The Primal/Paleo Controversy
07.21.2009
One of the greatest resources for the paleo/primal lifestyle is Loren Cordain's book, The Paleo Diet.
Many say that his book started the hunter-gatherer, Paleolithic, ancestral, or primal "revolution" as he outlined optimal and non-optimal foods. His very basic points include:
- Our ancestors ate lean meats, seafood, vegetables, fruits, and nuts.
- It is only in the last 10,000 years or so that humans started to not eat these foods. Most of today's diets include 70% grains, dairy, legumes, and sweets.
- We are not genetically adapted to eat these other "foods" and should therefore go back to eating the way we did in the Paleo era.
- Today's diets are not dense in nutrients. Vegetables have almost twice as many nutrients as grains. As Cordain states: "Grains can't hold a micronutrient candle to fruits and vegetables."
- Grains and dairy, although wholesome in some ways, are also highly allergenic.
- Eating meats, seafood, vegetables, fruits, and nuts reduces cardiovascular disease, cancer, diabetes, obesity, osteoporosis, arthritis, and other modern diseases. These premises are easy to understand. Many organizations and experts also agree that we should focus our diets on natural foods. However, this is not to say that this book hasn't caused controversy.
Here are some basic counterpoints to the paleo/primal diet:
- The paleo diet does not provide enough calcium. Milk products should be part of a daily diet.
- Animal fat is not bad, so the idea that one should only eat lean meats is off base.
- It is untrue that Paleo folks did not have carbohydrates or starchy roots. There is evidence of grains being used and tubers being slow cooked.
- Primitive man did indeed eat salt. It could have been obtained from the brine on seacoasts, salt flats, game meat and marsh grasses.
And the controversies do not stop there.
Cordain's other book, The Paleo Diet for Athletes with co-author Joe Friel provides formulas for endurance athletes to maintain a mostly paleo/primal diet. This book has caused debates, as many people believe that you cannot be both primal and an endurance athlete.
The extra fuel burning by athletes requires more carbs to ensure a quick recovery. As Cordain puts it: "Training for endurance sports such as running, cycling, triathlon, rowing, swimming, and cross-country skiing places great demands on the body, and the athlete is in some stage of recovery almost continuously during periods of heavy training. The keys to optimum recovery are sleep and diet. Even though we recommend that everyone eat a diet similar to what our Stone Age ancestors ate, we realize that nutritional concessions must be made for the athlete who is training at a high volume in the range of 10 to 35 or more hours per week of rigorous exercise. Rapid recovery is the biggest issue facing such an athlete. While it's not impossible to recover from such training loads on a strict Paleo Diet, it is somewhat more difficult to recover quickly. By modifying the diet before, during, and immediately following challenging workouts, the Paleo Diet provides two benefits sought by all athletes: quick recovery for the next workout, and superior health for the rest of your life."
The "nutritional concessions" Cordain talks about relate to carbs. Here's a quick overview of carbs and their relation to fat and protein.
- Carbs are used for fuel for active muscles and carbs do not provide as much immediate energy as fat. Carbs are converted to glucose. If your body does not use the glucose, it is converted to glycogen and stored. Glycogen is used in times of exercise and it releases energy quicker than fat, so it is a better energy source for muscles.
- Fat is also used for fuel for active muscles and is the most efficient energy source. Fat should be used as fuel or it is stored.
- Protein is not a primary source of energy, but it can be used to provide some energy if the body is low on carbs. The main function of protein is to build body tissue.
The primal diet of limiting or eliminating grains, legumes, and tubers lowers one's carb intake. This works well when the body is not burning a lot of fuel. However, when the body does burn more fuel, more carbs are needed for energy sources. If you do not have enough glycogen, the body finds other ways to get energy, breaking down stored fat and protein. If you use up your stored protein sources, those must be replaced for your body to recover. Yet most people, especially those who do not eat primal, eat way too many carbs. If those carbs are not used, they are stored as fat.
Many folks are quick to point out that cavemen did not compete in marathons or triathlons. While it is true those events did not exist, archeological studies show that our ancestors had regular vigorous exercise related to hunting and gathering. They were not sitting in cubes 8 hours a day. Many cultures, including the later Tarahumara society, used persistence hunting. Early people were also walking/hiking/running to gather and hunt food, communicate between tribes, and even to hold celebrations.
So where did these cultures find the extra carbs to replenish lost energy stores? Fruits and berries, and in some cases tubers, were available for carbohydrate fuel. Another modern example are the Hazda, current hunter-gatherers in Africa who pick berries, fruit, and dig for tubers. They also collect raw honey and hunt when opportunity knocks.
Some primal folks are completely against endurance sports. They instead prefer to strictly adhere to the paleo/primal fuels and avoid long exercise sessions (usually defined as strenuous exercise lasting more than one hour). Other primal tribes, however, believe in endurance sports and have adapted their diet (adding in more natural carbs at certain times) to meet the increased energy needs.
Neither school of camp is necessarily right or wrong, just as those primals who include dairy or some grains are not right or wrong. The Live Primal mission is to encourage individual research and experimentation with primal lifestyle theories. In the end, we all have to find our own adaptations and what works with our every day lives.
These points and counterpoints will be further explored on this site, and as always, your input is encouraged and welcomed! What works best for you?