"Protein is essential for muscle repair, hair, skin, nails and your metabolism," Karena and Katrina say.

The amount of protein you need depends on how hard you're going in the gym, but the average Jane needs about 46 grams of protein a day.

Protein shakes are a great way to get your protein in quick, especially when you're on the go. Karena and Katrina created the Perfect Fit Protein, where one serving delivers 15 grams of plant-based protein, and is also gluten-free and dairy-free (unlike whey proteins which can bloat you). However, you don't need protein shakes to get your daily amount in. Simply stick to sources like salmon, turkey, chicken, tofu, beans, etc. and watch the body fat melt away.