![Five Decades of Research on Opioid Peptides: Current Knowledge and Unanswered Questions | Molecular Pharmacology Five Decades of Research on Opioid Peptides: Current Knowledge and Unanswered Questions | Molecular Pharmacology](https://molpharm.aspetjournals.org/content/molpharm/98/2/96/F1.large.jpg)
Five Decades of Research on Opioid Peptides: Current Knowledge and Unanswered Questions | Molecular Pharmacology
![PDF) Release of β endorphin and met-enkephalin during exercise in normal women: Response to training PDF) Release of β endorphin and met-enkephalin during exercise in normal women: Response to training](https://i1.rgstatic.net/publication/16867690_Release_of_b_endorphin_and_met-enkephalin_during_exercise_in_normal_women_Response_to_training/links/0c960517f74cef1f62000000/largepreview.png)
PDF) Release of β endorphin and met-enkephalin during exercise in normal women: Response to training
Emily Macaulay on Twitter: "Wahoo! New tattoo marking end of 2015 fundraising challenge for @janesappeal. This is met-enkephalin (runners high). https://t.co/ExR795QF4p" / Twitter
Stay Tru Tattoo - By Robert Klein. Runner sketch today with his marathon time and runners high molecule (met enkephalin I think?) | Facebook
![Octopus Ink Tattoo on Twitter: "#runnershigh #sciencetattoo #octopusinktattoo #pdx #tattoos #blackandgreytattooes #lakeoswego #tattoos # running #heartbeat #runner https://t.co/I4cOvhNtaE" / Twitter Octopus Ink Tattoo on Twitter: "#runnershigh #sciencetattoo #octopusinktattoo #pdx #tattoos #blackandgreytattooes #lakeoswego #tattoos # running #heartbeat #runner https://t.co/I4cOvhNtaE" / Twitter](https://pbs.twimg.com/media/DIu8SGeVYAEW5E0.jpg)
Octopus Ink Tattoo on Twitter: "#runnershigh #sciencetattoo #octopusinktattoo #pdx #tattoos #blackandgreytattooes #lakeoswego #tattoos # running #heartbeat #runner https://t.co/I4cOvhNtaE" / Twitter
Tattoos By Loz “Akai Kiku “ - #runnershigh Done with my liner pushes bigger needles video on my story to see it in action thanks for looking | Facebook
![My new tattoo, met-enkephalin, chemical formula for runners high | Chemical tattoo, Neck tattoo, Running tattoo My new tattoo, met-enkephalin, chemical formula for runners high | Chemical tattoo, Neck tattoo, Running tattoo](https://i.pinimg.com/originals/09/54/db/0954dbbe29df531688d5ea1921ed8cdd.jpg)