(Paleo, Whole30, gluten-free, dairy-free, no added sugar)
Heat water (either in microwave or a kettle) until it is hot but not boiling.
Stir in cinnamon, cayenne pepper and apple cider vinegar until thoroughly mixed.
Feel free to experiment with other spices such as ginger, turmeric, lemon juice.
If you need something slightly sweeter, try a 1 tsp maple syrup or honey to help it go down!