Changes made in food intake and activity levels result in the biggest health changes. I have yet to find a pill stronger than shifts in diet and exercise. We all know this to be true. You feel crappy after eating too much at a buffet. You feel great after a walk. Hey maybe you feel great after a huge buffet but you're constipated for two days. Hey maybe your legs are sore after the hill but they feel stronger two days later. We all have experienced how food changes how we feel. We manipulate that on purpose. That greasy burger weighs you down, with a very physical, welcomed slowing. Ice water cools. Chocolate perks you up. What we miss is the long term effects. Some perks are short lived. The grease then slows your blood flow through your brain, so too much can cloud your thinking. It's insidious.
Big change in food habits take days to be noticed in the body. Heck what you ate 12 to 17 hours ago is still in there somewhere. The caffeine buzzes and sugar rushes are noticeable in minutes. Even that lasts...caffeine has a 12 to 15 hour half life in the body. That means that half of the caffeine in your morning coffee is still there when you are trying to fall asleep. The heavier meat fats and proteins linger through the digestion and blood for days.
Change what you eat and you change how you feel. This is an interesting topic to research. I have seen proof in experienced civilizations, like China and India. The knowledge they have gathered over the centuries on what seems to keep us humans healthy is succinctly presented in traditional medicines. Human Epidemiological studies reflect these patterns. Humans who eat more plants and less animals do better. Those with higher fiber and less sugar do better. The only two food groups that have no fiber are meats and dairy. Interesting hey?
There are more books out there on what you should eat than, like, anything else. Why is what should we eat such a conundrum these days? Too much choice in this western world of plenty? I have to mention one book: Michael Pollen's. The one with the big head of lettuce on the front - "In Defense of Food". Well researched yet simplified... Eat Food. Not too much. Mostly plants. Harder than it sounds eh! Well good luck out there, I have a batch of cookies get back to. Must get them out of site. Just one more...