Does s wiss e collagen have side effects? I believe everyone knows that drugs are toxic in three aspects, even nutrition and health care products will have certain side effects. Protein may make the body fat, because collagen needs to be replenished to the body in time, and other energy will be absorbed by the body. Therefore, although the skin looks more elastic and smooth, I believe the body will be rounded up. If you use too much collagen, you may be allergic. Especially for people with allergies, it is best to follow the doctor's arrangement before using nutrition and health care products, and the doctor suggests using them first. If you use them yourself, you may be allergic. S wiss e collagen is not suitable for pregnant women because pregnant women themselves belong to a special group. In order to protect your health and the health of the fetus, it is best not to eat nutritious health products indiscriminately.