The 40 Environmental Chemicals, Preservatives, & Expanded Additives - Add-On Only - ALCAT Test Kit identifies potential sensitivities or intolerances to 40 various environmental chemicals, preservatives, and additives. This is a tolerance test, not an allergy test. Note: This is a pre-paid shipping test kit that will be mailed and it requires a blood draw. Please contact your local hospital, clinic or phlebotomy service for lab specimen collection.