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From: Price: $ $ $ $ $ $ $ $ $ ($/day) ($/day) $ $ $ ($/day) Member Price
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Shipping Frequency: AutoShips every 28 days (details) AutoShips every  days (details) One-time Ship
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    Cups:    ( Cups / Meal)
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Feeding Chart

Daily Serving

Dog Weight - lbs Inactive Dog Active Dog Working Dog
Inactive Dog - Less than 30 minutes of vigorous exercise daily
Active Dog - At least 30 minutes of vigorous exercise daily
Working Dog - More than two hours of vigorous exercise daily
This is only a guide. Please consult your veterinarian to determine the perfect feeding amount for your dog.
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Product Overview

Essential amino acids for protein production

Support your horse with essential amino acids!

Tri-Amino contains lysine, methionine, and threonine. These essential amino acids must be supplied in the diet, because horses cannot make them on their own. Lysine, methionine, and threonine are also limiting amino acids, meaning that if they are not present in adequate amounts, the body's ability to make protein can be limited.

Lysine aids in bone health and immune function.

Methionine is vital to the health of hooves, and the density of the mane and coat.

Threonine aids in normal immune and digestive functions, as well as supporting muscle mass.
  • Contains 10,000 mg of L-lysine, 5,000 mg of DL-methionine & 2,000 mg of L-threonine
  • These three amino acids must be provided in horses' diets because they can't make them on their own

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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.

Tri-Amino is rated 4.4 out of 5 by 212.
Rated 5 out of 5 by from Wow My horse was out of work for a bit and lost a lot of muscle during that period. Shortly before he was able to start working again, I decided to put him on Tri-Amino. All I can say is, Wow. The difference in how he looks/feels/moves is night and day. He is building and maintaining muscle so well. He's been on Tri-Amino for a little over two months, and it didn't take anywhere close to that long to start noticing a difference. Now -- I'm not saying this progress is entirely due to this supplement. He is in solid, consistent, slow-and-steady work. However, when I bought him a few years ago, he was also quite under-muscled, and the progress didn't come as quickly then as it has now with the addition of Tri-Amino into the equation. Especially at this price point, I have no plans to remove this supplement from his menu.
Date published: 2021-12-02
Rated 1 out of 5 by from Horses hated it Tried this from my farrier's recommendation to help my mare's hooves. None of my horses wanted to eat it. 2 out of 3 will eat anything and they didn't like it.
Date published: 2021-10-25
Rated 1 out of 5 by from Made my horse super hot Made my horse super hot and unbearable. Would not recommend. Horse did like the powder taste though
Date published: 2021-10-18
Rated 5 out of 5 by from Tri Amino I started Buck on this about a month ago. I just received my first auto ship. This is so easy and no worries about running out. My next purchase will be the hoof oil.
Date published: 2021-08-13
Rated 3 out of 5 by from Picky eater didn't like I have a 22 year old horse that has lost some of his top line with age. My Veterinarian recommended an increase in amino acids. I thought I would try this. Unfortunately my horse wouldn't eat it. He is a very pick eater. At first he tried to sift it to the bottom-then he just stopped eating his grain. I tried for over a month thinking he would get use to the taste-but it was a no go. Sadly I bought three containers and still have 1.5 left. That being said the other horses in the barn were always trying to stop at his feed tub to eat his left over grain and supplement. I gave it 3 stars because I think a non-picky eater would eat it just fine.
Date published: 2021-07-05
Rated 5 out of 5 by from Love this Have had my horse on this since I brought him home and it works great. Used as a part of his workout routine, he’s building his topline and filling out more. And it smells so good (at least he and I think so!)
Date published: 2020-11-03
Rated 5 out of 5 by from Adds muscle I bought this product for my OTTB who has a hard time maintaining a "filled out" look. After 2-3 weeks on this product, his butt, chest and neck have filled out noticeably! You won't notice a gradual change, but it seemed that just one day he magically looked beefier (he has not been in work and has just been a cute pasture ornament this whole time). He is still a little ribby so this product did not add overall weight like I was hoping but I am super please at how his muscles have filled out on this.
Date published: 2020-10-04
Rated 5 out of 5 by from Great product! My ottb needed quite a bit of help in the weight and muscle department after being diagnosed with Lyme disease...he faced a serious battle and had gone down hill fast. After his treatment I added this supplement and it has truly been a god send! Along with a high quality grain and hay...he is also on smartstride ultra, smart digest and vitamin e. The tri amino is also the best bang for your buck!
Date published: 2020-08-22
Rated 4 out of 5 by from Easy to feed and palatable I love the product and what it is doing for my horses, I just wish it came in a larger container. I am feeding it to 2 horses and go through the container quickly.
Date published: 2020-07-13
Rated 5 out of 5 by from Saw a big difference! I bought a pony as a resale project that was so skinny and had absolutely no muscle due to lack of work and improper nutrition! In addition to a well-balanced diet, I wanted to make sure to give her the proper building blocks to get her muscles built up properly! Adding this supplement made such a huge difference for her!
Date published: 2020-06-20
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