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? How long are OLLY Bars good for? 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 an OLLY Protein Powder? Comments 0 comments Article is closed for comments.