You can buy the best cleansers, toners, serums and moisturizers, but if you do not provide the body with the ingredients it needs to repair and regenerate from the inside, your efforts will be futile. Beautiful skin, hair and nails come from the inside. Diet and lifestyle are extremely important for maintaining a healthy and youthful appearance. A clean diet consisting mostly of fruits, vegetables and water is a good place to start.Eliminating unhealthy lifestyle habits like smoking, excessive alcohol consumption, lack of sleep, excessive sun exposure and using chemical laden products are also important steps for maintaining a healthy appearance. It is also necessary to provide the body with nutrients required to maintain a healthy and youthful appearance.