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MPCO, LLC (#10190)

One AC

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Inactive Dog - Less than 30 minutes of vigorous exercise daily
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Working Dog - More than two hours of vigorous exercise daily
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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

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Key Ingredients


Supplement Facts

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Ingredient Name Amount Per Pound

Ingredient Details


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How the Ingredients Work

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    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 Excellent supplement. I bought this supplement to help my horse with a temporary bout of anhydrosis, and it seemed to help him a lot.
Date published: 2016-10-04
Rated 5 out of 5 by from We aquired a mare recently that was on this suppliment - She does well on it and it is easy to use.
Date published: 2016-09-28
Rated 1 out of 5 by from Didn't work. After 1 month of using One AC, my horse still isn't sweating enough.
Date published: 2016-09-02
Rated 5 out of 5 by from Don't give up on this! It took about four weeks for this to start kicking in for my 14 year old gelding. I was worried that it wasn't working at all, and then one day, suddenly, he was sweating! It's been six weeks now, and he's back to his old, perky self, sweating normally and feeling 100% again, even in our humid, triple-digit Houston heat. So if you don't see results in two or three weeks, don't give up. I guess it just takes a little longer to work for some horses. Also, my guy is a SUPER picky eater. He is suspicious of everything, and will flat out refuse to swallow a lot of things no matter how hard you try to disguise them. But he eats this powder on his grain with no problem at all!
Date published: 2016-08-30
Rated 5 out of 5 by from Excellent service and great price follow up was good good to know that their are people who still care in this world
Date published: 2016-08-25
Rated 5 out of 5 by from FINALLY we have sweating!! I have a Friesian mare that I purchased last December. This was our first summer together and I was not prepared. She has a stifle issue and has to stay in consistent work, but as the weather got warmer, my mare stopped sweating, was overheating, and couldn't endure more than a 15 min ride even in the early morning or evenings. I live on the Gulf Coast and the heat and humidity can be brutal. I almost gave up on the One AC after 6 weeks and only getting a little sweat under the saddle pad and girth. I started looking into other options and was ready to call Smartpak asking for a refund. This past weekend made 7 weeks and FINALLY we have SWEAT! Had an early morning lesson and by the end of it, my mare was drenched on her neck and chest areas. I couldn't believe it. I purchased the Smartlytes along with the One AC to help increase her water intake and she is finally able to to go a full 45 minute ride without overheating. I guess depending on the horse, it can take awhile to kick in, but it was definitely worth it. FYI...she is on the Smartpak 2 scoops per day ration. It's possible that if I had upped the dosage, it may have kicked in sooner, but I am just glad to see results!
Date published: 2016-08-22
Rated 5 out of 5 by from One AC is great! I have given my horse Nate One AC for just a few weeks and already noticed a difference. He is sweating more and drinking more. Nate is enjoying his first Texas summer after residing in Michigian and Canada previously. I was concerned about the transition, and One AC has truly helped!
Date published: 2016-08-20
Rated 1 out of 5 by from Does Not Work Every horse is different, and One AC was started in March, 2016. I give 3 1/2 scoops twice a day to my 1400 pound horse. We are now heading into August, and my horse only sweats under the saddle and girth. He gets beer, extra salt and daily supplements. I just started on Perspercide, but no luck yet. I did the Equiwinner patches for 10 days and those did not help. Not sure what to do next. Maybe I'll try Refresh by Platinum. I wish everyone the best with anhidrosis and this awful summer heat in Florida.
Date published: 2016-07-27
Rated 5 out of 5 by from great product easy to use I have had my 24 year old palimino quarter horse gelding on One AC for 2 years . He had an non sweating attack... no sweating and high temp and breathing rate. had to rinse and scrape multiple times . vet suggested One AC and I have used it now for two summers and no issues since. and this summer is HOT.
Date published: 2016-07-22
Rated 1 out of 5 by from Didn't work I used the supplement for a couple months it worked great and then when the Florida summer heat started it stopped working.
Date published: 2016-06-16
Rated 5 out of 5 by from Sand Clear/Manure-Eating Dogs-Hurrah! I have used Sand Clear monthly packets for years but, I never dreamed they would be so good at cleaning the sand out of the gut of my horses. Unfortunately, my Australian Shepherd dog, as well as my 2 Teddy Bear Puppy-type dogs, are always getting into the manure pile in their quest for horse droppings (treats for them). I was alarmed when the Aussie vomited in the house repeatedly one morning. The final vomitus produced a cupful of sand with mucus. I thought how awful it was for the dog to have that much sand in her stomach.I called the Vet, thinking something was very wrong. But, we both decided that it was a natural occurrence, after the Aussie's dining habits were exposed. I realized that the Sand Clear was doing it's job. The sand absorption by the Sand Clear was so good that my dog became filled with sand after dining on her special manure diet. All was well with my dogs and horses. I am now working on an underground fence to keep the manure piles off-bounds for the dogs.
Date published: 2016-06-01
Rated 5 out of 5 by from Sweating again! My 27 year old TB stopped sweating last summer and about gave me a heart attack. I started him on One AC and noticed him starting to sweat within a week! Thank you for giving me my sweaty boy back!
Date published: 2016-04-24
Rated 5 out of 5 by from A Must Have! My colt developed Anhidrosis last summer. I tried several products and One AC seemed to make the biggest difference in his sweating. I have continued this product since, and he has been sweating normally since.
Date published: 2016-04-06
Rated 5 out of 5 by from One AC Been very beneficial and I plan to keep Pistol on it.
Date published: 2016-01-19
Rated 5 out of 5 by from Consistently a quality supplement My horse intermittently has issues with not sweating. Keep him on One AC, problem solved!
Date published: 2015-12-12
Rated 5 out of 5 by from Ok A little to soon to tell yet. And of course since the Temps have dropped off sweating wouldn't be as big a issue. But the folks at Smart Pack have been great about working with us. As you can see Summer's more than a show horse. She's my baby & I wouldn't trust just anyone . Thank You Smart Pack for helping us .
Date published: 2015-10-20
Rated 1 out of 5 by from Has not helped my non sweater at all, moving on to try something else
Date published: 2015-09-30
Rated 5 out of 5 by from Great product that actually works I purchased this product about 5 weeks ago and have to say I'm thoroughly impressed with it. Living in Alabama the summers here are painfully hot. We have only had our horse since March but in the short time we have had him I noticed that he would never sweat after being ridden by my daughter when he should of been sweating with the amount of jumping she was doing. I researched causes and came up with anhidrosis . I decided to try this product . It took about 3 weeks to kick in but we finally have sweat. He is now sweating at a pace that he should be. He seems a lot happier now he is able to sweat. I'm really happy with this product . It has worked for us and isn't painfully expensive. I bought the smartpaks as we board and thought it would be easier all around .
Date published: 2015-09-10
Rated 5 out of 5 by from This works I have used this product during the hot weather months for two years with good results. I would recommend this product for any horse suffering from anhidrosis.
Date published: 2015-08-13
Rated 5 out of 5 by from Worked rather quickly My 26 year old gelding developed anhidrosis in his second summer in South Carolina. This summer has been hotter and more humid than the previous summer. My vet recommended trying One AC. I started him on the One AC. After about 7 days he popped a little sweat. It is sweltering today and he is sweating in all the right places, 10 days on One AC.
Date published: 2015-07-11
Rated 5 out of 5 by from Miracle Supplement Last summer our quarter horse gelding was diagnosed with anhidrosis and had a really rough time until he was put on One AC. This spring we started him on it as soon as it got warm and he has had zero issues and has been ridden all summer! He sweats like a champ now. Very pleased with One AC.
Date published: 2015-07-07
Rated 5 out of 5 by from This worked well for my welsh cob My 6 yo welsh cob developed anhydrosis and I worried how to keep her in work through the summer. Within a week of starting OneAC she began to show sweat under her saddle. We've been using it for almost 2 months and she's sweating almost normally. I'm very pleased with the product.
Date published: 2015-06-12
Rated 5 out of 5 by from Great This product saved my horses life!!! No other product was working and we thought we would loose him!
Date published: 2015-05-05
Rated 5 out of 5 by from Excellent product My 28 year young Arabian mare began having difficulty with anhydrosis last year. Her veterinarian put her on One AC. So far it has worked very well. Very nice that it can be ordered directly without a prescription.
Date published: 2015-04-03
Rated 5 out of 5 by from Worked for anhydrosis My older gelding came to me with a total lack of ability to sweat--dry under the saddle blankets. That was an alarm bell to me. I bought this and gave it to him in his supplements for a few weeks and noticed a big improvement -- he started sweating under his saddle pad and on his neck during workouts. He had lived in cold Wyoming and then was bought by owners in the hot desert before me and it shocked his system. I made sure he got a lot of care, plenty of drinking water and salt/minerals, and veterinary support to help him adapt to the heat. He is a great horse and now is fully back to normal and fit, this supplement worked for him.
Date published: 2015-03-27
Rated 5 out of 5 by from It really works We bought One AC for our horse that does not sweat. He is a coming 5 year old Gypsy Vanner and has a condition called anihydrosis. He started seating within the first week and now gets a daily does.
Date published: 2015-02-09
Rated 5 out of 5 by from Great product Works great on my non sweater and my horse eats it very well
Date published: 2014-12-08
Rated 5 out of 5 by from Great Product! It Works! I use this product on my anhydrosis mini...April through October. It gets hot in AZ during the summer and this allows my mini to sweat during the hottest months. I also use this on my IR?Cushings horse who has periods of no sweating. Price is lower than local stores.
Date published: 2014-11-18
Rated 5 out of 5 by from Works gret for my OTTB I bought this for my mare who doesn't sweat. Works instantly :)
Date published: 2014-11-18
Rated 1 out of 5 by from Sadly disappointing My horse is on a complete coverage regimen with smartpak and I am generally a huge advocate. However, I can't recommend this supplement. My mare suddenly became an "inefficient sweater", meaning slow to sweat and only on her neck. I was hoping for any improvement at all in helping her sweat over more of her body more quickly. I've seen absolutely no change in sweating. I even doubled the dose for a month to see if that would help; it did not. I consider this a total waste of my money. That being said, I would pay double if it actually worked, but it did not.
Date published: 2014-09-29
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