Working all day is demanding, so keeping energized and focused is the key to staying on the ball and bring as productive as possible. Adequate sleep is always helpful, as is properly (and naturally) fueling our bodies so we can deliver our A game from the day's first pitch right through until the final stretch.

Swigging artificial "energy" drinks and munching on sugary candy filled with who-knows-what is not a healthy way to keep your body going strong and your mind sharp. Go natural and not only will you feel great, but your brainpower will be running on all cylinders from dusk 'till dawn.

These 3 all-natural foods will keep your concentration clear and your focus fresh. Plus, they taste great and contain body-boosting benefits. Eat up and perk up for all day alertness and action. It's as easy as A, B, C!

Avocados

If you love guacamole, you're in luck! As per Dr. Axe, "Avocados are packed with monosaturated fats or the "good" kind, keeping blood sugar levels steady." You won't get that dreaded slump other foods can deliver after digestion. In addition, the vitamin K and folate help improve brain cognitive function, working on memory and concentration.

Dice some ripe avocados in your salad or even blend into a creamy smoothie. Avocados will keep your belly full and your brain at its best.

Blueberries

Delicious, full of vitamins, and low in calories, blueberries are the perfect food to keep your mind quick all day long. According to Authority Nutrition, "The antioxidants in blueberries seem to have benefits for the brain, helping to improve brain function and delaying age-related decline."

Dr. Axe adds, "Because of their high levels of gallic acid, blueberries are especially good at protecting our brains from degeneration and stress."

Snack on a handful of nature's candy mid-morning, mix into a cup of yogurt, or bake into a low-fat muffin for an on-the-go breakfast that will keep you on your toes from the brain down.

Celery

Mom always told you to eat your veggies, and she may have been on to something. According to Mercola, "Celery is a rich source of luteolin, a plant compounds that may calm inflammation in your brain, which is a primary cause of neurodegeneration."

Luteolin can also be found in carrots and peppers and help counteract the onset and progression of memory loss. Dice some celery into your salad or fill the middles with peanut butter or cream cheese.

Be sure you're prepped with these office lunch must-haves so you can bring your mind-boosting goodies with you every day.

Munching has never been so good for the mind!