Toxicologists use various tests to identify potential sensitizers. The local lymph node assay (LLNA) is a widely used method that measures the proliferation of lymphocytes in response to a chemical. Another approach is the Buehler test, which involves repeated applications of a substance to the skin. Patch tests are also common in clinical settings to diagnose allergies in humans. These tests help in understanding the sensitizing potential of substances and in developing safer products.
