Sadly, Stevia doesn’t agree with me either, although I don’t feel as ill as if I have drinks with aspartame, which is what most drinks in the UK use.

I recently bought a soda stream for just this, since I now mostly drink sparkling water. There aren’t many cordials here that don’t use a sweetener, and many of my previously favourite kombucha brands now use aspartame - but there’s enough to have some choice.