How do you fight mid-afternoon sleepiness, preferably without chemicals?

Tough: Mid-afternoon sleepiness is experienced to some degree by everyone. The natural circadian rhythm that maintains or wakeful state take a dip in the early afternoon. Some are bothered by it more than others. That with the post-prandial "tide" after eating can make it tough to not feel tired in the early afternoon. Trying to do some light exercise or decreasing carb content during lunch may help.

Afternoon Sleepy: Because of a natural rhythm in our body's systems, it is common to feel a little tired in the mid- to late afternoon. Best thing to do is to be physically active during this time. If you work at a desk, get up, run errands, visit with co-workers, make deliveries. This physical activity will help you from feeling so tired and there are no chemicals involved. Best of both worlds.