Endorphins and morphine are two different substances that affect pain relief in humans.

Endorphins are naturally occurring substances in the body that are released in response to pain or stress. They bind to the same receptors as opioids and provide pain relief. On a scale of 1-10, endorphins are often rated as providing moderate pain relief, around a 5-7.

Morphine, on the other hand, is a synthetic opioid that is often used to treat severe pain. It is considered one of the most effective pain relievers available and provides strong pain relief. On a scale of 1-10, morphine is often rated as providing strong pain relief, around an 8-10.

It's important to note that individual experiences with pain relief can vary greatly and that these ratings are generalizations. The effectiveness of endorphins and morphine will depend on several factors, including the individual's level of pain, tolerance, and sensitivity to these substances.
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