Painkilling chemicals that occur naturally in the body are known as a. plateletsb. endorphinsc. hormonesd. triglycerides

I believe that the answer is endorphins (B)

A:platlets are a type of blood product we produce, B: endorphins are a brains natural release of pain killing chemicals c: hormones can be gender specific and dont affect pain levels typically, triglcerides is the fatty blood product we should try and keep under control, it has nothing to do with pain management.  The answer is Endorphins