If you want a simple and satisfying way to get a nutrient-packed meal or snack fast, you can’t beat a smoothie. They've got everything you need—from protein and fiber to healthy fats and a heaping serving of fruits and vegetables—all in one sweet, slurp-able package.

Jordan Mazur, who oversees all nutrition related services for athletes and football operations for the San Francisco 49ers, swears by smoothies. He often makes them for his athletes as well as for himself. But, he warns, not all protein powders are created equal. “Just comparing prices when it comes to protein shouldn't be a deciding factor for you—quality is what you're looking for,” he says. “Oftentimes you pay for what you get, and high-quality ingredients don't come cheap.”

The Clean Label Project, a nonprofit organization that examines labeling safety issues, analyzed the top-selling powders and drinks on the market and found that many of them contain elevated levels of heavy metals like arsenic, cadmium, mercury, lead and BPA. “These heavy metals are bad for the body because they can build up,” says Mazur. “And there's evidence to suggest that build up of these contaminants can have adverse health effects.” That's why he relies on grass-fed whey protein from Momentous. It's not only NSF Certified for Sport and Informed Sport Certified, but it's also top-rated on the Clean Label Project.

We asked Mazur, along with celebrity trainer Joey Thurman, for a few of their favorite smoothie recipes. Ones that don't just taste good but pack a serious nutritional punch. These would be ideal breakfasts or easy afternoon snacks and would certainly hit the spot after a workout.