No side effects. Jiyitang Canna avocado black coffee contains instant coffee, canna dietary fiber CR-RS, isomaltooligosaccharide, avocado powder, sodium caseinate, maltodextrin and other ingredients. After taking, it can promote intestinal peristalsis, promote metabolism, and help to lose weight and burn fat. However, it should be noted that infants, pregnant women and lactating women are prohibited.