Sample size products that are currently available will allow you to test on your skin.  These will provide enough product for you to determine if you have any sensitivities before purchasing the full size product. However, typically it won't be enough product to see appreciable changes in the skin. 

IMPORTANT: The purpose of our sampling program is to afford our customers an opportunity to purchase a small sample size of a product to test on their skin. Samples are not available for purchasing mulitple quantities of the same item. In the event multiples of the same product are purchased your order will be cancelled and a refund provided. If there is a special event in which you are putting together gifts sets for a special occassion, etc., you must obtain prior approval as we will no longer permit the purchase of mulitple quantities of any one sample.