Curcumin Side Effects Curcumin is an important ingredient of turmeric. Basically, it is a polyphenol compound that gives turmeric its bright yellow color. As we all know, turmeric is widely used as a spice and coloring agent in food recipes. The scientific name of turmeric is Curcuma longa and this herb belongs to the ginger family. There are several benefits of curcumin. The extracts of this ingredient is used for treating various health problems such as arthritis, chest congestion, indigestion, heartburn, stomach ulcer, jaundice, etc. Many of us have a misconception that since it is a naturally occurring substance, it cannot have any side effects. The fact remains that there are some side effects and one should be aware of them, before opting for it as a nutritional supplement.