Check My Body Health , the UK. branch of Global Health Tests Ltd., provides at home bioresonance hair strand sensitivity testing to help users identify food, environmental, and nutrient sensitivities from home delivering results within 3–5 working days via email . Users activate their test online and send a few strands of hair using a unique redemption code; no physical kit arrives by mail . The company supports HSA/FSA payments, offers expert meal planning service add-ons, and backs its offerings with a satisfaction guarantee, though claims around testing accuracy and alternative medicine approaches have been noted by critics.