Suppose you consumed a shake containing carbohydrates without protein. This has been researched many times and low doses (e.g. 6g) of carbs do not increase net protein balance after training. Of course, 6g is next to nothing: maybe we just need more to see an effect. Børsheim et al. (2004) tested this. Here, subjects were given either a placebo or a post-training shake containing 100g of maltodextrin.
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