One can get a free diet plan online from the Diet Plan website, depending on what type of diet one wishes to use, also obtainable from a general practitioner.

Ann Louise Gittleman is the founder of the fat flush diet plan. She promoted her diet plan in the 2002 release of her book called "The Fat Flush Plan."

There are some great diet plans for a 21 year old female. You first have to decide what kind of diet plan you want to go on. There are vegan, no gluten, and calorie diets just to name a few.

Amazon.com would be a great resource to search for diet plan meals and books to help you with a diet plan and to pick out a diet plan that you think you would be able to manage.

Changingshape.com is a well respected website that offers several types of diet plans including the sixteen hundred calorie diet plan and the free low diet plan for men.