"Let food be thy medicine, and medicine be thy food." - Hippocrates Do your meals leave you feeling light and full of vitality, or do they weigh you down, making you feel sleepy and dull? Although all food supplies calories, how well your body utilizes those calories to provide you with energy depends on the "life force" in the foods you eat. And foods vary widely along a continuum in this respect, from producing vitality, rejuvenation and healing to sapping your energy, adding unwanted weight and contributing to premature aging and disease.Food also influences mood and mental abilities, from raising your spirits, making you optimistic and heightening your awareness and mental function to bringing you down and dulling your brain.A number of factors determine a food's vibration or life force. Overall, foods are most energizing and health-promoting when they're consumed raw, or as close as possible to their natural state. This gives pride of place to the multicolored fruits and vegetable…