Essene bread is a beneficial food for O type, i personally find the sprouted wheat variety very tasty. I realise that it is quite pricy and here in Australia it is more than double the price of ordinary bread.
I personally think it is worth it as i slice it very thin and enjoy it with butter and tomatoe (toasted).can also be enjoyed with allowable fruit spreads for a sweet treat.
It has been my experience that the other varieties of sprouted essene bread is not quite to my liking, and i have not seen any where that the other varieties are recomended for O type.
Hope this is of benefit to you and i suggest you give it a try and if you like it you have a lot to gain, if not small price to pay to gain knowledge.
Kind Regards Carole