Thanks Elisabeth! I'm told that it keeps for up to 6 months in a jar in the fridge, so I'll wait until I do a bread that has buttermilk in it.
Sourdough is an interesting subject for me and one I've shied away from. I've often had "allergic" reactions to sourdough bread in the past and not sure exactly what aspect caused it. I have a feeling these were very old starters that caused the reaction, and maybe making my own 'fresh' starter would not cause the same problem. Will have to try it and see. Living a life without sourdough has been very challenging, I'd love to find a way around this problem.
Amines have been associated with migraines and headaches, as well as other symptoms of food intolerance, including irritable bowel symptoms, eczema and depression.