The lorem ipsum on the "journal" page does not inspire confidence. But I definitely believe that the idea is feasible. There's that guy who genetically engineered himself to produce lactose[1] and it worked, and this seems like a less risky way to do it. I'd love for a real product along these lines to come out. Would it even be legal to sell it though?
[1] https://www.youtube.com/watch?v=J3FcbFqSoQY