Eyebrow Pencils are products that apply color to the eyebrows. They are used to fill in and define the eyebrows. They contain special ingredients that apply color where it is needed in a precise and controlled manner. The products are specially formulated to ensure that potentially harmful microorganisms cannot grow and multiply. The safety of Eyebrow Pencils is established by selection of ingredients that are safe and suitable for this purpose. In addition, Eyebrow Pencils are assessed for their potential to cause skin irritation or cause allergic reactions. Product safety is also ensured though strict adherence to the principles of Quality Assurance and Good Manufacturing Practices. This includes testing the compatibility of the product with packaging as well as shelf-life stability. Finally, the safety of products is monitored in the market-place to track any consumer comments or complaints. Companies include a phone number on their products where comments or complaints may be reported.