special subjects
Glucosamine
What are the possible side effects of glucosamine?
Glucosamineis safe for most people. Common side effects are itching and mild digestive problems such as heartburn, diarrhea, vomiting, and nausea. Other side effects include fatigue, headache, difficulty sleeping, sun sensitivity, and nail changes. People with liver disease should avoidglucosamineif possible. People who have a shellfish allergy and takeglucosamineextracted from shellfish may have an allergic reaction. Some people with asthma have had flares. 