Select the "Shop for Products" tab to find the oils you need. Not all oils are safe for internal consumption, and some blends are specifically made for topical use. doTERRA makes it easy to identify: Every oil that can be taken internally has a "Supplement Facts" box on the bottle, the same that you find on any food item. If the box is not there, it is not meant for internal use.
While UNDA is a well known brand and many doctors recommend them, they are combinations of herbs and minerals and must be prescribed by a professional trained in administering them. doTERRA essential oils are the distilled compounds from the plant that have medicinal benefit and with a little time spent educating yourself, you can learn to use them for your personal health needs. Here is a good website that can help you in that endeavor: http://www.neweverythingessential.me