Before the 1970's, the primary ingredient in our protein glues was extracted collagen from hides of bovine and porcine. 

As consumers become heavily focused on the importance of biodegradability and eco-friendliness, manufacturers need to start thinking "green" in all facets of the manufacturing process.  Today’s consumers, especially Millennials and younger Gen Z bunch, place high importance on sustainability (Packaging Strategies).

They are scouring store shelves for products that are made and packaged sustainably.