A few quick notes first:
First off, keep in mind that "Nutritionist" is not a legally protected term. Anybody can call themselves a nutritionist without having to know jack shit about nutrition. The protected term is "Dietician". Dieticians are like Dentists, while Nutritionists are "Toothilogists".
Secondly, while Japan is certainly one of the thinnest industrialized nations in the world, obesity rates in Japan are climbing. In fact, they have tripled over the last 40~50 years to about 29% (WHO 2011). JASSO (Japan Society for the Study of Obesity) contributes this rise to the introduction of foods with higher calorie content (especially fast foods), sedentary lifestyles, and irregular eating patterns.
Asia Pacific Journal of Clinical Nutrition: Criteria and classification of obesity in Japan and Asia-Oceania
World Health Organization: Obesity comparison
The only ones who think we know everything, are ironically, typically the most ignorant. We know a lot... a
hell of a lot... but compared to what we don't know, we're still just starting our process of discovery.
Actually, it's quite the opposite. Animals in nature are frequently malnourished, diseased from drinking and eating contaminated food/water, and often riddled with parasites. Further, when placed into a safe environment of plenty, animals will typically display the same over-eating, preference eating, and will suffer many of the same or similar deleterious health effects. (eg, increased rates of cardiovascular damage and diabetes)
Our lifespan in the wild is a scant 25 to 35 years, and actually hadn't changed that much until roughly the advent of the industrial revolution. Today, our average lifespans are between 75 and 90 years depending on which developed nation you live in... noticeably lower in impoverished/exploited nations, and still a pathetic 30 years in some place like Swaziland. While this has mostly been attributed to lowering infant/maternal mortality rates, plentiful food does boost the total. Rates of starvation and malnutrition in contemporary society are far lower than those in modern tribal hunter-gatherer societies.
Secondly, over-eating and the eating of sweet high-calorie foods is written into our very genetic code. Think about it for a moment, when you're living in an environment of high competition and have to hunt for food, you're going to have long periods of scarcity when the game gets away, or a drought ruins the vegetation. We needed those calorie reserves to get us through those periods, but our biology hasn't caught up with our society. Evolution works by selection, so in a way... these changes in our biology won't be effected until more and more people die of these diet related issues - one of the very things you're railing against. Still, it may take quite a while since there's not a great deal of pressure against those traits as they typically develop past reproductive age. You'll probably have a greater exertion of force on it by sexual selection against general overweight bodytypes.
Otherwise, we can either try to exert self-control and mimic the conditions of our ancestors (while still keeping optimal nutrition and food safety) by eating right and exercising often... or we can develop gene therapies to reprogram our biology. Such work is already well underway on several fat-insulin receptors like daf-2.
http://www.sciencemag.org/content/277/5328/942.short
Abstract:
Another area to investigate would be the potential manufacture of a synthetic version of the protein ApoA-1 Milano, or a gene therapy treatment targeted at getting the body to produce this variant of apolipoprotein A1 on it's own by swapping out an amino acid @ R173C. It was a mutation first discovered in a family living in Limone sul Garda in northern Italy who were found to have chronically low HDL levels. What it does is allow the body to effectively remove cholesterol and plaques from the heart, liver, and arterial walls. The family has virtually no history of heart disease despite high risk eating habits.
PDF Endocrinology Rounds: (source starting on page 4)
JAMA: Effect of Recombinant ApoA-I Milano on Coronary Atherosclerosis in Patients With Acute Coronary Syndromes
(Study had a small sample size though, but it's promising)
No, we're not. We're just another creature on this Earth, same as every other creature. We're not special, just highly specialized in one particular trait which happened to have a high degree of utility.
Are arms are not superior to a bird's when it comes to generating lift. Our nails are not superior to a cat's claws when it comes to hunting prey. Our digestive system is not superior to a cow's when it comes to fermenting fibrous vegetative materials. Our lungs and hemoglobin are not superior to a whale's when it comes to extracting, holding, and releasing O2.
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If you want to listen to someone on YouTube who knows what they hell they're talking about on the matter, might I suggest you check out
C0nc0rdance's videos.
High Fructose Corn Syrup - YouTube
Raw Food - YouTube
Raw Food Pt 2 - YouTube
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