The FDA recommends understanding the ingredient label and says "There is no list of ingredients that can be guaranteed not to cause allergic reactions, so consumers who are prone to allergies should pay careful attention to what they use on their skin", further warning that "[t]here is no basis in fact or scientific legitimacy to the notion that products containing natural ingredients are good for the skin".

Natural skin care has its roots in the 4th millennium BC in Egypt and the Middle East. It is believed that the Egyptians developed many natural skin care treatments for a variety of skin conditions. One such treatment consists of bullock's bile, whipped ostrich eggs, olive oil, dough and resin mixed with milk. In the modern age many people with unique skin types and needs (sensitive skin, dry skin, oily skin) have turned to natural skin care solutions.

Some examples of natural skin care ingredients include jojoba, safflower oil, rose hip oil, shea butter, beeswax, witch hazel, aloe vera, tea tree oil, and chamomile. Many of these natural ingredient combinations can be tailored specific to the individual's skin type or skin condition.

Natural skin care goes beyond the application of products on one's skin. It also pertains to a holistic philosophy surrounding the holistic care of one's body. This includes the belief that what is ingested will affects all aspects of health, including the health of skin. People who use natural skin care products are less concerned with artificial beauty enhancements, as they feel that natural beauty is healthy beauty.

Thetherapysystems is providing skin card products and therefore wants you to learn and understand skin care.

There is, however, no actual definition of natural according to the U.S. Food and Drug Administration (FDA). All ingredients are chemicals by definition. "Derived" ingredients are unnatural both according to the original substance and the method of derivation.
The term natural has considerable market value in promoting skin care cosmetic products to consumers, but dermatologists say it has very little medical meaning and the FDA states the claim has no legal meaning. Despite pressure from advocacy groups such as The Environmental Working Group (EWG) the FDA has not defined what natural is or how to achieve it. Contrary to popular belief the FDA does not regulate the sale of skin care and cosmetic products before they are sold.

Sources:
En.wikipedia.com
www.therapysystems.com