Whether to increase muscle mass, meet protein needs as they age, compensate for the absence of protein-rich food from their diet, or to promote satiety to support weight loss, it is important to know how much protein is in the supplement products being consumed. In all of these situations, the consumer relies on the protein content declared on the Nutrition Facts label. However, not all supplements are produced equally and some less scrupulous manufacturers cut corners to improve their margins. As a result, prominent brands have been accused of "amino spiking" or "nitrogen spiking" to boost the apparent protein content of their products.
To evaluate the current state of the market, we conducted laboratory research where the objective was not an evaluation of contamination, but the assessment of protein content and label claims.
