There is much info online to help you make a choice. It does come in gel capsules however the more potent delivery would be the pure oil in a veggie cap. The capsules would be diluted with a carrier oil.
here is a site I like to use to introduce people to oregano oil
be happy, be well,
an excerpt from their "how to use" page:
Taken internally, Oil of Oregano is highly effective against a wide range of yeast, fungi, bacteria, and candidiasis. It also kills internal parasites
and viruses. IT MUST BE PROPERLY DILUTED FIRST! Oil of Oregano is assimilated 10 times faster this way (as opposed to our Oregano Oil Gel Caps or Oregano Capsules, which assimilate via your digestive tract), though it WILL burn lightly and taste funny!
(a note here from Zoe...it is preferable to use a veggie cap which can be found easily at a good health food store or online. Here is a good source for NOW brand veggie caps http://www.bodybuilding.com/store/now/vcaps.html
just open one and drop a drop of pure oregano in)