This seems to be a hot topic right now. Kamal posted a question regarding the management of Protein Restriction as one of the key points of some of the arguable drawbacks of a long term Paleo diet.
Lower IGF-1 levels have been strongly correlated with longer lifespan, and many people swear by this. But there's also folks who eat protein straight through their whole life and are happy and healthy even until old age.
Should we restrict protein every so often? What are the REAL benefits of it? Anybody have some in depth scientific reasons that support making the effort?
Also, as a side caveat to the real question here, does anybody have a testimonial of what they experienced when they did. I remember reading that Chris Masterjohn was able to see major improvements with a couple nagging ailments when he restricted protein for about 2 weeks.