Not that every study agrees with this, but here is some research on chocolate milk and timing of protein ingestion….
Daily chocolate milk consumption does not enhance the effect of resistance training in young and old men: a randomized controlled trial
Cameron J. Mitchell, Sara Y. Oikawa, Dan I. Ogborn, Nicholas J. Nates, Lauren G. MacNeil, Mark Tarnopolsky, and Stuart M. Phillips
NRC Research Press, 2014.
“….Because older men are resistant to anabolic stimuli such as resistance exercise (Kumar et al. 2009) and protein provision (Cuthbertson et al. 2005), it seems likely that an even greater dose of milk or protein would be required to detect and ergogenic effect in older men (Moore et al. 2014)…. In fact, 40 g of high-quality protein has been shown to result in greater MPS after RT in older men compared with 20 g (Yang et al. 2012). To achieve such an intake, older men would have to consume the 1.4 L of chocolate milk required to provide the 40 g of protein necessary to induce greater MPS and considering that this amount of chocolate milk would contain 75 g of sugar….”
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Supplemental Protein in Support of Muscle Mass and Health: Advantage Whey
Michaela C. Devries and Stuart M. Phillips
Vol. 80, S1, 2015, Journal of Food Science
On timing…..
“…. In fact, while a recent meta-analysis showed that protein consumed during the so-called “anabolic window” resulted in greater muscle hypertrophy following a period of resistance training, when adjusted for total daily protein intake the effect of protein timing on muscle hypertrophy disappeared (Schoenfeld and others 2013). In addition, timing of protein intake did not result in greater strength gains following resistance training (Schoenfeld and others 2013). As such it seems as if absolute daily protein intake, not timing of protein intake, is the greatest predictor of muscle hypertrophy following resistance exercise. However, an important consideration is that adequate protein is consumed during the day to allow for maximal muscle hypertrophy, which would more than likely naturally result in consumption of protein in the hours before and/or after a resistance exercise bout….”
(my bolding)