Dr. Cate said: A minority of cell types actually do require glucose, specifically a few types of cells in the liver and cells without mitochondria (e.g., red blood cells). All other cells work perfectly well burning fat and special kinds of fat-breakdown molecules called ketone bodies. According to world-renowned metabolism expert Dr. Mary Vernon, we need 30 gm (2 Tbsp) of glucose per day to keep those cells that prefer glucose running properly. That small amount can readily be supplied by the conversion of protein to glucose in a metabolic process carried out through a cooperation between the liver and kidney, called gluconeogenesis. Your body requires ZERO grams of dietary carb. What little glucose your body requires (30gm) you can generate yourself from an ounce of protein.
And yes Humans did eat starches and fruits but how much and not processed like now, different now most eat carbs everyday. Fruits were only available IN SEASON while fatty animals all year round, so they wern't eating fruits and starches every day like we are now.Originally Posted by ChocoTaco369 Most traditional societies are high carb. Humanity began and evolved in areas where fruits and starches were common and fatty animals were rare.
Dr. Steve Phinney: Man was eating fish, quail, buffalo. We assume that he ate a lot of protein. In actuality, it appears that what the native people did is to time their hunts, and select the animals they hunted for very high levels of body fat. If you killed a buffalo in the fall or early winter, you killed an animal with a lot of body fat. By the way, they generally hunted in small groups. You might have 15-30 people in a hunting party. An adult cow would weigh around 1,000 pounds. A bull would weigh between 2,000 and 2,500 pounds. Now, suppose it’s, say, October? And the daytime temperatures are way above freezing? What do you do with 1,500 pounds of buffalo, and there are only 15 of you?
Once they killed the buffalo they would pitch their tent and go to work on the carcass. They would skin the carcass and they would work with the skin. They would cut the meat and dry most of it, and they would cut away and save the fat. Within 2 or three days they would have pretty much dealt with the whole carcass. They would take the fat and cook it into liquid fat. They would sew sacks out of part of the hide with the hair on the outside and the rawhide skin on the inside, and they would stuff pounded dried meat into the sacks, and then they would take hot buffalo fat and pour it in to fill in all the air spaces around the meat. Pouring it in hot and then sewing the sack closed with no air killed any bacteria, so when it was cooled, you’d have a solid block of sterilized meat and fat. And that was called pemmican.
Pemmican once it was produced in that way could be transported and stored anywhere from six months to five years. Depending on how the pemmican was prepared and when the buffalo was harvested.
So, for a week after the successful hunt, they and their dogs would be eating from the carcass in that first week. Eating the fresh meat, eating the marrow from the bones, which was both a rich source of calcium and minerals as well as fat. Then they’d pack up and leave with maybe 150 pounds of pemmican. And a human could live on one pound of pemmican per day, as a sustenance food
Basically what they could do, if they killed one buffalo per month, a band of 15 people to 30 people could live on that, carrying the stored food and eating the stored food as they traveled. And if they were very successful and killed 10 buffalo in one month, they would be burdened with 1,000 pounds of food. But that thousand pounds of high energy food could then be used to feed them for a hundred days.