“I’m tracking my macros^[1].”

“I’ll pass on that, it doesn’t fit in my macros^[2].”

“I’m on the Macro Diet^[3].”

Macros seem to come up often in the corners of the internet and social media devoted to people trying to lose weight, improve their health, look better and feel better about themselves. But what the heck is a macro?

With more information than ever available at your fingertips, and more diets out...