Since he is in his early 50's, at this point in his life ..alot of physicians would not be recommending eating much red meat. And only lean.

Some seafood, like salmon, trout, etc. have a healthier "fat" and provide still some protein.

Unless he is competing or a real endurance athlete, it seems quite excessive to eat much more red meat... Over in Bicycling Magazine forums, alot of the cycling men in 40's and upward, are REDUCING their red meat intake.