Combine complex carbs with a protein and/or fat for lasting energy. The protein and fat slow the breakdown of sugar into the blood, preventing fatigue. Snacks also can prevent overeating at mealtimes. A few examples of smart snack choices are yogurt with fruit, mixed nuts, veggies with hummus, pears with almond butter, whey protein shake or blueberries with a cheese stick. Plan ahead!

Omega-3 fatty acids

Studies have shown that omega-3 fatty acids reduce inflammation, combat depression and improve mood and memory. Try to focus on omega-3 fats from food rather than supplements. Excellent sources include salmon, tuna, walnuts, flax seeds, leafy greens and hemp seeds.

Magnesium

Almonds, walnuts and Brazil nuts are rich in magnesium, a mineral important in converting carbohydrates into energy. Other good sources of magnesium include whole grains and dark green vegetables.

Don't skimp on calories

Skimping on calories decreases your metabolism and causes you to feel lethargic. Keep your energy levels high and increase metabolism by meeting your caloric needs each day. Whole foods are preferred over supplements to obtain protein, fiber, vitamins and minerals instead of one or two single nutrients. Consume a variety of foods for overall health but also to keep your energy levels high.