Natural is probably better than synthetic, mixed tocopherols are probably better than just D Alpha Tocopherol, including tocotrienols is probably better than not.
I like Now Foods, Gamma E Complex, Advanced, 120 Softgels - iHerb.com
. I like iHerb, too... excellent selection, wonderful prices, fast shipping, most everything always in stock. If you have never ordered from them, you can put MAZ355 in the coupon code box and get $5 off your first order only. As a disclaimer, I get a tiny perk if someone does this... because I have been very happy with them, I have been recommending this company for years before they introduced this program.