Some people like models or actors have to look their best for certain occasions like a shooting. They have special training programs and diets that allow them to improve their looks within several weeks to an impressive degree what I have heard.
What are they doing to achieve these results? I am not talking about long lasting or healthy measures to get in shape, I know enough about those. I wonder what one can do to boost his looks within a few weeks, aiming to look the best at a specific time, no matter what.