At the moment, we do not offer collagen protein as an option to add to your blend.
Although collagen protein is an important protein in our bodies that helps with the structure of things like hair, skin, and nails, it is actually not a very great protein source to consume due to its bioavailability. Your body can make collagen protein from other sources of protein and nutrients. This is why we suggest focusing more of your protein intake on complete, quality sources such as those from animal (eggs, dairy, meat, and seafood), tofu and soy – assuming you can tolerate them.
That said, it's always good to incorporate a variety of different protein sources throughout your day! Protein from veggies, whole grains, beans, legumes, nuts/seeds are still great, they just aren't aren't utilized as well by the body.
That said, we're always open to suggestions! If there is an ingredient you would like to see in our lineup, let us know at firstname.lastname@example.org