Foundations are creams, lotions or powders used as a base for facial makeup. They can be used to color the face and to conceal blemishes to produce an impression of health and youth. Foundations contain ingredients that apply color and/or powder to the skin in a precise and controlled manner. Foundation product safety is established by selection of ingredients that are safe and suitable for this purpose. In addition, Foundations 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.