Always tired? Brain fog that just won’t quit? Feeling flat no matter what you do? It might not be “just life” – it could be your iron. Iron is one of the most common nutrient deficiencies in the world, but it’s also one of the most overlooked. And here’s the kicker: it’s not just about energy. Low iron can mess with your mood, memory, hormones, sleep, workouts – even how well you handle life’s big transitions.