For sure, today's hybridized fruits are tons sweeter & much bigger than ancient fruits. They were smaller, less juicy, more bitter & sour & less sweet.
"Science is not belief but the will to find out." ~ Anonymous
"Culture of the mind must be subservient to the heart." ~ Gandhi
"The flogging will continue until morale improves." ~ Unknown
If you want to see an example of your metabolism change, try eating a few spoons of sugar or some fruit. Very shortly afterward, your pulse will likely speed up in reaction to the sugar. This is an indication of increased metabolism. Our bodies are CONSTANTLY adjusting to the amounts and types of food we give it. Eat very low carb or calorie restrict for a few days or more, and your body will slow down metabolism. This may mean that your temperature slightly decreases, your pulse slows down a bit, or any number of unseen internal processes are put on hold.
This is why those suggestions to 'cut 100 calories a day and lose 10lbs per year' don't work; aside from the fact that calorie intake AND activity levels change every day, the body is very good at lowering it's daily calorie requirement when it senses chronic undereating. This is the reasoning behind calorie cycling; a few days of lower calorie eating to burn off some fat, then a day of normal or higher calories to prevent metabolism from lowering in response.
Uptake of individual fatty acids into adipose tissue in relation to their presence in the diet
The role of dietary fat in adipose tissue... [Public Health Nutr. 2007] - PubMed - NCBI
My n=1 experience supports the eating excess fat = gaining fat scenarios. When I ate ZERO carb, high fat/protein during a 2 week elimination diet (to diagnose a possible fructose malabsorption issue), I gained some fat. I continuted to eat high fat/low carb, kept putting on fat. When i significantly reduced my fat intake and increased carbs, I've started losing some of that fat.
Last edited by BestBetter; 07-22-2012 at 12:59 PM.