Buckwheat is one of those contested Paleo items. Some love it. Some love to hate it. It’s not a grain; it’s a seed, and while it contains no gluten, it does contain phytic acid which means that like other seeds (and nuts and legumes) it should be properly soaked or sprouted before consumption. Unlike most seeds however, buckwheat has a naturally high level of phytase, which means it can help break down the phytic acid itself if you just put it in some filtered water overnight (see here- steps 1 and 2). It’s definitely not on Mark Sisson’s menu though, as buckwheat has a fairly high level of starch, but that’s precisely why I’m introducing it to my diet.