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MPCO, LLC (#10190)

One AC

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Feeding Chart

Daily Serving

Feeding Chart
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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Please call 1-800-461-8898 to order this product.
Only SmartPaks on AutoShip make you eligible to apply for the FREE ColiCare Program. Colicare is a free program that provides up to $15,000 in colic surgery reimbursement
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Product Overview

Support for non-sweaters

One AC powder is a supplement that was developed specifically for horses with performance-robbing anhidrosis (reduced ability to sweat). One AC has proven results from a field tests at the University of Florida. Contains ascorbic acid, niacin, and L-tyrosine..

Learn more about Anhidrosis 
  • Contains ascorbic acid, niacin & l-tyrosine
  • Proven in field tests at the University of Florida

Learn More

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

Supercharge Your Supplements

  • Simplify with SmartPaks | Consistent, Custom, Convenient
    We take the guesswork out of serving sizes, ensuring your horse gets the right amount, every time. SmartPaks have airtight seals to ensure that your horse always has the freshest supplements available. Your horse is unique and his supplements should be too. Choose from over 230 supplements to get everything he needs, nothing he doesn't. We print your horse's name on every Pak so there are no mix-ups, making feeding time fast, accurate and easy! Unlike most buckets, SmartPaks are made from recycled plastic and can be recycled again! We'll send your SmartPaks on time so you never run out, with total flexibility and no commitment. Plus all SmartPaks over $40 receive free ground shipping.


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.

One AC is rated 4.5 out of 5 by 232.
Rated 5 out of 5 by from Lifesaver for my mare. I have a mare who was almost completely anhydrotic. She would overheat just walking in our humid PA summers. Put her on this for a month and she started to sweat much better. Took her off, sweating stopped completely. Put her back on and she now sweats almost as much as she should. This has been a game changer for her. She will be on it from April-October every year for the rest of her lige.
Date published: 2023-07-16
Rated 1 out of 5 by from No Discernible Difference I am loathe to write a negative review, but I've seen no difference with this product. My horse developed anhidrosis a few years ago. Now each year, the first time the temps hit 99 degrees (we live in Texas), he stops sweating completely for the whole summer until temperatures come down consistently around October. His sire's FL career also ended early due to the same condition, and both I and his sire's owner have had no luck with this supplement. Summer is pretty much the off-season for us because he overheats so easily. I am trying another supplement this year, but I'm not holding my breath. For anyone else with a horse suffering from this condition, I hope this product works for you, but you're NOT crazy if you don't see a difference. It seems to work for some, unfortunately my guy is not one.
Date published: 2023-03-31
Rated 5 out of 5 by from Grrat Product [This review was collected as part of a promotion.] I've been using One AC for five central California summers. It has been a life saver for my gelding.
Date published: 2022-09-02
Rated 5 out of 5 by from Seems to help him with the heat in general I added One AC and redmond rock crushed salt and I am overall seeing my Friesian gelding tolerate the heat MUCH better. For the first time ever, he offered me a canter in a hot, humid 80 degree arena. It is worth noting that I also clipped him when I started using One AC. His coat wasn't exceptionally long, but long compared to the thoroughbreds around him. He was willing to canter again outside in the sun on a 75 degree day. I think this is a great addition to our heat tolerance strategy.
Date published: 2022-06-06
Rated 5 out of 5 by from Great product for the non sweating horse We have a black mare that stopped sweating one summer we tried everything... One ac was our last resort recommended by a friend. This product is wonderful it made the mare start sweating again. We used it during the summer & then she didn’t need it again until the next summer. We have be able to run her again & she sweats fine. Thanks one Ac for giving our mare back! I recommend this product to anyone who has a horse who don’t sweat..
Date published: 2021-06-24
Rated 5 out of 5 by from Works My non- sweater is sweating after about 10 days on One AC
Date published: 2021-06-05
Rated 5 out of 5 by from Works great Number one choice for horses with anhydrosis. Works great. Horse doesn’t much like the taste but will eat it soaked in with alfalfa cubes
Date published: 2021-05-16
Rated 5 out of 5 by from Sweaty Again in Central Florida My TB gelding had begun to exhibit partial anhydrosis and I was desperate to find a solution for him. He would sweat in small patches and it was not enough to cool him. His performance in lessons and shows was suffering. We are in Central Florida so it becomes hot and humid in May and the long summer runs through to nearly October! My trainer agreed with trying One AC but cautioned that it does not work for every anhydrotic horse. I began feeding two teaspoons a day, one at each feeding. It took about six weeks but we now have results that I attribute to the supplement. He is sweating more and becomes less winded during our riding sessions, even our Saturday morning lessons when it's especially humid and unbearable. Thank you Miracle Powder Company and Smartpak!
Date published: 2020-08-09
Rated 5 out of 5 by from It’s working for my mare! My mare overheated two days in a row - I started her on this product and she has not overheated since then.
Date published: 2020-07-13
Rated 1 out of 5 by from Deserves ZERO stars...but that's not an option I have tried this twice now. Once last year for 5 months and now again this year for 3+ months. I have been so desperate for a solution that I took a couple people's recommendation and tried this...twice. I also did not give up after a couple months because of the advice that it can take a few months to work...ummm, NO! Moving on to acupuncture and Chinese herbs; told you I am desperate!!! Regardless, this product did NOTHING and was a waste of money.
Date published: 2020-07-13
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