Protein has been a real trend in recent times, one of the only nutrients that receives plenty of good press and barely, if any, negative coverage.
However, an Australian study has claimed that consuming protein in the form of a shake can affect your mortality.
Australian GP Dr Sam Hay explains: "This study found that protein shakes with added amino acids could cause premature death, mood swings and obesity."
Dr Hay told bodyandsoul.com.au that because the study wasn't conducted on humans, the results will differ, but it's indicative of some things we should be wary of.
He highlights: "Firstly, there's a huge variation in what constitutes a 'protein shake'.