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1
One time purchase
$38.00
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Description
Formula 707 MuscleMx combines four natural nutrients that work synergistically to encourage the metabolic reactions required for muscle growth and development. Lysine lays the foundation for the formation of muscle-building proteins. Gamma ...
Reviews
4.8
20 ratings
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Great results
I have tried a few different "name brand" weight gain products on this hard keeper and didn't realy see a difference in his overall body just a liitle more belly. I decided to try the 707 weight gain and saw that this Musclemx could be fed with it I tried them. Wow what a difference. I saw a change in him after just 3 weeks. His topline looks filled in more and weight thru out his whole body not just his belly. Will be getting another bag for him and will be putting my 19 yr old gelding on it also. Its great that i can also feed the Multi fly with the Weight Gain and MuscleMX.
C
Crazy · May 6, 2026
Hard Keeper
We have a hard keeper ottb that will lose weight at shows, even with extra feed. We started feeding this supplement about 3 weeks ago and are starting to see him fill in over his rump, behind the shoulder, and starting to build some muscle in his neck.
A
Ammie · April 28, 2026
Surprisingly better than expected
Very helpful for my full figured mare; we have tried thyroid meds, muzzles, 6 days a week consistent work she was always very round this supplement has really helped with her weight control