Now that I think of it, we did both have frequent burping for the first few months. This has now gone though. No sin of burping for the last month or so. Something which may be related to thiamine : we both have grown a lot of hairs at the base of the skull, from a line south of the bottom of the ears. Thick and wavy. I wonder if this is not an external manifestation of repairs induced by thiamine on the brainstem, since this area is the most targeted by thiamine deficiency. If more thiamine brings more hair there, what about other parts of the skull? What is missing in different areas of the scalp? Or will thiamine eventually bring hair to other areas?