Since collagen type II contains chondroitin and glucosamine, large doses might lead to the same side effects as those seen with chondroitin and glucosamine supplements. These side effects include nausea, heartburn, diarrhea and constipation, drowsiness, skin reactions, and headache.
A stool analysis is a series of tests done on a stool (feces) sample to help diagnose certain conditions affecting the digestive tract . These conditions can include infection (such as from parasites, viruses, or bacteria), poor nutrient absorption, or cancer.
1 A stool culture is done to find the cause of an infection, such as bacteria, a virus, a fungus, or a parasite. To learn more, see the topic Stool Culture.  A bowel transit time test is done to help find the cause of abnormal movement of food through the digestive tract.