ch. 1. Mental energy and fatigue : science and the consumer / Harris R. Lieberman -- ch. 2. Hydration and brain function / Kristen E. D'Anci -- ch. 3. Diet as an analgesic modality / Alexis M. Codrington, Yoram Shir, and John Pereira -- ch. 4. Breakfast and adult and children behaviors / Andrew P. Smith -- ch. 5. Diet, physical activity, and substrate oxidation : implications for appetite control, weight loss, and body composition / Mark Hopkins, Neil A. King, and John E. Blundell -- ch. 6. The reward deficiency hypothesis : implications for obesity and other eating disorders / Brenda M. Geiger, Erin N. Umberg, and Emmanuel N. Pothos -- ch. 7. Potential consequences of obesity on cognitive behavior / Nicole A. Jurdak and Robin B. Kanarek -- ch. 8. Dietary supplements for weight loss / Igho Onakpoya and Edzard Ernst -- ch. 9. Sweet taste preferences and cravings in gestational diabetes mellitus (GDM) : implications for diet and medical management / Beverly J. Tepper. [et al.] -- ch. 10. Homocysteine, B vitamins, and cognitive function / Joshua W. Miller -- ch. 11. Creatine, brain functioning, and behavior / Patricia J. Allen, Kristen E. D'Anci, and Robin B. Kanarek -- ch. 12. Theanine, mood, and behavior / Jessica E. Smith and Peter J. Rogers -- ch. 13. Caffeine : practical implications / Andrew P. Smith -- ch. 14. Caffeine effects on aggression and risky decision making / Caroline R. Mahoney, Tad T. Brunye, and Grace E. Giles.