For example, if your only symptom is tingling in your hands, you might undergo all sorts of diagnostic tests before your doctor thinks Maybe we should check her B12 level. But even if you manage to get your doctor to test your B12 level, youre only halfway there because the blood test is just not very good
So while a test might show that chicken and broccoli are safe on their own, eating them together in a casserole could trigger symptoms
But straightforward
Higher-likelihood alternative causes: In UK clinical guidance, GSM is a common and under-treated driver of dryness, dyspareunia and tissue fragility, and should be actively assessed, particularly in peri-/post-menopausal patients or those with iatrogenic hypo-oestrogenism
Protein Chem ., 45 , 1-52
May MJ, Vernoux T, Sanchez-Fernandez R et al (1998) Evidence for posttranscriptional activation of -glutamylcysteine synthetase during plant stress responses