1.ALCOHOL-Alcohol is a toxin which deprives the body of its vitamin reserves, especially vitamin B and vitamin C which are necessary for healthy skin and also causes skin dehydration. 2. SMOKING-Smoking means Nicotine (a toxic substance). It interferes with cell respiration & slows down the circulation. This makes it more difficult for nutrients to reach the skin cells and for waste products to be eliminated which leads with a tendency towards open pores. It also releases a chemical that destroys vitamin C leads to premature ageing. 3. STRESS-The symptoms of stress are seen in many different forms, including insomnia, poor digestion, headaches, muscular tension which leads to skin disorders.