Fresh approach to Beauty: The skin is by far the largest organ of the human body. It is extremely sensitive to external factors, such as ultraviolet radiation, dirt and cold weather, as well to emotional influences like stress. All these conditions have adverse effects on the skin. The good news is that most problems can be prevented by proper maintenance and care. The skin produces millions of new cells a day, regenerating itself completely within 30-40 days, depending on the the person's age. Around the age of 35, however, the skin's natural reinvestigation processes began to slow considerably.