Demystifying some facts about fast food burgers:
"Fast food hamburgers: what are we really eating?"
Fast food hamburgers: what are we really ea... [Ann Diagn Pathol. 2008] - PubMed - NCBI
A careful reading of the entire NIH article, not just the abstract, would reveal some interesting facts. First, that article was in 2008 so, in research time, that's fairly old. Science does move on in increments, both verifying and refuting some previously believed facts. It's wonderful!
Guidelines for slaughtering, meat cutting and further processing
Using a simple Google search it's found that all hamburger has a high water content, both raw and broiled patty.
The study also identified how much skeletal muscle was in the meat. ". In 7 of 8 brands, more than 20 fragments of skeletal muscle were identified"
Yes, that's true! Pretty hard to have beef with no skeletal muscle in it!
It would also be impossible to not have nerves, blood vessels (or water) in your hamburger even if you raised and butchered them yourself. They're in the skeletal muscle. But the scientists doing the study were certainly precise in their study, I have to say.
But one source, relating this study said there was no fat mentioned. Just show how facts gets confused; adipose tissue is fat. (As well, I know!
The plant material may be soy. But that article is from 2008 and most fast food joints (now) don't add soy to their meat to extend it.
It would interesting to read the same research being done in 2014.
Plant material could also be spices: oregano, parsley or ??
I don't think fast food burgers are very healthy compared to what one can prepare at home, although I do eat them sometimes.