21 Day Challenge is a weight loss eBook that features Brazilian techniques to help people lead a healthier lifestyle.

The eBook includes five video lessons divided into cardio, strength training, dance class, high-intensity interval training, and warm-up and stretching.

Additionally, the eBook includes a guide of 100 healthy recipes and a grocery list to help people start eating better.

The 21-day challenge presented in the eBook consists of following the provided menu to effectively lose weight. The program is also suitable for people who suffer from pain, not just those seeking to lose weight.

With the "21 Day Challenge", readers have access to practical informationand strategies to improve their health and fitness in just three weeks, with video lessons, recipes, and dietary guidelines.