not cost prohibitive if you are on a budget(which I am).
March 12, 2017
This really works!
I have a rescued OTTB, he has suffered many injuries, making it hard to finally find what works for him. I have tried several joint supplements, all upset his stomach. As a last resort, found Vita Flex MSM, had it shipped overnight. Two scoops a day for the first 5 days was too much for him, dropped down to one scoop, mixed in apple sauce, mixed in his ADM Senior Glo, and finally he is doing much better. His old injuries heal much faster, making down time seem like nothing. We are at the 30 day mark now, and only expect him to keep getting better. Also my 8 year old Blue Heeler with really bad hips, has been taking 1/8 tsp daily for 30 days and his hips no longer give out on him. I highly recommend this product.
April 28, 2016
Been using for 20 years
I started using this with my horses 20 years ago upon recommendation of my vet and I'm still using (new horses). It's one of the ingredients that goes in their daily rice bran. A little goes a long way.
December 16, 2015
Perfect for every horse, everyday.
Vita Flex MSM is a great product for every horse. I make sure that all of my horses are on some kind of joint maintenance- from my retirees to my sport horses. Vita Flex MSM is affordable and effective supplement for all of my horses. Highly recommend this as a staple item in your feed room!
June 4, 2014
I have been giving MSM to my horse every day to keep his joints strong and flexible. It is a really good product for a great price. It is an excellent product for horses over 20 years old.
May 15, 2014
A+ rating for this supplement
Recommended for mine as he was transitioning into his new life. Worked very well to reduce his leg swelling and alleviate soreness in muscles he hadn't used in years. Seems happier and a more willing riding partner.
April 3, 2014
Helps my horse with arthritis
I have been using this product for several years for my senior horse. She has arthritic problems and this has been a big help. I have doubled the dose by recommendation of a vet at Ohio State University. It is safe and gives her more mobility. Check out this product and discuss it with your vet to get their opinion. I mix it with other supplements and add to beet pulp that has been soaked for several hours and then mixed in with the grain. She eats it without any hesitation.
September 19, 2013
great product!
Started my dog and 1 horse on this 2 weeks ago. My dog is really acting perky, he is 16 years old! The horse is harder to tell, i am trying it for skin issues and is difficult to tell yet.
August 7, 2013
Better Than Smartpaks
I ordered this product after having used smartpak joint supplement maintenance for two yrs and became disatisfied with their product. My mare is 24 yrs old and will "stock up" in her hind legs esp in winter, I noticed she became increasingly uncomfortable, esp after riding her. I realized the Smartpaks had changed their product and dosage increased shipping & product cost. I needed a better product & honest company. I Found VITA FLEX MSM, on and my mare has done wonderful on this joint supplement and looks and feels so much better. Shes a picky eater and gobbled this down with her grain. I would recommend this product to anyone. Its cost effective, works wonders, picky eater approved AND i can still get auto shipments with much cheaper shipping rates. This site never lets me down!
December 28, 2012
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Browse 1 question Browse 1 question and 12 answers
Why did you choose this? Store
Helps my aging horses
BECKY R on Aug 29, 2017
I've been using it for years on recommendation of vet.
MARGARET M on Dec 12, 2015
Helps my aging horses
BECKY R on Aug 29, 2017
Quite a few years ago my vet recommended I try this for my horse that gets a hay cough, it works great! I tried a different brand once and the cough came right back.
GILLIAN T on Nov 15, 2016
I've been using it for years on recommendation of vet.
MARGARET M on Dec 12, 2015
Because it is the best quality MSM on the market
Alice G on Dec 4, 2015
I started using this last year in the hopes that it would enhance the CORTA-FLX.
I can't honestly say I have seen a notable difference but I use it in hopes it does.
It is certainly inexpensive enough to give a try.
CAROLYN M on Jul 3, 2015
price and manufacturer
DAWN N on May 12, 2015
My horse is a Paso and my Vet recommended MSM to keep his tendons healthy
KERRITH V on Apr 30, 2015
Arthritis in my senior! 29 yrs old!
Lisa H on Dec 20, 2014
price and ingredients
Pamela M on Jun 9, 2014
recommended by my vet for my horse
KAY M on May 2, 2014
Have two older horses that are stiff.
JENNIFER M on Apr 3, 2014
High quality product and it works.
Kathleen D on Feb 11, 2014
Quite a few years ago my vet recommended I try this for my horse that gets a hay cough, it works great! I tried a different brand once and the cough came right back.
GILLIAN T on Nov 15, 2016
Because it is the best quality MSM on the market
Alice G on Dec 4, 2015