
Adding extra Vitamin E to our endurance horses feed ration on a daily basis can be really helpful. Especially for those horse that are working consistently and do not live on pasture.
I’ve always used the 400 I.E. gel caps that I get in a big jar from Costco. I’ve been doing this for years and years…originally based upon the original recommendations by Susan Garlinghouse after I heard one of her lectures. Since then there have been a lot of articles published on the topic, all indicating that supplementing extra Vitamin E for our working horses can be of a real benefit to them.
COUPON ALERT: For those of you that shop at Costco – from now until June 6, 2010 they have a $5 off coupon on a bottle of 500 capsules, with a 10 item limit. I bought a few bottles, since they don’t expire until October 2013. This makes it a very good deal. If for example, you wanted to supplement one horse with 5 capsules of 400 i.e. Vitamin E per day (an additional 2000 i.e.) then it would work out to costing you a little under $3 per month. These Vitamin E caps from Kirkland (Costco) have verified ingredients from uspverified.org. They also contain no artificial colors, flavors, preservatives and no yeast, starch or gluten. The Vitamin E ingredients are: dl-Alpha Tocopheryl Acetate, Geletin, Glycerin and Water.
In between rides this is what my horses are fed:
- Hay
- Mega Dose Vitamins (1 cup)
- Handful of 400 I.E. Vitamin E gel caps
- Free choice loose salt
That’s it. They don’t even get beet pulp unless I’m getting them ready to trailer on a trip. I use beet pulp along with a cup of complete feed (or now, the low carb feeds) to get some additional salt into them. That way they arrive at the ride well hydrated. This seems to work really well. My horses maintain good weight and are very healthy. I am usually limiting the amount of hay they get because they are all such easy keepers.
If you haven’t heard about the benefits of adding Vitamin E to your horse’s diet, click here to read a report from Kentucky Equine Research.
Here is an excerpt from the article: “So how much vitamin E is needed?
Recent research indicates that the vitamin E requirement of horses is much higher than was thought 10 years ago.
Table 1 indicates the Kentucky Equine Research recommendations for vitamin E in IU per day for a 550 kg horse in various intensities of work. For hard-working and athletic horses which may be prone to “tying-up” there is a definite benefit from vitamin E and selenium supplementation. These antioxidants can reduce the severity of exercise-induced free radical damage to muscle cells. In a small percentage of horses that tie-up, supplementation of vitamin E and selenium alone will alleviate the problem.
Recent research at the University of Kentucky has indicated that the requirement may be higher than the levels in Table 1 in horses exercised daily for a prolonged period of time. In the study horses were trained for 3 months and vitamin E supplementation of 80 IU/kg diet (800 IU/day) did not maintain blood and muscle vitamin E levels whereas 300 IU/kg diet (3000 IU/day) did maintain levels. A basal diet containing less than 40 IU/kg diet (400 IU/day) also failed to maintain blood or tissue levels of the vitamin. However, vitamin E supplementation did not change specific indicators of muscle integrity or damage in an exercise test at the end of the training period. More research needs to be done, but it would not be surprising if recommendations for vitamin E intake were increased in the near future, particularly for prolonged duration exercise.
Vitamin E is important for your horse’s health but it is also an expensive supplement. Therefore, it is important not to overuse the vitamin. However, if vitamin E can lead to improved immune and muscle function, better performance and a happier horse, the benefits will outweigh the costs.”
Photos of Chief and Bo taken the afternoon of 5/23/2010. Play time!






Thank you so much for this very timely article as I was just about to go BUY a very expensive Vitamin E supplement for my horse. This makes it so much easier!
You have poasted some great advice just as I was doing reasearch on that particular subject. Love that! The insect bite one was really timely as well as it is becoming buggy season here in the PNW.
Thanks again!
Jocelyn and Star
yup.. i’ve fond vitamin e to be good for us’ns and them both
thanx for posting this
gp
Wow! What great info you are bring our attention to. I read the nutrient label on the Mega Dose vits you feed and it looks like your horse would get 5,000IU of Vit. E everyday. Plus, you said you feed another handful of Vit. E capsules at 400IU per capsule. Have you determined just how many IU’s of Vit. E you think you need to give your horse(s) everyday? And, do you up that amount when at endurance rides? Also, I noticed that Mega Dose vits do not have a variety of amino acids. Is that something you address through other feeds (grass)? Keep the info coming!
Hi Jan – actually I should have said one dose rather than one cup on the Megadose, because I’m using their “cup”. I know I’m giving them more Vitamin E, but that’s okay – it takes something like 37,000 I.E. to overdose them a day so I’m not even close. There is Lysine in MegaDose. I do try to let the horses graze on grass whenever I can. It has been tough this last year with Chief’s health issues/injury but I am starting to let him back in the pasture a little here and there, during the safest times to graze.
Doe your horses eat the gel caps just plain? Or, do you have to do something to them? I have one that is kind of picky about things so I’m concerned he might not eat them.
Hi Sue – yes, the horses eat them no problem. Every so often they might drop one, but usually they all get consumed. I’ve been putting them in with their daily dose of pelleted vitamins, and that seems to work. You could probably get your horse to eat them with just a handful of some sort of feed. Good luck! Karen
Hello, I stumbled across your blog through Yahoo and just wanted to say that I love it. I’ll definitely be bookmarking it!
I’ve been using the same Vit E capsules, in addition to Millenium Gold, which brings daily Vit E to around 15K IU, for about two months now and have noticed a dramatic decrease in horses overall body soreness and his loins don’t tie up like they used to.
That’s great! It’s great to hear about stuff working well for others (or rather, for their horses).
Has anyone here tried Photonic Therapy. It is a form of acupuncture that uses red light rather than needles. An Australian vet has developed it and there are many people who say it is amazing. Interested in thoughts from people who have used it in horses.
This blog is great!! And i always wanted to have an endurance horse