What brand name is it ? Some manufacturers use chemicals (solvents) to make expeller pressed coconut oil. The way I understand it, is that ALL expeller pressed coconut oil will be pretty tasteless. There is so much information on the internet about coconut oil that it gets confusing. Some ways of extracting the oil from coconuts involves high temperatures. I had some that and it burns my throat when I swallow it. Needless to say that one is only going on my hair ! *LOL*
Some of the manufacturers use copra, which is dried coconut meat. This one is always RBD, which means refined, bleached and deoderized. I think I have had some of this kind too and it was total junk.
If it was me using coconut oil to try and get my thyroid working right I would use virgin coconut oil. A good quality kind.
People actually lose weight eating coconut oil. I believe that the reasoning behind that is that the coconut oil decreases the appetite. It is also said to speed up the metabolism.
Mercola recommends Tropical Traditions Virgin Coconut Oil. Here is a link to what he has to say about it.