Is a high protein diet really needed?

[blue9steel]

Has any one got ant scientific knowledge to back it up?

Here is small selection to get you started:

Tarnopolsky 1992 NBAL 1.41g/kg, recommended 1.76g/kg 1stdev, 2.11g/kg 2stdev
Lemon 1992 NBAL 1.53g/kg, recommended 1.73g/kg 2stdev
Walberg 1988 1.6 > 0.8 NBAL somewhere between the two
Tarnopolsky 1988 NBAL 1.05g/kg
Hoffman 2006 Positive results from higher intake but didn't reach statistical significance
Phillips 2011 1.3-1.8g/kg max protein synthesis, 1.8-2.0g/kg prevent lbm loss in deficit
Pasiakos 2013 Optimum intake between 1.6-2.4g/kg
Mettler 2010 2.3g/kg > 1g/kg
Campbell 1995 NBAL between 0.8-1.62g/kg
Celejowa 1970 2g/kg was too low for 50% of competitive weightlifters during training camp (subjects suspected of steroid use)
Consolazio 1975 Positive NBAL at 1.39g/kg, 2.76g/kg > 1.39g/kg
Fern 1991 NBAL at 1.3g/kg
Laritcheva 1978 Positive NBAL at 2.2g/kg, one lifter negative at 1.85g/kg
Lemon 1995 Inverse relationship between energy intake and protein requirements
Munro 1964 2g N (1g N = 6.25g Protein) for each 1000 calories surplus/deficit
Chiang 1988 1.94g N for each 1000 calories surplus/deficit
National Academy of Sciences National Research Council 1989 NBAL at 1.35g/kg, 1.69g/kg 2stdev (multiple study meta-analysis)
Layman 2004 1.6g/kg > 0.8g/kg
Helms 2013 2.3-3.1g/kg of FFM
Antonio 2014 4.4g/kg !> 1.8g/kg