Cut lemon into quarters and squeeze juice into blender.
Add about 1 1/2 to 2 cups watermelon cubes or balls (any seeds removed) to blender. Blend until watermelon a liquid. Let sit for a minute and use spoon to remove and discard some of the pulp that rises to the top — it’s okay if some remains.
Add turmeric, cinnamon, black pepper and collagen protein and blend for 10 to 15 seconds or until incorporated.
Pour into microwave-safe mug and heat for about 30 to 60 seconds until warm. Enjoy.