The protein digestibility-corrected amino acid score. Recent developments in protein quality evaluation.The amino acid composition of mammalian collagen and gelatin. The Biochemical journal, 61(4), 589-600. In fact, next time you are in a store, pick up a bag of pork rinds (gelatin and collagen) or some of your favorite gelatin-brand fruity snack, and you will see that the large companies who follow compliance will have a note on their labels stating the protein is “Not a significant source of protein”. Collagen and gelatin-loaded products are not beneficial for athletes and are not a significant source of protein. Because as far as these companies are concerned, they can both be labeled as “beef” since they originate from a cow. As a consumer, you have to put the trust in the company you are purchasing from in hopes that your beef protein powder is actually beef, and not collagen, gelatin, and scraps. Sourceīeef protein (from actual beef, as in a steak or ground beef)Īs previously discussed, most of beef protein powders contain mainly collagen and gelatin, thus they have a PDCAAS of zero. A value of 1.00 is the highest possible PDCAAS score. The PDCAAS is a method utilized by government agencies that measures the quality of protein based on the amino acid requirements of humans and their ability to digest these protein sources (2). This is a comparison of the various protein sources we have been discussing using the Protein Digestibility Corrected Amino Acid Score (PDCAAS). If that doesn’t have you sold, this should. Glycine comes up on lab tests that test for protein content based on nitrogen content as protein, which allows companies to pad the amount of protein in their product by stuffing them with glycine. Glycine is a filler amino acid added into products to cheapen the cost of the product. These are the amino acids that aid in recovery, muscle protein synthesis, etc.Īnother massive difference is the amount of glycine in beef protein (beef protein isolate contains 20.1 grams of glycine, more than 14 times the amount of glycine in whey protein). The amount of essential amino acids and BCAAs are what we really want to consider when we look at different sources of protein as athletes when it comes to determining what is best for our lifestyles. 19.4 grams in beef protein isolate per 100 g). The whey product has much more of the essential amino acids and BCAAs (34.96 grams in whey vs. Notice that there are some massive differences. Remember, we are not comparing whey protein isolate to a steak dinner here! This is a comparison of “beef protein powders” to whey protein powders. They are nearly identical, so for the purposes of comparisons between whey and the other two, we will simply compare whey vs. The first thing you should notice is the glaring similarities between beef protein isolate and gelatin. gelatin (turn sideways on mobile): Amino Acids All these labels are just fancy words for what beef protein really is: collagen, gelatin, and left over scraps.īelow is an amino acid breakdown of an unnamed whey protein product vs. Collagen is not a complete protein source, and is high in glycine, proline, arginine, and hydroxyproline. Now these sound fancy, but what exactly are they? Hydrolyzed Beef Protein Isolate is also known as Collagen. A quick search on the internet shows that the top 5 selling beef protein products contain the following ingredients: Hydrolyzed beef protein isolate, Hydrolyzed gelatin. The price of beef is exuberant, making this impossible. We all like to romanticize with the idea that beef protein is filet mignon grinded into powder, but it is simply not. The important question however, is: what is beef protein powder? Beef is quite a broad term. By now you may have seen “beef protein powder” advertising that it is a suitable alternative to milk and whey based proteins.
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