[header] How to test iodine levels [title] Purchase a tincture of iodine. [step] If you don't already have an iodine solution at home, you will need to purchase a tincture of iodine. These are available at most pharmacies and drug stores, as well as online. 
[substeps] While most iodine solutions have an orange tint, some are clear. Be sure to buy an orange solution so that it shows up on your skin.