What is your favorite Vitamin E supplement? 

MegaSel. Its chelated Vit E and Selenium. It a liquid and it is absorbed fast. 

Elevate WS from Kentucky Performance Products.

https://kppusa.com/product/elevate-w-s/

For people or horses? 

I get this from Valley Vet,

I use MVP Natural Vitamin E 

Can I ask why would one need to supplement vitamin E?  Is there a specific benefit or is it just for an overall wellness type of supplement? 

Helps with muscle soreness.

We use a Vitamin E and Selenium pellet from this company https://www.su-perstore.com

Vitamin E is essential for horses who've been treated for EPM to help avoid relapse also. 

Also excellent immune support for senior horses and horses undergoing stress, like hauling. It's the antioxidant their bodies need most. Also great tool for horses with weak/loose stifles, helps the muscles support it more. First thing my vet rcommended when we diagnosed my mare with weak stifles. I have since put all of mine on it. Natural Vitamin E is also much better than synthetic, the bioavailability is so much higher 

But do you also need the Selemium that comes with most of the Vitamin E supplements?

Depends on where you live, and how much is provided by your forage & feed. I live in IL, it's recommended here 

I did not know that about the weak/loose stifles! Learn something new every day! 

Excel EQ.  Natural vitamin E.  

Elevate Concentrate, not maintenance powder. I like the one that is 5000 iu per scoop. Actually, I prefer the Elevate liquid first and then transition to the powder after a month on the liquid, if I am truly trying to supplement vitamin E for a deficiency or myopathy. 

I have been using the maintenance for a long time but someone told me I need to use the concentrate to save a little money so I did, got the concentrated in the other day, same ingredients same size container, but the only different is the scoops and price, LOL, the scoop in the concentrate is bigger then the maintenance and alot more money.. So I'll just stay with the manintenance next time

Vitamin E is an interesting topic. The largest producer of natural vitamin E is ADM. Most of the products that advertise "natural" E are getting it from that source. As far as I know, all vitamin E on the market in supplement form is Tocopherol, in either synthetic or natural form. It has been pretty well  established that Natural Vitamin E forms are better utilized. The other option to Tocopherol would be natural sources of Tocotrienols. There are four of these vitamin E forms. They naturally occure in Rice bran, only that has been properly stabilized, wheat germ oil, and a few other natural vegetable oils. It is believed that these forms of vitamin E are much more potent antioxidents than Tocopherol. Vitamin E, in any form is fragile. Processing with excessive heat for extended periods of time effects Vitamin E levels in all supplements and feeds. Consideration of this by the feed or supplement manufacturer is critical to maintaining naturally occuring vitamin E levels in the finished product. Stabilized Rice Bran contains both types of Vitamin E. 

So Win, if you already feed the stabilized rice bran then you don't really need to supplement with a Vitamin E?  

I would give that a qualified “yes”, you can leave out additional vit E to most horses if they are getting properly stabilized Rice Bran in the normally fed rates. I may provide a natural source E to PSSM horses, IR horses and EPM horses if their condition is poor, though that is really for a vet to decide. For normally healthy horses, I would not add more E. There can be a vast difference in the processing of “stabilized” Rice Bran. The ones that I would trust to use truly stable Rice Bran are as follows. 

Renew Gold ( of course ), MaxE Glo and Natural Glo for sure. Some Purina products use properly stabilized Rice Bran as an ingredient, but then mix it with soy bean meal or wheat mids and other products that I will not use. I am sure that there are others, but I have no information on how they stabilize, so can’t comment there.  Raw Rice Bran or improperly stabilized Rice Bran will have literally no vitamin E as it is consumed by rancidity in a matter of days or even hours.