Preheat the waffle iron according to the manufacturer's instructions.
Whisk together Herbalife shake mix, flour, sugar, baking powder, baking soda, and salt in a large bowl.
In another bowl, whisk together eggs, buttermilk, and butter. Add to dry ingredients and stir just until combined.
Spray the waffle iron with cooking spray. Pour batter into the waffle iron, using about 1/2 cup for each waffle.
Cook according to the manufacturer's instructions until golden brown. Serve with desired toppings.
Enjoy your delicious and healthy Herbalife waffles!