Free images results:
 

Protein pictures, stock photos and images

 
1


 
Greens Royalty Free Stock Photos
Author: Showface
 
1


 
Also, here are some commercial RF-licensed images that match your search criteria:  
Protein Royalty Free Stock Photo
Author: Rob3000

Explore more commercial options: More Protein Stock Illustrations & Vectors | More Protein Stock Video Footage