I agree with Karlos, 'excess' protein intake is only likely an issue in someone who is already suffering from renal problems & not something to worry about in a relatively healthy (albeit overweight) individual, although, also agreeing with DC, too much is going to knock-up your total daily calorific intake. A very high protein intake (> 2 g/kg bodyweight or > 35% total daily calorific intake) can cause problems due to slow deamination of amino acids within the liver &/or nitrogen build up which cannot be excreted fast enough by the kidneys. However, putting things into persepective, one mustn't confuse weight of a particular protein food group vs absolute protein intake from that food...for example, eating a 4 oz (113 g) chicken breast actually provides only 35 g of absolute protein intake.