Beyond your body's natural biorhythms, another culprit for your afternoon tiredness may stem from a lack of self-care. For instance, if you didn't eat a full breakfast that morning or have a snack in between, it may have set you up for a meeting with the 2:30 feeling. Plus, being jacked up on coffee early on can deplete your energy stores and lead to a crash later in the day. Sugar and caffeine can only work for so long until it zaps your energy (via WebMD).

Make sure that you're getting enough carbohydrates early in the morning to help fuel your muscles and your brain. And for lunch, steer clear of meals high in fat content, as these can take longer to digest and lower your energy levels, as noted by WebMD. On top of getting sufficient fuel, having a consistent sleep schedule may be the best remedy to the 2:30 situation. According to Northwestern University, it's important to avoid empty calories like energy drinks around this time to avoid further disrupting your body's natural energy levels and sleep routine. 

It's only natural that your tired system needs a break in the afternoon. Just because many of us work set schedules doesn't mean that the body has to follow them; remember to prioritize rest and care for your body. These are likely the most powerful antidotes to the afternoon slump.