To further muddy the waters, there was also a study that showed that testosterone levels were actually increased with megadoses (438 mg/day) of Vitamin E.  However, this study had no control. Plus,. I would urge caution at megadosing alpha-tocopherol, because yet another study showed a decrease in thyroid hormones with megadosing.  One study even showed a slight risk in lung cancer for those taking Vitamin E. 
This is definitely a great article on how to naturally raise your testosterone levels, but there are a couple of points I would like to add.
1) Zinc will also help to raise testosterone levels but should be taken with calcium. If you supplement with either of these minerals, be sure to take the other as well because they are crucial to one another’s function inside the body.
2) DHEA is another good supplement that can boost testosterone levels. You do not want to take too much DHEA though because it can actually convert to estrogen inside the body.
3) If you are experiencing the signs or symptoms of Low T, you should consider taking a look at your medicine cabinet. Many popular medicines have been known to lower testosterone levels or give off Low T like symptoms such as .