I saw a nutritionist for a while before and she did recommend I think plasma blood tests for a complete mineral profile. I can't remember the exact terms, but she said they are expensive, at about 250 pounds or something. I don't know how definitive this kind of testing is, but there are so many tests id like to get done - amino acid profile, fatty acid testing, vitamin profile etc... The list goes on and doctors aren't giving away free testing.
I have got ill immediately after dairy based yoghurts with probiotics several times.
I'll be booking in to see my doctor again soon to find out about the chronic fatigue ive been having and ask him to give me some kind of Sugar / diabetes / adrenal test etc. IF there are any specific forms of testing you recommend me to ask for that i can get free id be grateful.