We only heat our bone broth to a slightly higher temperature than the cook temperature. that way we are able to preserve all the nutrients without the risk of overcooking it or denaturing the useful proteins in the broth.
The way we are able to extend the shelf life of our products is packaging them in an aseptic and vacuum-sealed environment.
We are using the latest Tetra Pak technology to keep our broths fresh and have a shelf-life of two years. You can find more info in this article: About our packaging - basic info about Tetra Pak