[Lee Stewart]

As a general rule of thumb, the lighter the bean, the more caffeine it has. So, a light roast is most likely to wake you up in the a.m. — or carry you through a lull in the afternoon — followed by a medium roast, and lastly a dark roast. As far as the type of coffee, reach for cold brew over iced or drip coffee on particularly groggy mornings. It has the most caffeine.