Have you ever noticed that breakfast foods are really carb-heavy (looking at you, French toast) and dinner foods are very rich in protein? What’s the deal with that?

Point is: While the standard American diet might make it seem like there’s a particular order to eating certain macros at particular times of the day, the old-school American approach might not be right for everyone—especially if you’re focused on fitness and your physique.

So we asked registered dietitians if the time of the day should influence your macro intake. Unsurprisingly, they suggested that eating right not be as simple as the numbers on the clock. Here’s what they had to say about the best times of day to eat proteins, carbs, and fats.