My husband needs to be tested for shellfish intolerance and I would like to have some testing to shed some more light on what might be worsening my hashi. My gp no longer provides testing and just told us to look it up in the yellow pages!!??? I know there are many very knowledagable peeps on here and would love a good recommendation. Is blood better than hair? Can hair actually work? There is a place in Spain that tests for 600 food and none food potential allergens using hair for only £45. Too good to be true?? Many thanks in advance.