Saturday, June 11, 2011

that diet report thing.

The paleo blogs blew up this week about the US News report on best diets:

http://health.usnews.com/best-diet/best-overall-diets

As amusing as the user stacking on the "did this work for you" is, I need to write just a little bit more on the topic.

USnews states: "Experts took issue with the Paleo diet on every measure. Regardless of what a dieter's goal is—weight loss, heart health, or finding a diet that's easy to follow—most experts concluded he or she is better off looking elsewhere."

Well, let's take a quick look. A fair amount of analysis has been done on the methodology and suspected .... industry bias... of this report. So I'm just going
to hit a few high points:

http://health.usnews.com/best-diet/paleo-diet


How's the paleo diet for your heart?

USnews: "While some studies have linked Paleo diets with reducing blood pressure, bad “LDL” cholesterol, and triglycerides (a fatty substance that can raise heart disease risk), they have been few, small, and short. And all that fat would worry most experts."

Okay. Let's parse this. The studies there ARE show the paleo diet can be linked to lowering blood pressure, ldl cholesterol, and triglycerides.

So the experts worry that it's unsafe because it's got too much fat.


Logic?


USnews on health risks:

"By shunning dairy and grains, you’re at risk of missing out on a lot of nutrients. Also, if you’re not careful about making lean meat choices, you’ll quickly ratchet up your risk for heart problems."

Which nutrients exactly? If you look into the vegan diet (same review) and poke around a bit, you find piles and piles of sources for replacements or improvements on every nutrient class. Leaving out the beans, soymilk, and tofu that form the basis of the vegan Way, we have complete animal sources of protein, vitamin D, and other nutrients.

Lean meat choices? See the first point. "all that fat" has been proven in the existing studies to NOT be a problem.



In the section "analyzing" how well the Paleo diet conforms to accepted guidelines, note the first thing is the fat:

"Fat. At about 39 percent of daily calories from fat, a sample Paleo menu exceeds the government’s 35 percent cap by a bit."

All this scare about fat, over 4%? 4%!?!?.


Okay, note that the report couldn't find a way to come down on salt. Paleo wins on balancing the sodium intake.

Fiber- well, veggies. fiber. Got it.

The potassium intake on the paleo diet is high enough to actually be used as a reason for the paleo diet to work. Not the only reason, but it's tops on many nutrients like potassium without supplements.

USnews on Vitamin B12:

"Vitamin B-12. Adults should shoot for 2.4 micrograms of this nutrient, which is critical for proper cell metabolism. You’ll have no trouble meeting the recommendation—fish and meat are B-12 powerhouses."

USnews on Vitamin D:

"Vitamin D. You’ll get very little or none, so you’ll either have to supplement (the non-caveman way) or just make sure you spend enough time in the sun to get the 15 micrograms recommended. Some experts suggest five to 30 minutes of sun between 10 a.m. and 3 p.m., twice a week and without sunscreen, to meet the recommendation, according to the National Institutes of Health."

Supplementing vitamin D the caveman way is pretty easy. Lard. The non hydrogenated, natural kind. (from pigs that see sunlight.) We're talking tablespoons per week here- the ONLY thing that beats it in vitamin D is cod liver oil.

Though, for a paleo man or woman, a couple hours of sunlight a week isn't at all difficult. Because paleo is more than a diet and involves getting outside and moving mass in space (exercise)

And last, on the nutrient list- calcium

USnews:

"Calcium. It’s essential not only to build and maintain bones but to make blood vessels and muscles function properly. Many Americans don’t get enough. Women and anyone older than 50 should try especially hard to meet the government’s recommendation of 1,000 to 1,300 mg. Because you’re not allowed dairy or fortified cereals, you’ll likely only get about 700 mg. from a Paleo menu."


Balls. That's it, just balls.

First, the 1300mg is based on the lower bioavailability of calcium from milk sources. You get something like one and a half to double the amount of bioavailable calcium from non dairy sources. Which means 700mg might not be low, even if it's true.

It's not.

Calcium is available in a wide range of natural sources, once you exclude dairy and those ever-so-healthy "fortified" cereal chem lab experiments. Sardines, salmon, trout- not exotic fish, but inexpensive sources. Kale, spinach, collards- essentially every dark green leafy vegetable will have some significant calcium source.

Not. A. Problem.


Diabetes is often a big issue with dieters these days. I'll leave it to you- look at one of the top rated diets- DASH, and read (carefully) the diabetes section (read more link int he page).

Then read the paleo section.

While the facts are nearly identical, the wording, tone, and phrasing are rather heavily slanted.


For a final comment, I'd like to point out the USnews sees a major issue with the paleo diet in that it requires you to shop in the produce section, and at the meat counter.


you know, where the food is....fresh?


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