Carnitine may well turn out to be the perpetrator of the "crime" of heart disease, but it's way too early to tell. Simple, sound-bite answers to difficult questions may make us feel good, but they rarely lead to effective solutions.
For more than half a century we were told that red meat and eggs are bad for us because they raise our cholesterol, only to find that the evidence supporting this hypothesis is weak at best. Let's not make TMAO the new cholesterol.
For now, my gut reaction to the news about TMAO is that context matters. It's not really just about meat or eggs in the diet, but about the overall dietary pattern, the kinds of meat, the feed and treatment of the egg-laying hens, and our exposures to chemicals and antibiotics.