While we worked hard to check all facts in Proteinaholic, we’ve found a few mistakes. This page contains the corrections. Depending on which edition you have, the errors may have already been corrected.

Page 8: “… a 6-ounce steak – again, pretty small, especially here in Texas – has 70 grams of protein…”

Actually, an 8-ounce steak contains about 76 grams of protein, according to the USDA National Nutrient Database. A 6-ounce steak contains only 57 grams of protein.

Pages 193-4: “… supplementation with 8 grams of heme iron spiked NOC levels…”

That should have been 8 milligrams, not grams. Here’s the original source.

And a correction in progress, spurred by an email:

Hello Mr. Davis, I’m doctor and dietitian in Romania, heave read Proteinaholic, great job!
Sorry I’m bothering you – I have a question as I can’t find an information from a study reference within your book:
Bergen and Wu 2009.
I need this info for a conference where I’m going to speak about protein quality.
I can’t find where this study states what you stated in your book:
“A 2009 study found that vegetarians ingest more probiotics and prebiotics, and their flora is better at recycling nitrogen to make new proteins. It’s therefore possible for vegetarians, even with lower protein intake, to produce all the protein they need since they are using colonic reabsorption more efficiently (Bergen and Wu 2009). ”
After reading this study it turns out it does nowhere mention about vegetarians or a comparison with nonvegetarians.
Where is the scientific reference for this info in your book?
Thank you very much in advance!
I really need this info for my work, I definitely do NOT contest your work, on the contrary, I’m a huge supporter of you!

My response: I need to look back at this. I was speculating and there should be another reference to the microbiota of vegans.  I think the David et al reference. The point being that vegans have more bifidobacter and more butyerate producing microbiome and consume more prebiotics which has independently shown better AA usage.  I did not mean to imply that this has directly been shown, but was rather speculating.  I will clarify with publisher for next edition, and will note on website mistakes. Thanks.