Analysis of the protein content in whey protein dietary supplements

Currently, the consumption of whey protein dietary supplements has been growing. With the increased demand for this product, industries have increasingly developed whey protein-based products. This work aims to analyze the protein content of these products, verifying if the amount of protein found in the labels are truly the ones found in the product. For this verification, five best selling brands were selected on the market and a sample of 200 grams of each product that was submitted to an analysis using the Kjeldahl method was collected. Of the five samples collected, two samples had protein levels below that expressed on their respective labels, thus being out of compliance with current legislation. Inadequate protein levels in whey protein samples may harm consumers of the product, who purchase them in an attempt to increase protein intake and often fail to obtain the expected protein intake without consequently achieving the desired physiological results.