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Magnesium 5,000

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Product Overview

Supports a healthy nervous system & muscles

This formula provides 5,000 mg of magnesium in tasty pellets that horses love!
  • Provides 5,000 mg of magnesium

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Key Ingredients


Supplement Facts

Ingredient Name Amount Per Serving
Ingredient Name Amount Per Pound

Ingredient Details


Weight Recommended Amount Loading Amount

How the Ingredients Work


Supporting Success

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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.

SmartPak customers are some of the most conscientious animal owners around. We encourage you to share your experience with the products we sell to help fellow customers to make informed choices for their animals. We do not edit these reviews in any way - they are direct customer-to-customer communication. We do monitor reviews for positive and negative feedback, and use this feedback to improve our selection as well as sharing feedback with product manufacturers to help them improve their products. Please note that we recommend consulting your vet with serious health issues.

Magnesium 5,000 is rated 4.6 out of 5 by 307.
Rated 4 out of 5 by from Simple Like the pellet, easy to feed, taste seems to be attractive to horses.
Date published: 2021-04-08
Rated 3 out of 5 by from Actually Did the Opposite of Intended Use I thought I would try magnesium for my OTTB that can be a bit tense. I've read that magnesium can help relaxing muscles particularly for horses who sweat a lot and get agitated while being groomed. In just two weeks of being on this, my gelding got excessively agitated and constipated. I found this odd, as they say the main thing you need to watch for with a magnesium supplement is loose stool. I've taken him off it and he's feeling much better. I will not be giving it to him again and if I consider magnesium in the future, I think I will try a liquid form.
Date published: 2021-02-19
Rated 5 out of 5 by from My horse loved it! My mare is a pretty picky eater but she loved this supplement! I have noticed a changed in her mood- she is definitely calmer and happier since starting.
Date published: 2020-12-07
Rated 4 out of 5 by from So far so good! My mare had been on this for 2 months now and I’m already seeing a difference. She is a super hot and pretty anxious horse naturally with this she is still energetic but it definitely takes the edge off. She’s less excitable and way more controllable. So far I’m happy with this product!
Date published: 2020-11-10
Rated 5 out of 5 by from we can trail ride again! I used to fox hunt in addition to show dressage when I first got my OTTB. As he gained weight and a top line he started rearing, bucking, spooking and displayed nervous energy. I had to stop trail riding all together and was still nervous for those naughty moments in the ring. After 1 week on magnesium I had my sweet boy back. He's low drama again and after 1 month we've even been venturing back out on the trail after 3 years! I have also noticed some improvement with an old muscle injury- weve made the transition from 1st level to second level because I trust him more and he is using himself. I'm a veterinarian and NEVER expected such results- intially I tried it to appease my trainer. Wow- she was right!
Date published: 2020-09-07
Rated 5 out of 5 by from Works!! I started my two horses on it a few weeks ago. Seems to be helping.
Date published: 2020-09-01
Rated 5 out of 5 by from Solved Horses Anxiety My horse is very anxious throughout the ride and while standing saddled up. Chews at the bit pretty consistently pulling it into his back molars. No dental issues. Straight anxiety. The magnesium SOLVED this problem. No more chewing and chopping. Stands quietly while getting groomed and when saddled. Did not help with the spookiness per say, but i am pleased it helped with the anxiety.
Date published: 2020-08-06
Rated 4 out of 5 by from More focus My horse has only been on this about a month but I'm starting to notice him being more focused when we're working.
Date published: 2020-07-28
Rated 3 out of 5 by from Nice Product This product helps just take the edge off. Horse eats it with no issues
Date published: 2020-07-16
Rated 5 out of 5 by from Amazing I got this for my mare when other calming supplements failed her. Since starting her on this she has a puppy dog personality. She remains calm when things are busy around her while riding. This is one thing I will never go without. Also thanks to Smartpaks, she always gets the right amount everyday and I dont have to worry about running out.
Date published: 2020-07-08
Rated 4 out of 5 by from Great coat I put my young mare in training on this and Vit E and her coat is beautiful and she is muscling well!
Date published: 2020-07-03
Rated 5 out of 5 by from Good choice This has really helped my horse, I am glad I purchased it.
Date published: 2020-06-27
Rated 5 out of 5 by from Works wonders! I have a 5yo ottb who has always been hot and a very forward ride. We tried a few calming supplements and none really worked. My picky eater doesn’t have any issues eating it and it has helped his demeanor tremendously and he will stay on it for the foreseeable future.
Date published: 2020-06-15
Rated 3 out of 5 by from Seems palatable Horse ate it ok. Unsure if it helped or not. Could have been just seasonal change.
Date published: 2020-06-09
Rated 5 out of 5 by from Super convenient So far, this product has exceeded my expectations.
Date published: 2020-02-11
Rated 5 out of 5 by from Magnesium These work great for my colt! I can't miss a day or he'll be crazy without it! Recently recommended to a friend for her horse and notice a change already!
Date published: 2020-01-13
Rated 1 out of 5 by from My horses refuse to eat it I really liked the idea of pelleted Magnesium, and at first, both of my horses seemed to like it well enough. Within a week, though, both have begun refusing any bucket of feed/supplement that includes this product. No surprise for my picky gelding, but even my mare, who is generally happy to eat whatever she's offered, turns up her nose at this stuff. Yesterday I tried offering both horses each element of their respective buckets separately, and this is the thing they object to. I can't comment on the efficacy of the supplement itself -- I assume it's perfectly fine if the horses actually swallow it.
Date published: 2020-01-13
Rated 5 out of 5 by from Glad I found this! After researching all of the supplements, I found that most are lacking in magnesium. This was the best brand with the best price.
Date published: 2019-12-05
Rated 3 out of 5 by from Good Product - Strong Smell I had my horse on Ultra Calm SmartPaks for a couple years. He's matured a lot & is 8 now so I took him off them and thought I would try the MVP Magnesium 5000 as a replacement...a much lower dose of magnesium. After using them for a couple days I noticed that he wouldn't touch his grain. We tried a couple things to get him to eat it but nothing worked. They have a rather strong smell so I'm guessing that's why he refused it. He's been very calm out on the trails so maybe he doesn't need a calming supplement now. I called your outstanding customer service dept. and they gave me a refund credit which I greatly appreciate. I'll continue to be a SmartPak customer in the future. Thank you!
Date published: 2019-10-23
Rated 5 out of 5 by from Easy to feed I bought this a month ago and can already see the difference in my mare
Date published: 2019-09-20
Rated 5 out of 5 by from Great Bought this for my TB with kidney problems who can't have much sugar in his diet. Has helped keep his magnesium levels good, and have definitely noticed a change in how much better he feels. He loves the taste as well! The only problem is I bought the 10 pound bag and found the bag's quality not to be great, had to move the supplement to a container.
Date published: 2019-09-19
Rated 5 out of 5 by from Palatable and affordable Best value for the money and my horse has no issues eating it. Definitely seems to help him!
Date published: 2019-09-18
Rated 4 out of 5 by from Different kind of Reaction I bought this for my hunter who struggles with anxiety, and my jumper who has a bit of a careful peek at the jumps. The hunter refused to eat it, and actually refused to eat anything for a few weeks after because he hated it so much (not a complete unusual reaction from him). It has a distinct smell I don't even particularly care for. The jumper eats is right up, but I wouldn't say its taken his peek away. I have seen a difference in his hair & hoof growth since he's been on this supplement. I'm on the fence about continuing with him since I don't think its actually improving his quietness level, but it's clearly helping his hair & hooves.
Date published: 2019-08-05
Rated 5 out of 5 by from Love this! Great product. My horse seems more relaxed almost instantly! When I ran out i was able to notice the true difference in my horses attitude. Just ordered more, so happy it helps and my horse ate it all up!
Date published: 2019-07-17
Rated 5 out of 5 by from I can tell a difference My horse has been on this supplement for about a month and I feel like I can already tell a difference in his demeanor. He’s much less anxious and it has made training much easier.
Date published: 2019-06-20
Rated 5 out of 5 by from I think it works I have a mare with very tight muscles. This seems to be making her more level headed and less reactive. I am ordering more!
Date published: 2019-06-06
Rated 5 out of 5 by from Mag 5000 Horse is so much more relaxed since starting this supplement....and he eats it !
Date published: 2019-05-30
Rated 5 out of 5 by from Great value My typically calm OTTB started to show some signs of stress and nervousness. I started him on this and I've seen a huge improvement- he's back to his calm, cool, collected self. Great value.
Date published: 2019-05-22
Rated 5 out of 5 by from My experienced endurance horse had been getting very difficult to handle the last couple of months-bucking, running through the bit, bolting. On a hunch I started her on a double dose of magnesium 10 days ago. For our ride today she was back to normal-14 miles alone trotting and cantering on a loose rein with only a single little spook in place. Magnesium won't fix crazy if a deficiency isn't the underlying problem, but this is an easy and effective diagnostic and solution.
Date published: 2019-03-20
Rated 5 out of 5 by from Great I started using these two months ago. They are very easy and my horse loves them.
Date published: 2019-02-28
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