Beyonce Reveals Secrets Behind Vegan Diet

Celebrity trainer Marco Borges created a plant-based diet plan for going vegan in three weeks.
3:51 | 06/08/15

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Transcript for Beyonce Reveals Secrets Behind Vegan Diet
Next up, a "Gma" explclousive, beyonce speaking out on camera about the diet that made her more flawless than ever. She says if a foodie like her can do it, so can you. Ma Mara schiavocampo is here. Reporter: We all saw how amazing beyonce looked. She's made radical changes to her diet. She says she's never felt better. Queen bey ruling everything from the red carpet to the stage. ? Forever young I want to be forever young ? Reporter: Now, beyonce is baring all of her secrets. How she maintains her new, trimmer body. This is something I have to share with everyone. Reporter: For the first time, speaking about her experience on the 22-day revolution. I'm not the thinnest woman. I have curving. I'm proud of my curves. And I have struggled since a young age with diets. And, finding something that actually works. Actually keeps the weight off has been difficult for me. Reporter: The program, created by celebrity trainer Marco Borg erk S focuses on plant-based foods. A plan for going vegan in just three weeks. Psychologists have learned it takes 21 days to make or break a habit. If you adopted a habit over 21 days, on the 22nd day, you have a new habit. Reporter: Choose plants over processed. Eat three meals a day, pro us missing on carbs over protein and fats. Exercise 30 minutes a day. Drink plenty of water. Being on a vegan diet can reduce your risk of diet-related problems. Reporter: Beyonce is a such a fan, she's partnering with borges to create a vegan meal delivery service. For the average person who wants to switch to a vegan diet, do not shop the center of the grocery store. That's where the packaged and processed food will be. Go the outside. Look for the fresh produce. Reporter: Beyonce revealing the results not only take off pounds. I felt like my skin was really firm. A lot tighter than when I deprive myself of food and got the weight off fast. And the weight stayed off. Reporter: A superstar secret. ? I woke up like this ? Reporter: To living flawlessly. All right, so if you're looking for an alternative to the eggs and Baig con. We have options. Avocado spread on toast. A little bit of red person flakes. Some salt. This is a delicious breakfast. Everybody loves guacamole. This is so good. This is chia seed pudding. You like snit. I love it. It remind mes of my grandmother's tapioca pudding. I'm going with the barbecue in the next half hour. Sorry. No. Beyonce's plan? Barbecue? If you want to do it, you can find way to make it work. She'll be back tomorrow. She's passionate about the children of Haiti. She says be good. B-e-y good.

This transcript has been automatically generated and may not be 100% accurate.

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