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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 Really noticed a difference My Arab gelding is on soaked alfalfa/timothy pellets (instead of grain) and 5-6 flakes of grass hay per day. Mega-Cell has been wonderful in giving him all the vitamins he needs, and I've seen an improvement in his energy, willingness to work, his attitude (just being happier in general), and his mane/tail/coat. Definitely recommend!
    Date published: 2015-02-25
    Rated 5 out of 5 by from Good to Balance a Hay based diet We switched our pony off of commercial grain products for a variety of reasons. He eats hay, alfalfa pellets, and whole oats. We added this multivitamin after looking at several choices with the Feedxl program. This was one that balanced what he needed for his work load and his diet. He is doing great on this diet/vitamin regimen.
    Date published: 2015-02-23
    Rated 4 out of 5 by from Easy to feed Great product for the price and finicky eaters seem to like it.
    Date published: 2015-02-11
    Rated 5 out of 5 by from Great Product! I fed a timothy hay and while feeding Mega-Cell I know my horse gets all the nutrients she needs. Her coat is looking good for the middle of winter as well as her feet. I think it is a great low cost product for those horses just needing a bit extra.
    Date published: 2015-02-05
    Rated 5 out of 5 by from Well Balanced Product for those Feed Grass Hays Have done a lot of research over the years -- this is a well balanced supplement and Smartpak offers a great price.
    Date published: 2015-01-03
    Rated 5 out of 5 by from Great overall supplement at a great value I went through all the different vitamins offered at SmartPak and decided to go with this because is contained all the vitamins I was looking for in decent levels and the price canot be beat. My picky eater had no problems with this supplement, and my mind was at ease knowing my horse was getting her nutrients on less than perfect hay.
    Date published: 2014-12-15
    Rated 5 out of 5 by from Good for picky eaters! My mares loves this (will eat it out of my hand), and I feel like it covers all the bases. Also, when fed at the two ounce dose along with a basic biotin supplement, it is very similar to the ingredients found in Double Strength Farrier's Formula.
    Date published: 2014-12-09
    Rated 4 out of 5 by from Needed a low cost winter supplement Since my mare comes off of her "summertime supplements" that help control sweet itch problems but are also packed with lots of good stuff, I needed something to keep her going through the winter. She only gets a handful of grain because of her big ole tummy so I don't want her going the next few months missing what she needs. This is a good replacement. Inexpensive, contains the basics and she gobbles it right up. I offered it to another horse at the barn and he wouldn't touch it, but he tends to be picky anyway.
    Date published: 2014-11-24
    Rated 5 out of 5 by from Picky Eater? No Problem I was looking for a multi-vitamin that covered all the bases for my mare over winter - she is still in partial training but mostly just being maintained. This had all the ingredients I was looking for and then some, so I know nothing is being missed. Plus, my picky mare doesn't even notice these tasty pellets in her grain. All at a reasonable price! Couldn't ask for more.
    Date published: 2014-11-11
    Rated 5 out of 5 by from great supplement I have always fed a multi-mineral vitamin supplement, because my horse only gets grass hay. I feel mega-cell is doing a fine job for my horse. I love the ease of feeding in a smart pak
    Date published: 2014-11-11
    Rated 5 out of 5 by from So far... so good! My 6-yr-old gelding has been on MegaCell for a little over a week, and I already see a positive difference! Before starting MegaCell he was trying to eat the dirt from the floor of the indoor arena so I realized he might have a mineral deficiency. He also tended to be more nervous than my mare, though I thought it was because he was fairly new to his herd of 20 horses (a few months). After a week on MegaCell, he has not only stopped trying to eat the floor of the arena, he just seems more relaxed and calm. Tonight in a group lesson we were doing a figure 8 pattern where we constantly crossed paths with other riders and their horses who he did not know very well, and he stayed calm and focused, not bothered when we'd cross just a couple feet from the other trotting horses. After a bit more reading I suspect he needed the Magnesium and B1. I will definitely continue with MegaCell or another SmartPak supplement with similar nutrients!
    Date published: 2014-10-23
    Rated 5 out of 5 by from Good vitamins Hair coat has improved dramatically within a month. Great for our young easy keepers!
    Date published: 2014-10-14
    Rated 5 out of 5 by from Great Product My paint/warmblood mix, is a pretty easy keeper. She gets hay and grass, and occasionally some grain when she come in. Giving her this everyday, I know she is getting everything she needs. And she loves the taste!
    Date published: 2014-10-10
    Rated 5 out of 5 by from Wonderful!!!! I love this product. I have only been using it for 6 weeks and I can already tell a difference in how shiny and soft my horses coat is now. I would recommend this product to anyone. Plus, my horse is a picky eater and he loves this stuff!!! A++++++
    Date published: 2014-08-25
    Rated 5 out of 5 by from It works! I have only been using this supplement for a little over a month so not very long. I will say that my gelding looks totally awesome, better than he looked last summer at this time. So, I do feel that it's probably this supplement, since not much else has changed. His coat is beautiful with no dandruff at all. very bright and shiny, and he seems to be feeling his best too! I did do alot of comparison and this one seemed like a good value/quality supplement for the money. My horse is not a picky eater, but I think the pellet form is great and he eats it very well in his grain.
    Date published: 2014-07-08
    Rated 5 out of 5 by from Good value vitamin I use this to complete my horses diet. I don't feed "grain" or commercial feeds...only forage. This vitamin is a good value and it helps my horses get all the vitamins they need. I have one horse that is super picky but he ate this no problem!
    Date published: 2014-06-12
    Rated 4 out of 5 by from Good over all vitamin Am giving this vitamin to 5 older horses. All will eat it on top of some pelleted grain given. My only thought is that the size of the pellet is very small, and I hope my horses are consuming all of the scoop.
    Date published: 2014-05-05
    Rated 4 out of 5 by from Helping my rescue! Bought MegaCell to help restore my new rescue's coat, eyes, and overall health. After 8 weeks, I can honestly say I see a big, positive difference. Buddy's coat is coming back, and his eyes, which were very dull and dry, have a light in them now that they didn't have. When I told my vet that I was supplementing my horse's feed with SmartPak MegaCell, he said, "Good idea!" Buddy loves the taste so I have only positive experiences with this product.
    Date published: 2014-03-20
    Rated 5 out of 5 by from Most affordable multi-vitamin/mineral supplement I have used this product for a couple of years now. All four of my horses like the taste (I don't feed grain so they take it straight from my hand/small feed tub). I like that it is such a comprehensive product as far as the number and quantity of each vitamin/mineral. It is also the most affordable supplement that I've found.
    Date published: 2014-02-18
    Rated 5 out of 5 by from Seems to make a difference! This product seems to be working. My horse's coat is already shinier (and it is the middle of the winter!) and he has only been on it for a little over a month. I appreciate that this product has selenium, magnesium, and vitamin E for a very reasonable price as I needed all three. The other ingredients were an added bonus! He also ate this plain so no problems there!
    Date published: 2014-01-27
    Rated 5 out of 5 by from Works well I have had my mare on this for almost 2 months now. I've noticed her coat looks even shinier, and she's feeling better than ever. People always complement me on how beautiful she looks. She absolutely loves the flavor. On 2 occasions she found her way into the SmartPak drawer (it's in front of her stall in a small hallway) and dumped them all into her stall trying to eat them all. Because the packaging is done so well, she didn't get them open LOL
    Date published: 2013-11-19
    Rated 4 out of 5 by from Good Value This is a good supplement for an easy keeper on pasture. Even Miss Picky chows it right down. Would be perfect if it had biotin added! Her coat is shiny and she carries good muscle. Overall, a good value.
    Date published: 2013-09-25
    Rated 5 out of 5 by from Good solid supplement this is just a good solid supplement in the vitamin category. I have three different horses needing different supplements but this is the one that I use for all three in my feeding program. It rounds out my ration just like I needed.
    Date published: 2013-09-03
    Rated 5 out of 5 by from Great for easy keepers I have an easy keeper who gets way less commercial pellets than the "recommended" amount. Adding this vitamin supplement ensures that his nutritional needs are covered.
    Date published: 2013-09-02
    Rated 4 out of 5 by from Great Purchase I like this product because it ensures my horse is getting all the required nutrients even though she is only on pasture with hay and occasionally receives some grain.
    Date published: 2013-08-14
    Rated 3 out of 5 by from Only one month in... We're only a month in and I haven't noticed a difference, yet. I am sure I will see the effects after a few months of use. These are the only reasons I have rated it as average. I will edit when/if I see a difference. The only positive information I can give is that my horse doesn't mind the taste. I just dump it in and he eats it! :)
    Date published: 2013-07-23
    Rated 5 out of 5 by from Our off the track guys have been on this for 2 months and we can already tell a difference. Especially our newest guy. On the track, the owners try to skimp and there really are no "frills" for the horses. In the two short months that we have had our newest horse on Mega Cell, he seems more alert and much more accepting of his new career as we go through the training steps to make him an eventer. Highly recommend this product.
    Date published: 2013-06-24
    Rated 5 out of 5 by from mega cell all three of my horses love mega cell for grass hay they will eat it without any grain even the picky horse loves it I bought it becauce my horses were a bit nervous and now they are calm and happy
    Date published: 2013-06-19
    Rated 5 out of 5 by from Great All Around Supplement My never-raced tb does well on a mainly forage based diet (hay/grass). I give her a small amount of crimped oats twice daily. My vet told me to add a vitamin/mineral supplement once daily to balance her diet. I chose Mega-Cell because of its great reviews and because of its price. I also prefer pellets over powders, and so does my horse. I have to say I am very pleased. My horse happily eats it and she is shiny; shed out nicely this Spring; has solid feet and is in all around great shape. I definitely see a difference as compared to when I didn't feed her a supplement.
    Date published: 2013-06-14
    Rated 5 out of 5 by from "Best tasting vitamins Ever" -Sierra Mare I wasted so much money trying to find a vitamin/mineral supplement that my picky horse would eat! Finally, here it is! I am very pleased with this product and most of the supplements that are "picky eater approved", my horse approves!
    Date published: 2013-05-17
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