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Med-Vet Pharmaceuticals (MVP) — Item #12419
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Nutrition for horses fed grass-type forage

  • Comprehensive selection of vitamins & minerals plus probiotics, yeast & amino acids
  • Formulated to coincide with current NRC (National Research Council) recommended daily requirements
Mega-Cell™ (Pellet) is a well-balanced multi-vitamin and mineral supplement formulated to coincide with current NRC (National Research Council) recommended daily requirements, to accommodate feeding programs consisting of grass-type hays (timothy, coastal, Bermuda, native grass)/grain-based diets. The addition of live, stabilized direct fed microbials, live cell yeast culture, and amino acid content, sourced from alfalfa meal, rice bran, and soybean meal makes Mega-Cell™ an excellent choice to support growth, stamina, conditioning, and maximum performance for all disciplines.

Note: To accommodate feeding programs consisting of alfalfa hay/grain based diets, choose Mega-Mag™.

View our Multi-Vitamin Supplement Comparison Chart


Guaranteed Analysis Per 2 oz:
(Maintenance Dose = 1 scoop (1 oz) daily)
Ingredient Per Serving Per Pound
Lysine (Min) 850 mg 1.5%
Methionine (Min) 425 mg 0.75%
Glycine (Min) 340 mg 0.6%
Calcium (Min) 3,118 mg 5.5%
Calcium (Max) 3,685 mg 6.5%
Phosphorus (Min) 1,655 mg 2.9%
Magnesium (Min) 3,000 mg 5.3%
Potassium (Min) 470 mg 0.82%
Sulfur (Min) 255 mg 0.45%
Copper (Min) 75 mg 1,320 ppm
Selenium (Min) 1.8 mg 32 ppm
Zinc (Min) 250 mg 4,400 ppm
Manganese (Min) 182 mg 3,200 ppm
Iodine (Min) 2.5 mg 44 ppm
Cobalt (Min) 500 mcg 8.8 ppm
Vitamin A (Min) 20,000 IU 160,000 IU
Vitamin D3 (Min) 2,000 IU 16,000 IU
Vitamin E (Min) 500 IU 4,000 IU
Ascorbic Acid (Vitamin C) (Min) 30 mg 240 mg
Choline (Min) 300 mg 2,400 mg
Niacinamide (Vitamin B3) (Min) 80 mg 640 mg
Thiamine (Vitamin B1) (Min) 60 mg 480 mg
Riboflavin (Vitamin B2) (Min) 60 mg 480 mg
d-Pantothenic Acid (Vitamin B5) (Min) 60 mg 480 mg
Pyridoxine (Vitamin B6) (Min) 20 mg 160 mg
Folic Acid (Min) 15 mg 120 mg
Biotin (Min) 1 mg 8 mg
Vitamin B12 (Min) 200 mcg 1.6 mg
Direct Fed Microbials (Bacillus subtilis and Bacillus licheniformis) 1 billion CFUs 8 billion CFUs
Ingredients:: Alfalfa meal, heat stabilized rice bran, corn distillers dried grains with solubles, soybean meal, yeast culture (saccharomyces cerevisiae), L-lysine monohydrochloride, DL-methionine, glycine, calcium carbonate, monocalcium phosphate, magnesium oxide, magnesium proteinate, copper protienate, copper sulfate, sodium selenite, selenium yeast, zinc proteinate, zinc sulfate, manganese proteinate, manganese sulfate, ethylenediamine dihydroiodide, cobalt proteinate, Vitamin A acetate, cholecalciferol (source of Vitamin D3), dl-alpha tocopheryl acetate (source of Vitamin E), ascorbic acid, choline chloride, niacin supplement, thiamine mononitrate, riboflavin supplement, d-calcium pantothenate, pyridoxine hydrochloride, folic acid, biotin, vitamin B12 supplement, dried bacillus subtilis fermentation product, dried bacillus licheniformis fermentation product, dried aspergillus oryzae fermentation product, beta carotene, soybean oil and natural flavors.


Instructions for Use:
Feeding Instructions: (Enclosed measure approximates 1 oz) Adult Horses (900-1,000lbs): Provide 1-2 ounces daily. Consult your veterinarian for specific usage.

Clinical Research

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    out of 5
    96% of customers would recommend this product to a friend!
    Tell us what you think!

    The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

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    Mega-Cell™ is rated 4.8 out of 5 by 214.
    Rated 5 out of 5 by from Very nice with a hay diet Having switched to a complete hay diet I was looking for a multi-vitamin to go along with it. I choose this for price and for what was in the ingredients. Perfect for a horse that is not being worked hard.
    Date published: 2017-11-24
    Rated 4 out of 5 by from Excellent Supplement I purchased this Supplement a month ago for 2 ponies and a horse to supplement their grass hay diet. I am very happy. The horse and ponies have dappled, shiny coats and I feel it fills any nutritional gaps. All of them eat the Supplement and seem to like the taste.
    Date published: 2017-07-25
    Rated 5 out of 5 by from Excellent product! I bought this product for my 5 year old mustang mare. She's an easy keeper, so I want to keep her fit but make sure she gets good nutrition. This supplement has a great balance of everything, is low calorie, and is economical. It looks to be complimenting her grass hay well; she's a copper penny chestnut and actually has faint dapples! Everyone who sees her thinks she looks great.
    Date published: 2017-07-06
    Rated 5 out of 5 by from Great product for the price I have had my 3 horses on this vitamin for over ten years. My 30 year old Hanoverian looks and acts like she is 15. No sway back or loss of muscle tone.The other 2 are 22 and 25 years old. They look and act healthy. Gorgeous coats! Knock on wood, but I haven't had an emergency Vet call in several years.
    Date published: 2017-02-22
    Rated 5 out of 5 by from Seems to be working! My guys have been eating this for a little over a month now. In the last week or so I've noticed that my draft seems to have more energy than usual...which is a good thing :-))) Now when he sees me and starts walking towards me I can yell "ruunnnn" and here he comes! He looks happy and it makes me feels like he's getting everything he needs to be healthy.
    Date published: 2017-02-02
    Rated 3 out of 5 by from Good Product I was looking for an all around vitamin supplement to give since I feed oats. It needed to be cost efficient since I feed 16 horses. Mega Cell met those requirements and an added bonus was that they didn't fade nearly as much this past summer as they had being on another supplement.
    Date published: 2017-01-12
    Rated 5 out of 5 by from Love this supplement!! This is reasonably priced and effective! Both ponies and our horse happily eat it and they all have dapples and soft, shiny coats! Their hooves look great too.
    Date published: 2016-11-18
    Rated 5 out of 5 by from My picky eaters love it! I started my horses on Mega-Cell about 2 months ago and they love it! They've previously been picky eaters, so I'm happy to know now that they look forward to eating their vitamins!
    Date published: 2016-11-07
    Rated 5 out of 5 by from Our horses do great on this! I didn't realize that our horses were lacking in vitamins and minerals until I restarted them on this. My mare was showing symptoms of IR/cresty neck tendencies. It has certainly improved now that she has those missing nutrients back in her diet. :) And I also really like that there is no iron in this supplement.
    Date published: 2016-10-25
    Rated 5 out of 5 by from Works great for my pasture kept horses. My horses are all fat and shiny on Mega Cell. They have excellent hooves and coats. And they eat it right up!
    Date published: 2016-09-14
    Rated 5 out of 5 by from The most bang for your money I have been using this about 20 years. I have not found anything that compares to it, in ingredients, or price.
    Date published: 2016-07-25
    Rated 4 out of 5 by from Decent price and seems to do the job I'm on my second bucket of this vitamin supplement. My horses all eat it and it's a decent value for the money. I mainly feed a high quality forage diet and wanted something to help supplement necessary vitamin and mineral daily requirements.
    Date published: 2016-07-11
    Rated 5 out of 5 by from Great for my horse with ulcers My horse has ulcers, any salt forced on him upsets his stomach. Ulcer med's deplete Vitamin B's. Mega Cell has vitamin B like no other brand that I have researched without salt. His coat shines and he eats as if he's never had a stomach problem. I am confident that he is getting nutrients he needs in this supplement without forcing salt on him.
    Date published: 2016-06-29
    Rated 5 out of 5 by from Great My horse eats these pellets right up. He is not on any grain because he is a super easy keeper so this is perfect for him.
    Date published: 2016-06-14
    Rated 5 out of 5 by from Great product. Great value Complements our pasture and hay perfectly. Provides excellent broad based supplementation for our horses at a very economical price. Balancing these minerals brought hoof condition back better than the high priced hoof supplements. I would recommend a person start with analyzing pasture and hay first and balancing that with MegaCell for those on grass dominant diet before adding more to the equation. Super results.
    Date published: 2016-06-05
    Rated 4 out of 5 by from Easy to feed My mules eat it up. No sorting. Great packaging. Great ingredients.
    Date published: 2016-03-01
    Rated 5 out of 5 by from Love this product Affordable and ensures my horses get the nutrients they need for strong hooves. Since we keep them barefoot, it's especially important.
    Date published: 2016-01-05
    Rated 5 out of 5 by from Great Supplement! Recently bought a young horse and instantly put her on this. I've had her for two months and see a great increase in her coat and overall health! She looks healthy and shiny. With the price you can't go wrong!
    Date published: 2015-11-13
    Rated 3 out of 5 by from mixed taste reviews I bought this for my two horses and only one of them will eat it, so although it seems like a good product at a very good price, it is only actually working for one of my horses.
    Date published: 2015-11-12
    Rated 3 out of 5 by from Yum Pony likes the taste. I wish it had more pro and prebiotic, but for the price it seems good.
    Date published: 2015-11-05
    Rated 5 out of 5 by from So far so good. I purchased this as a supplement to my mustang's grass hay only diet. She has been in corrals for 4 years up until I adopted her 7 weeks ago. That being said, she has never had grain before (and really can't be due to her being an extremely easy keeper) and learning to eat this wasnt easy. I ended up making them into horse treats and she learned to like the taste and now eats them on their own. I can't tell you how this will effect her but I'm happy to see lots of vitamins not always in other supplements such as copper and zinc. We specifically were looking for a supplement containing a good amount of these due to her being black and fading quite considerably. Similar supplements of copper/zinc marketed for dark horses with the EXACT same amounts of the minerals are selling for over 40 bucks a MONTH. Copper deficiency is thought to be a huge reason for fading so I am looking forward to seeing how this works through winter and her spring coat next year. You could tell she had a lot of mineral imbalances and I can say that her new winter coat is coming in almost blindingly shiny and dark. Value wise, this supplement is unbeatable. What a wonderful, tasty product for such a great price. I will be using this for a long time to come. Thank you MVP for giving us such a great product at an actually affordable and sustainable price.
    Date published: 2015-10-15
    Rated 4 out of 5 by from Recommended Using this for my overweight easy keeper to balance her grass and hay diet.
    Date published: 2015-09-07
    Rated 5 out of 5 by from Love this stuff My horse has been on Mega-Cell for two months now. She had been tying up and that was the reason I started the supplement. She has had no problems with tie up, her coat looks amazing, her temperament has improved and her feet look great! Best of all, it is one of the very FEW supplements she will actually eat.
    Date published: 2015-07-30
    Rated 5 out of 5 by from 100% Worked just as well as the smartpak one, if not better and more affordable
    Date published: 2015-06-06
    Rated 1 out of 5 by from My horse will NOT eat this I haven't had issues before with my horse eating supplements, but now I can't get her to eat these even covered in molasses. I also tried adding fenugreek seeds. I've tried everything and its like trying to force a toddler to eat broccoli. Full disclosure: I used to have her on smartvite thrive, GUT, and a flax supplement. I changed her smartpak to this, cause she's on just pasture now. And I swapped the flax for smart bugoff. At first I thought it was the big off she hated, But I stopped giving her the bug off and she still won't eat this. Both this product and bug off smell medicinal, and this product smells STONGLY medicinal. I can't blame her for not wanting it.
    Date published: 2015-05-06
    Rated 5 out of 5 by from All the ingredients my horses need! I use FeedXL to balance my two horses diets and this has filled all the holes incredibly well! I was worried with how affordable it is that my horses wouldn't like it (my mare HATES the smartvite's) but both of my horses ate it up with out even giving it a sniff. I wish it had sodium in it like the smartvites do, but it's cheaper to give them a little loose salt on their feed in the morning anyway. Love this stuff and I think that even if you don't want to pay for FeedXL, there is good chance this supplement will fill the gaps in your horses diet without breaking the bank.
    Date published: 2015-04-10
    Rated 5 out of 5 by from my horse has never looked better He's been on Mega-cell just over a month and Im extremely pleased
    Date published: 2015-04-03
    Rated 5 out of 5 by from I bought this on the advice of a trainer. I am so glad I tried it my mare is doing really well and looks good.
    Date published: 2015-03-11
    Rated 5 out of 5 by from Good supplement I started using this supplement on my slightly anemic 3 year old OTTB gelding and wow, what a difference! He has more energy, and his winter coat is much more shiny and less dull. I highly recommend this supplement.
    Date published: 2015-03-02
    Rated 4 out of 5 by from Has many good vitamins in it! Have already noticed a difference in my hard keeper TB's weight and hair coat. Have also seen an improvement in 2 other mares personalities since only being on this for a little over a month.
    Date published: 2015-02-27
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