"A perennial Horse Journal favorite for sore-muscle support" - Horse Journal, June 2013

  • Category: Vitamin Supplements
  • Brand: MVP Med-Vet Pharmaceuticals
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E-SE-MAG™ contains the first unique combination of high levels of Vitamin E, selenium and magnesium. As reported in the Horse Journal , vitamin E and selenium supplementation may aid in nutritional support in the presence of sore muscle problems.  Determine total selenium content in ration prior to supplementation.  Pellets.


Guarnateed Analysis (per 1 oz serving):

Magnesium (Mg), Min.........3,000 mg

Selenium (Se), Min.....................2 mg

Vitamin E, Min......................1,000 IU

Feeding directions:  Provide 1/2 to 1 oz daily. 



Click here for more information on Tying-Up and PSSM                                               



(Excludes Sand-Free)

The map below indicates ground transit time via Fed Ex. All orders placed before 3:00 p.m. CST will be shipped the same day.  ALL orders placed Friday (after 3PM)/Saturday/Sunday will be shipped the following Monday.


Orders placed over the weekend (Friday after 3PM/Saturday/Sunday) will be shipped the following Monday.  All vaccines orders are shipped to be received within the same week (ie. Any order placed Wednesday (after 3 p.m. CST), Thursday or Friday to ship 2 day air, we will hold your order to ship on the following Monday).  No vaccines will be shipped on a Friday.

We strongly recommend ALL vaccine orders be shipped 2nd day or Next day air. Vaccines not shipped in this manner are non-returnable/non-refundable.  All vaccine orders are shipped in a bio-cooler with ice ice packs.  

2-DAY AIR:  $22.00
Next Day Air:  $35.00

NOTE  Express order delivery time:  Example:  2 day air (2 business days) - if your order ships on Monday, you will receive it Wednesday.  Air shipping Flat Rates apply to FedEx service only.  Vaccines are not shipped on Fridays - NO Saturday express deliveries unless requested (additional express charges will apply).

WEATHER DELAYS:  We are not able to reimburse air charges due to inclement weather that is not in our control.



Unless item is designated "FOB", or marked "Freight Charges Apply" shipping by ground service is FREE within the contiguous 48 states (Fed Ex ground or SpeeDee only).

 MVP supplements ship FREE (Exlcuding Sand Free).

If shipping to a commercial address: Your package will be delivered during the work week (Monday through Friday).

WHEN ORDERING REMEMBER $35.00 minimum order necessary for shipment.
$35.00 - $75.00 order add $6.95 handling.
ALL products marked FOB (Freight On Board) OR Freight Charges Apply - will incur a freight charge.








National Animal Supplement Council (NASC), an industry group dedicated to protecting and enhancing the health of companion animals and horses throughout the United States. Founded in 2001, NASC Members are industry participants and other stakeholders of the finest animal supplements who are committed to the highest current standards of quality in the industry today.

The Council's overriding goal is to promote the health and well-being of non-human food chain animals that are given nutritional supplements by their owners, and to protect and enhance the integrity of the animal supplements industry.

The cornerstone of NASC's mission is to work cooperatively with state, federal, and international governmental officials to create a legislative and regulatory environment that provides a framework that is Fair, Reasonable, Responsible and Nationally Consistent.

Such an environment of safety, accuracy and quality serves the interests of NASC's members by ensuring that ethical manufacturing and labeling practices are complied with throughout the industry.

NASC Seal of Quality…

As part of its ongoing effort to improve and standardize the animal supplement industry, NASC initiated its Quality Seal Program. The Seal is a way for consumers to know that when they buy a product, they buy from a reputable manufacturer that has successfully completed a facility audit. Different from theNASC logo, the Seal is a privilege for members to use on their products and signifies that the company has been audited for the implementation of specific standards. Members must agree to adhere to NASC’s quality standards, part of which includes submitting to an independent audit to ensure conformance with quality system requirements.


Magnesium (Mg) is a macro mineral that is frequently recommended for a wide range of equine health conditions. Magnesium helps to maintain normal muscle and nerve function, a healthy heart, healthy immune system and strong bones. Magnesium aids to regulate blood sugar levels, promotes normal blood pressure, and known to be involved in energy metabolism and protein synthesis. Since a symptom of magnesium deficiency is agitation or anxiety, it is included in many calming supplements.

Vitamin E is considered the most important antioxidant and works closely with selenium to protect the body from the oxidative stress of exercise and illness. Found in high amounts in fresh pasture, levels begin to decay the moment pasture is cut for hay. That is why any horse that does not have access to grass, regardless of its activity level or health, would be a candidate for vitamin E supplementation. Horses are not very efficient in storing vitamin E and deficiency may be accelerated if the diet is deficient in selenium.

Selenium is a trace mineral that along with vitamin E function together to help to protect body tissues from free radical damage that occurs during oxidation (the conversion of feedstuffs into energy). While some parts of the country have high levels of selenium in their soil and therefore the plants that grow there, selenium deficiency is not uncommon and reported in many states. Therefore, most horses may require supplementation to meet the NRC requirement of 1-3 mg/day, depending on activity level. *NRC upper safe limit approx. 20 mg/day in total diet.



SKU:  Size FOB Cost/Serving Price Quantity
73160164 10lb (160 servings) Foil Bag Ships FREE 47¢ $74.75
73160172 20lb (320 servings) Bucket Ships FREE 44¢ $141.00

Product Ratings and Reviews

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5.0 out of 5.0 stars
  • Megan
  • Hibbing, MN
  • Friday, January 25, 2019
My horse was experiencing tight muscles and lameness issues. After I put him on this, I noticed a huge difference! He does not get to eat fresh grass in the pasture so this was a wonderful supplement to add to his diet.
  • Sierra
  • Chipley , FL
  • Sunday, July 8, 2018
Love this! My horse needed extra magnesium and vitamin E. Her overall performance and health has showed me this product is the real MVP!
  • Barry
  • Wykoff, MN
  • Tuesday, February 20, 2018
For my endurance horses and coming from a selenium deficit area I need the balance of the Vit E along with the Magnesium and the selenium to give my horses the ingredients they need for the long distances and speeds that we do along with the conditioning that is so necessary in my sport. It does a wonderful job giving that to my Arabians.
  • Amanda
  • ,
  • Friday, October 27, 2017
Have been using MVP E-Se-Mag for over a year. Excellent product for my selenium deficient area, all horses and one donkey are doing beautifully on it :) Palatable pellets are easy to feed. Also love the 20lb reusable bucket.
  • Alicia
  • Junction City, OR
  • Sunday, February 26, 2017
My reiner was experiencing a really tight back. Even though she was already on a selenium product, my vet recommended putting her on e-se mag. I added it to her feed and made it really made a big difference in relaxing those tight back muscles. Very please with the result and now have a much happier horse.