I have decided to start taking B12, however I'm not sure what the best method is. Clutter has suggested that sublingual lozenges, sprays, or patches, are better than tablets as Hypothyroidism reduces stomach acid which can make absorption difficult. However I came across this post on Phoenix Rising forums.phoenixrising.me/ind... where some folk were saying the citric acid in the lozenges was causing problems for their teeth. Does anyone have any experience of the lozenges, the sprays, the patches, or tablets? I would really like to hear people's opinions and experiences with the different methods.