Side Effects of Collagen
Most common side effect of collagen: Lingering taste in the mouth. A small percentage of users report that they get a slight lingering taste in their mouth. It usually subsides within 30-60 minutes.
Side Effect 2: Possible allergic reaction for individuals allergic to collagen sources (bovine, porcine, fish, shellfish, chicken).
Side Effect 3: Decreased appetite. Depending on your particular situation, this could be a side effect or a benefit.
How common are the side effects of collagen supplements?
These side effects are reported by approximately .1% of collagen supplement users. Other than in the case of allergies, the drawbacks, or side effects, of eating collagen appear to be negligible.