The Switch: Ignite Your Metabolism With Intermittent Fasting, Protein Cycling, and Keto by James W. Clement & George M. Church

Author:James W. Clement & George M. Church
Language: eng
Format: mobi
ISBN: 1982115394
Publisher: Gallery Books
Published: 2019-12-31T00:00:00+00:00

THE ABSENCE OF DAIRY PRODUCTS, GRAINS, PROCESSED SUGARS, VEGETABLE OILS, AND ALCOHOL IN EARLY DIETS

According to Colorado State University Professor Emeritus Loren Cordain, who is often credited as being a founder of the modern “paleo movement,” implements for grinding cereal grains first appeared in the Upper Paleolithic, from about 40,000 to 12,000 years ago, but evidence of the regular and sustained exploitation of cereal grains by any worldwide hunter-gatherer group arose with the emergence of the Natufian culture in the Levant in the eastern Mediterranean region about 13,000 years ago.11 Animals were not domesticated before 11,000 to 10,000 years ago, but there isn’t reliable evidence of milk being collected for consumption before 6,000 years ago. Honey appears to have been a small part of any hunter-gatherer’s diet, and crystalline sucrose production from sugarcane didn’t appear until about 2,500 years ago, in India. Olive oil was one of the first man-made oils, dating back to about 6,000 years ago. Other oils for consumption were virtually unheard of until the Industrial Revolution of the late 1800s made processing on a mass scale feasible. The first fermentation of wine likely occurred about 7,500 years ago, and the brewing of cereal grains into beer first took place about 4,000 years ago. Distilling of alcoholic beverages didn’t occur until about 1,200 years ago. As you can see, these food sources, which collectively make up nearly three-quarters of current American calorie intake, were only recently introduced into our diets, and it’s unlikely that most of us have genetically adapted to these foods.

Bear in mind that the transition from a hunter-gatherer dietary lifestyle has varied geographically and wasn’t the norm in northern Europe, England, or Scotland until about 2,000 to 1,500 years ago. Furthermore, refined carbohydrates, grain-fed animals, and simple sugars, all now in abundance in Western diets, have been widely available for only 100 to 150 years. No one’s going to argue that that’s enough time for people to have adapted to these foods.

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