Here are three videos I would like to share with you. All of them are from vegsource.
First one is about Low Carb Diets (Atkins etc.), very popular for weight loss but is it really successful
Second video features Ultimate Fighter competition winner James Wilks who is also a practising vegan:
And the third video is from low fat and mainly starch diet guru John McDougall:
Have a long, happy and healthy life.