Cinnamon is an excellent spice that most people pair with sugar when creating desserts. But you can use cinnamon with savory dishes, and for good reason! Cinnamon is a natural blood thinner that can help prevent blood clots from forming inside the body. However, cinnamon does have some adverse side effects if taken in large doses, such as shortness of breath, increased heart rate, and increased accumulation of toxins within the body. Exercise care when using cinnamon for seasoning your meals to avoid overdosing. You generally shouldn’t have more than one teaspoon of cinnamon per day.