Can black berries still be used after 2 years?

Black wolfberry expired 2 years usually can not be used.

Because black wolfberry expired may occur mildew, resulting in black wolfberry contains more mold, eating will cause irritation to gastrointestinal mucosa, resulting in gastrointestinal dysfunction, normal people prone to nausea, vomiting, abdominal distension, fever, abdominal pain and other abnormal symptoms. In addition, there may be more insects after the expiration of wolfberry, easy to lay eggs in wolfberry, after eating will cause insects and eggs to enter the body together, will increase the risk of acute gastroenteritis, so wolfberry expired 2 years after the normal population is generally not recommended to eat.