Smoothies that provide energy are the ones whose ingredients are packed with healthy complex carbohydrates and plenty of protein.  So if you need an instant physical and mental energy boost without the subsequent "crash" that stimulants and caffeinated energy drinks bring, you should drink energy smoothies.

Drinking energy-giving smoothies before engaging in exercise or physical activity can help to improve your performance.

But there's one thing you need to remember about these smoothies: They are not intended to cure or eliminate chronic fatigue.  This condition is triggered by a deeper problem which needs the attention of a medical professional.

Here are some tasty and easy to prepare smoothies which can help to boost your energy naturally:

1. Banana Cocoa Shake

This is a brown, creamy smoothie that is rich in potassium, fiber, protein and other vitamins and minerals.  It helps to keep you energized and alert.   

The ingredients are:

1 cup frozen banana, cut into pieces

1/2 cup of chilled silken tofu

1/2 cup milk of choice

3 tablespoons of cocoa powder

1 teaspoon flaxseed powder

2. Creamy Jolt

Creamy jolt is creamy, filling energy smoothie which is a combination of banana, pineapple and papaya blended together to keep you energized for a larger portion of your day.  It contains plenty of vitamins, minerals and antioxidants to keep you nourished, energized and protected from cellular damage, cancer and early signs of aging.

Its ingredients are:

1/2 cup banana, cut into pieces

1/2 cup papaya, cut into pieces

1/2 cup pineapple juice (juiced separately)

1 teaspoon brewer's yeast

1 teaspoon flaxseed oil

3. Mango Tango

Mango tango is made from mango – a tropical fruit that is loaded with vitamin C, vitamin A and vitamin E.  These are potent antioxidants which help to protect your body from early aging, eye diseases and cellular damage that can cause cancer.  It also contains phenols, compounds which have powerful antiseptic and antibacterial properties that boost your immune system.  It also contains complex carbohydrates that work to supply your body with energy for hours.

Here are the ingredients:

1 cup frozen mango pieces

1/2 cup low-fat plain yogurt

1/2 cup milk

1 scoop whey protein powder

You can add ground peanuts or any kind of nuts to add to the taste of your smoothie.