But eventually — probably on day 33 — I started to experiment. First came eating ketchup ... no side effect. Next, I had some red wine ... a slight hangover the next day, but nothing like I used to experience when indulging in sugary cocktails. Then, I added gluten ... and my body officially freaked out. I broke out in a rash and hives all over my scalp, neck, and legs which lasted for a few days. I decided to try eating gluten again after the rashes went away to make sure, and sure enough, I woke up the next day to ... more rashes.
Exercise is a vital part of the live-by-your-genetic-code equation. Surviving in the Stone Age meant a constant on-the-go lifestyle that probably required 4,000-plus calories a day, according to David L. Katz, MD, director of the Yale University Prevention Research Center. Even most people who hit the gym regularly won't need to eat that many calories, but the principle of using food as fuel to exercise still stands.
Paul Burke's Neo-Dieter's Handbook: When We Lost Our Nutritional Roots; Where to Find These Foods Today by Paul Burke M. Ed. The book focuses on nutrition, the right nutrition to enhance health, exercise, weight training, and fitness. The diet consists of lean protein, vegetables, nuts, and fruit. He is opposed to grains. He wants you to stay away from grain-fed meat. The single review at Amazon.com gives the book 5 stars. Published August 21, 2009.
The Carnitine Miracle by Robert Crayhon, M.S. The nutrient carnitine is abundant in red meat. According to Crayhon carnitine helps balance blood lipids and blood sugar levels, maximizes energy levels, increases endurance, eliminates discomfort in ketosis, promotes burning of fat and building of muscle and increases overall well-being. See reviews at Amazon.
Excluding foods. The exclusion of entire categories of commonly eaten foods like whole grains and dairy requires frequent label reading in the supermarket and in restaurants. It may also increase the risk of deficiencies such as calcium, vitamin D, and B vitamins, if these nutrients are not consistently eaten from the allowed foods or a vitamin supplement. For example, there are some nondairy calcium-rich foods that are absorbed well by the body such as collard and turnip greens or canned bone-in sardines and salmon, but you would have to eat five or more servings of these greens and fish bones daily to meet recommended calcium needs. (Note that some greens like spinach that are touted to be calcium-rich also contain oxalates and phytates that bind to calcium so very little is actually absorbed.) One small, short-term intervention study of healthy participants showed a 53% decrease from baseline in calcium intake after following a Paleo diet for three weeks.  Furthermore, the exclusion of whole grains can result in reduced consumption of beneficial nutrients such as fiber and thus may increase one’s risk for diabetes and heart disease.
Participation and sponsorship have grown rapidly since the inception of the Games. The prize money awarded to each first-place male and female increased from $500 at the inaugural Games to $300,000 for 2019. The largest jump in prize money came from the first Games sponsored by Reebok in 2011 when first place went from $25,000 in 2010 to $250,000 in 2011. The total prize payout in 2016 was $2,200,000.
The data for Cordain's book only came from six contemporary hunter-gatherer groups, mainly living in marginal habitats. One of the studies was on the !Kung, whose diet was recorded for a single month, and one was on the Inuit. Due to these limitations, the book has been criticized as painting an incomplete picture of the diets of Paleolithic humans. It has been noted that the rationale for the diet does not adequately account for the fact that, due to the pressures of artificial selection, most modern domesticated plants and animals differ drastically from their Paleolithic ancestors; likewise, their nutritional profiles are very different from their ancient counterparts. For example, wild almonds produce potentially fatal levels of cyanide, but this trait has been bred out of domesticated varieties using artificial selection. Many vegetables, such as broccoli, did not exist in the Paleolithic period; broccoli, cabbage, cauliflower, and kale are modern cultivars of the ancient species Brassica oleracea.
Primal Blueprint Quick and Easy Meals: Delicious, Primal-approved meals you can make in under 30 minutes by Mark Sisson and Jennifer Meier. Every recipe is accompanied by an ingredient list, a nutrient list, clearly written instructions, and a picture of the ingredients and a picture of the finished product. Note that this is a primal book and many recipes include dairy. Published March 25, 2011.
CrossFit is promoted as both a physical exercise philosophy and a competitive fitness sport, incorporating elements from high-intensity interval training, Olympic weightlifting, plyometrics, powerlifting, gymnastics, girevoy sport, calisthenics, strongman, and other exercises. It is practiced by members of over 13,000 affiliated gyms, roughly half of which are located in the United States, and by individuals who complete daily workouts (otherwise known as "WODs" or "workouts of the day"). CrossFit has been criticized for allegedly causing people to suffer from unnecessary injuries and exertional rhabdomyolysis.