Protein (2025) is a Horror, Thriller, Crime film that follows a gym-obsessed serial killer murders and eats a local drug dealer for his protein, inadvertently sparking a brutal and bloodthirsty tit-for-tat turf war between rival drug gangs. Currently, you can watch Protein on Amazon Video, Fandango At Home, Plex. Streaming availability may vary by country and platform over time. It has a user rating of 5.0 out of 10 from 7 votes. Fans of horror movies may also want to explore similar titles below.