High blood sugar can lead to fatigue and dehydration, and over time, this can lead to a long list of health problems, including heart disease. Mixing in portions of protein and fibers helps to stabilize blood sugar and protein foods are broken down into their amino-acid building blocks during digestion.

Mood-Boosting Foods

A diet that includes high levels of folate and other B vitamins has been proven to boost mood. Folate is found in high amounts in dark leafy greens and vegetables (spinach, endive, kale, asparagus and broccoli), and some beans carry even denser measures of folate. B12 is a potent booster of mood and is found in meats, fish, poultry and dairy. One B-complex vitamin choline, synthesized in the brain as the neurotransmitter acetylcholine, has been linked to memory and concentration. There appears to be a relationship between a shortage of acetylcholine and Alzheimer's disease. Eggs, dairy and cruciferous vegetables are rich sources of choline.

The presence and invasion of oxidants in the body stresses its normal functioning, throwing the systems out of balance and affecting mood. Selenium seems to be a potent antioxidant and plays an important role in breaking down foods and for healthy digestion, ensuring that the body absorbs important nutrients. Look for it in whole-grain foods.

The omega-3 fatty acids in fish seem to have a positive effect on everyday mood. Salmon and tuna are fish that are widely available and are good sources of omega 3's.

Research suggests higher levels of vitamin D in the body reduce the probability of mood issues. The body's easy processing of vitamin D comes through sun exposure.