Skip to content
PLEASE NOTE: You may experience errors on our site when using Internet Explorer. Please consider updating your browser, or download Google Chrome.
MPCO, LLC (#10190)

One AC

From: Price: $ $ $ $ $ $ $ $ $ $/day $/day $ $ $ $/day Member Price
(AutoShip discount will be reflected in your cart)
Packaging Options:
Shipping Frequency: AutoShips every 28 days (details) AutoShips every  days (details) One-time Ship
You'll love our AutoShip because it's:
  • Focused on healthy s, because consistency is key
  • Easy to snooze or cancel online, anytime
  • Totally flexible - edit your order as often as you'd like
  • Your VIP pass to FREE SmartPerks benefits
PLUS! You'll save % on every shipment if you order this product on AutoShip PLUS! You'll save % on every shipment if you order this product on AutoShip
The frequency you selected is not eligible for SmartPerks benefits that come with AutoShip supplement orders. In order to get benefits like free shipping and 10% off, set this product to ship at least every days. What are SmartPerks?
These are for:
    Cups:    ( Cups / Meal)
Change Dose
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.
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
  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
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
Colicare Eligible
Great Choice! You'll be eligible to apply for our FREE ColiCare Program, that provides up to $15,000 in colic surgery reimbursement, after checkout.
New ship same day!
Order within and have it by Shipping to
Add these items to your cart to get your estimated arrival date. Shipping to
Lowest Price Guaranteed
We're bringing you this product at the lowest price allowed by the manufacturer so you won't find it cheaper anywhere else. This also means we can't apply any further discounts or promotions.
We're sorry this item is currently out of stock. Our team is working to get it back in stock asap.

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 Helps my 7 y o OTTB to sweat. Live in South Florida so absolutely necessary. My boy has mild to moderate anhidrosis.
Date published: 2020-05-11
Rated 3 out of 5 by from Depends on the horse [This review was collected as part of a promotion.] I’ve used this on a 30+yr old with 0 results and on a 15yr old with some results, varies horse to horse
Date published: 2019-12-18
Rated 5 out of 5 by from LIFE SAVER!!!! I bought OneAC for my Thoroughbred Swagger, who was recently diagnosed with Anhidrosis. I was so devastated with the diagnosis and was extremely worried about my beloved Swagger. It is mid-October and Swagger has been on OneAC almost two months. I can tell you that Swagger is feeling better and has started to sweat in his neck area. I AM SO EXCITED! Upon further research, I JUST ordered CoolStance feed from SmartPak, which is a cool, clean feed that has MANY great reviews. I will keep you all posted on Swaggers journey, I eagerly await the arrival of CoolStance. My experience with OneAC and the lovely ladies at SmartPak has been FIRST CLASS! Really, I have leaned on SmartPak’s team so much the last two months, sometimes calling multiple times a week for guidance. Thank you SmartPak team for all you do! Your dedication has meant so much to me during this TRULY emotional journey with Swagger! Thank you again!
Date published: 2019-10-17
Rated 5 out of 5 by from It works! My OTTB showed a few signs of anhidrosis and my vet recommended One AC. He has been sweating great and is back in competition.
Date published: 2019-09-11
Rated 4 out of 5 by from Helps in the heat! I have a 28-year-old Cushing’s horse. A warmblood with a thick coat that has been managing his ACTH levels with Prascend but still had difficulty cooling off in the heat. Consistent body clipping and adding One AC to his AM and PM buckets has helped him manage through the North Carolina heat and humidity much more comfortably. Will start it sooner in the spring and keep him on it thru early fall next year.
Date published: 2019-09-07
Rated 5 out of 5 by from My horse is wet with sweat!!! This was recommended by my vet after my horse developed anhydrosis last July, so A.I. have now used this for a year. Three key points to improve your outcome: 1. OneAC definitely works best if you put your horse on it for several weeks before it gets hot (I started in early Spring this year). 2. I pair it with either table salt or electrolytes daily (vets recommendation) 3. My horse is a large 1800lb draft cross who needed much higher dose than we thought- 4.5scoops twice a day (again, this dose was increased slowly under vet supervision but needs to be this high to work). Awesome product! Please sell it in a larger container!
Date published: 2019-07-30
Rated 4 out of 5 by from Wonderful Result Did exactly what it says it will. Horse has been on it a week, and he already has a better sweat pattern and is less lethargic
Date published: 2019-07-11
Rated 5 out of 5 by from Typical great srevice from SmartPak My sweet Kate is a senior Belgian heavy draft mule. During recent sudden heat wave found her breathing heavily, not sweating. Phone call to SmartPak got 1AC shipped next day. She hates the taste, but takes it soaked with alfalfa cubes. Sweating appropriately now.
Date published: 2019-06-05
Rated 5 out of 5 by from Amazing for non sweaters [This review was collected as part of a promotion.] I bought this for a horse that doesn’t sweat and overheats during the day. It’s made a big difference in her overall comfort. Great price!
Date published: 2018-11-01
Rated 5 out of 5 by from So glad this was recommended by our vet for our COPD horse. We were so worried about her breathing and never took into consideration of her not sweating out bad toxins as well. Tried other sweating aid supplements without working. Along with sweet Olive not wanting to eat with the other supplements in her grain. The One A.C. is palatable and has made a difference in our mares health as Well! Very pleased with it! And of course with our other products from SmartPak.
Date published: 2018-10-06
Rated 4 out of 5 by from one ac i have used one ac for the last couple of months . The horse began swetting after about six weeks. How long should i continue to use this product?
Date published: 2018-09-26
Rated 5 out of 5 by from Great Product! I was so upset when my horse STOPPED SWEATING. My trainer recommended starting him on One AC immediately. I followed the label instructions for the first week, but still no sweating. Then after reading posts from the Support for Horses with Anhidrosis that the a loading dosage of double or even triple would get them sweating, I tried a double dose. He started sweating within four days. After 14 days I ramped down to three scoops, then down to maintenance dose 30 days after that in his regular SmartPak. I plan to leave him on the One AC through the end of October when it should be cool enough to discontinue until late in April. Plan to restart the One AC before the warm weather starts. Adding the One AC was economical and made it easy to be sure he receives his "meds" every day, regardless of who is doing the feeding at my boarding stable or when he's at the trainer's.
Date published: 2018-08-24
Rated 5 out of 5 by from Amazing! Bought this for a new horse that started struggling in the heat and was not sweating as much as I thought he should. My vet recommended I give this a try. Within days I noticed a difference and within 2 weeks he was a different horse. We will not go a summer season without this!
Date published: 2018-08-21
Rated 1 out of 5 by from No results My horse has been on this product for a month now and have not seen any results yet
Date published: 2018-08-13
Rated 4 out of 5 by from May be working She has been on this supplement for one month and she may be starting to sweat more. It is not dramatic and am hoping to see more with longer time on it. Easy to feed since it is a tiny amount of powder needed and doesn’t have any objectionable flavor.
Date published: 2018-08-10
Rated 5 out of 5 by from Works.... My main rope horse suffers from the heat to the point of colic when the temps get high. I started her on One AC this spring and had no episodes this summer and it has been very hot! She sweats more easily when working and just seems more comfortable overall. Thank you for a cost effective supplement that works.
Date published: 2018-07-20
Rated 5 out of 5 by from Helps our horses sweat We have several horses on this supplement. We feel it helps them overcome their anhydrosis. It is palatable and I would recommend it if your horse has a hard time breaking a sweat.
Date published: 2018-06-30
Rated 5 out of 5 by from Works for my gelding I buy this every year and give it to my gelding with anhydrosis. I give it from May through September and he hasn't had any problems with not sweating. It's a great product.
Date published: 2018-01-13
Rated 5 out of 5 by from Effective I have used One AC on our thoroughbred in Florida for several years with great success. Highly recommend to anyone who owns a horse with anhidrosis.
Date published: 2017-09-04
Rated 4 out of 5 by from It started helping my horse after 2 weeks he started sweating and also almost completely shed his winter coat.
Date published: 2017-08-17
Rated 1 out of 5 by from Didn't work for our Thoroughbred Tried this for a few months because our horse is not sweating properly. We also tried giving him stout beer for a few months and that has not worked well either so the product may be fine. It may just be that we have a difficult horse to figure out.
Date published: 2017-08-17
Rated 4 out of 5 by from It was helpful My gelding went from a heavy sweater to a non sweater in a week of high temps. This product works really well when I give him about two extra scoops (reason for four stars instead of five). It also works best when it's slightly humid out.
Date published: 2017-08-08
Rated 5 out of 5 by from Works on Our Friesians! We've been using One AC on a few of our Friesian horses for many years. Typically March through October. Always positive results. Very satisfied
Date published: 2017-07-28
Rated 5 out of 5 by from It works! This has worked on 2 of my warmblood geldings. Time frame for it to kick in is pretty accurate. Sweating starts sporaticly at first.
Date published: 2017-07-14
Rated 3 out of 5 by from It helps my horse ever so slightly giving 2 x daily. I hate giving it a star rating because I think every horse could respond differently, so I did give just 3 , but for my particular horse only.
Date published: 2017-06-24
Rated 3 out of 5 by from No difference I added this to my horse's smartpak's for the last two months. I have not noticed any improvement in his ability to sweat.
Date published: 2017-06-19
Rated 5 out of 5 by from Keeps my mare sweating in the Texas heat Last year I thought I might be able to go without this as my mare seemed to be doing really well on the sweating front. I realized my mistake when she completely shut down right after it started getting hot. This year I'm not taking any chances and have had her on it since early spring. So far so good. She sweats more than my other horses even on 90 degree, 90% humidity days.
Date published: 2017-06-14
Rated 5 out of 5 by from It Does Work Like magic We have used One AC to create sweat in our geriatric mare who suffers from severe anhydrosis. Our experience is that, for best results, administration should be either year-round or well in advance of weather warm enough to create sweat, depending on climate and animal activity. It does take 3 to 4 weeks for results to be seen, so a little patience goes a long way.
Date published: 2017-05-23
Rated 5 out of 5 by from Good for anhydrotic horses I add these OneAC to our spring/summer/fall feeding routing to help us through the hot weather and heavy work of summer training and show season. My gelding suffers from anhydrosis and starting him in the Spring on OneAC helps him to sweat throughout the hot and steamy weather. He's big - so we've switched to the SmartPak option rather than the bulk (which we used for two years) for ease and clean up. He's always excited about his meals and adding this powder doesn't deter him one bit. OnceAC in combo with our summer routine really help us through the hot and steamy weather.
Date published: 2017-05-17
Rated 5 out of 5 by from One AC saved our show season! After a week of the Oklahoma summer heat, my daughter's gelding stopped sweating and began puffing hard when worked. We started him on One AC and within a few weeks he was back in the show pen and doing great! Such a terrific product!
Date published: 2016-10-11
  • y_2024, m_4, d_21, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.41
  • cp_2, bvpage2n
  • co_hasreviews, tv_24, tr_208
  • loc_en_US, sid_190, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_smartpak
  • bvseo_sdk, net_sdk,
  • CLOUD, getContent, 78ms


Recently Viewed View all

WARNING: Cancer and Reproductive Harm -