'Reactivity test': Take your choice of reactivity test from the experts at Test My Intolerance. Improve your health: With results that can help you make changes to your diet that could leave you feeling fitter, healthier and happier! Hair sample: Just send a sample of hair to the lab and receive your results in seven days. Results: Aim to help you steer your lifestyle in a healthier way that will have you feeling better for longer! Test options: Opt for a silver or gold single test or upgrade for a combined food intolerance and allergy test. Bio-technology: Uses bio-technology. Food Reactivity Silver Test | UK | Living Social