Although collagen fudge has improved some sub-health symptoms, it still has corresponding side effects. The side effects of different constitutions are different. Generally speaking, the main side effects are as follows. The first side effect will lead to menstrual disorder, especially for people with abnormal endocrine, which will lead to irregular menstruation. The second side effect is that people with weak stomach and intestines will have symptoms such as diarrhea, vomiting, loss of appetite and poor mental state. The weaker the spleen and stomach, the more obvious the side effects he shows. The third side effect is that people with allergies will have allergic reactions, such as rash on the skin, accelerated breathing and blurred vision. These are the side effects of collagen fudge. Now we know what its side effects are. If some people have the same or similar symptoms when taking collagen fudge in their lives, it may be caused by its side effects.