What type of protein in used in OLLY protein powder? OLLY October 25, 2019 14:42 Updated Follow We use a 100% plant-based blend of pea and flax protein. Related articles What is different about OLLY Plant Powered Protein? Can I mix OLLY Protein Powders with other liquids besides water? What are the protein sources in OLLY Bars? Do I need protein if I don't work out? When is the best time to drink OLLY Protein Powder? Comments 0 comments Article is closed for comments.