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? Do I need protein if I don't work out? How long are OLLY Bars good for? What are the protein sources in OLLY Bars? When is the best time to drink an OLLY Protein Powder? Comments 0 comments Article is closed for comments.