Ferritin: The Number Nobody Talks About That Might Be Why You're Exhausted

You're sleeping eight hours and waking up tired. Your coffee stopped working. You're dragging through the afternoon like you're moving through wet cement. There's one lab marker that explains this combination of symptoms more often than almost anything else - and most people have never heard of it. It's called ferritin. And if nobody has ever checked yours, this might be the most important thing you read this year.