Showing posts with label Whole grains. Show all posts
Showing posts with label Whole grains. Show all posts

Monday, 19 October 2015

Another fallacy promulgated by a certain dietary camp.

High Carb diets are tasteless and monotonous. Steaks, cheeses & butters for the win.
From http://www.slideshare.net/jer04/taiwan-rice-challenge-17671208

If you think that High Carb diets comprise only potatoes, sweet potatoes or rice all day (which some populations actually eat without complaint), then you're mistaken.

Here's a High Carb diet (the food in the picture can sit on top of Basmati rice, if you like).
From http://gluten-free-zen.com/2011/02/13/asian-chicken-wings-vegetable-stir-fry/

Here's another High Carb diet.
From http://bit.ly/1W2fzqh

And another.
From http://www.recipeshubs.com/muesli/18025

And yet another.
From http://www.dreamstime.com/stock-photos-fresh-mixed-fruit-berries-image14688313

The above can be eaten with animal produce, which includes some steaks, cheeses & butters.

Anyone who claims that High Carb diets are tasteless and monotonous has zero imagination.

Monday, 18 August 2014

Dry carbohydrates, wet carbohydrates & energy density.

Karen N Davids thought of it first!
From https://www.amazon.co.uk/Carbs-Weight-Manage-Nutritional-Carbohydrates-ebook/dp/B00DJF2GKU

Here's a list of commonly-eaten carbohydrates and their Energy Density, in kcals/100g. From https://nutritiondata.self.com/

Dry Carbohydrates:-
Bread, White_________________________________________________266
Bread, Multi-grain___________________________________________265
Bread, Rye___________________________________________________258
Bread, Pumpernickel__________________________________________250
Bread, Whole-wheat___________________________________________247
Bread, reduced-calorie, white________________________________207
Bread, reduced-calorie, wheat________________________________198

Wet Carbohydrates:-
Pasta, fresh-refrigerated, plain, cooked_____________________131
Rice, white, long-grain, regular, cooked_____________________130
Rice, brown, long-grain, cooked______________________________111
Peas, green, frozen, cooked, boiled, drained, with salt_______78
Beans, kidney, red, mature seeds, cooked, boiled, with salt__127
Lentils, mature seeds, cooked, boiled, with salt_____________114
Vegetables, mixed, frozen, cooked, boiled, drained, with salt_60
Broccoli, frozen, spears, cooked, boiled, drained, with salt__28
Sweet potato, cooked, baked in skin, with salt________________92
Potatoes, boiled, cooked in skin, flesh, with salt____________87
Grapes, red or green (European type), raw_____________________69
Cherries, sweet, raw__________________________________________63
Pears, raw [Includes USDA commodity food A435]________________58
Apples, raw, with skin________________________________________52


If a diet is high in carbohydrates:-
Which of the above foods are most likely to result in weight gain?
Which of the above foods are most likely to result in weight loss?
Answers on a postcard, please!

Monday, 4 August 2014

Historical perspectives on the impact of n-3 and n-6 nutrients on health, by Bill Lands.

Here's Fig. 1. from http://www.sciencedirect.com/science/article/pii/S0163782714000253
Relating tissue HUFA balance with blood cholesterol and heart attacks. Results from the 25-year follow-up in the Seven Countries Study [35] were discussed in an earlier review [10] which noted that “Food energy imbalances which elevate blood cholesterol may be fatal only to the degree that omega-6 (n-6) exceeds omega-3 (n-3) in tissue HUFA. Such evidence raises questions about the hypothesis that blood cholesterol levels cause CHD.” Northern Europe and Southern Europe have abbreviations “No.” and “So.”, respectively. The Figure is reprinted with permission of the publisher.

Hat-tip to Dr. Thomas Dayspring for Tweeting this review.

Fig. 1 is interesting, as it shows a significant association between 25-year CHD mortality and Serum Total Cholesterol for every region except Japan. What's different about Japan, compared to Northern Europe, USA, Serbia, Southern Europe & Crete?

According to Measuring Blood Fatty Acids as a Surrogate Indicator for Coronary Heart Disease Risk in Population Studies , Philippines & Iceland have lower % linoleic acid than Japan. Where's the CHD vs TC data?

Could another difference be that the Japanese eat rice, a relatively intact grain, instead of foods made from wheat grain dust (i.e. flour) as their main source of dietary carbohydrates?

See also Using 3–6 differences in essential fatty acids rather than 3/6 ratios gives useful food balance scores , and Omega 3-6 Balance Score.

Sunday, 5 May 2013

Green vegetables, red meat and colon cancer: chlorophyll prevents the cytotoxic and hyperproliferative effects of haem in rat colon.

I've just had a long and fascinating telephone conversation with Jay Bryant. This has inspired me to write three new blog posts. This is the first. There's a recurring theme.
Om, nom, nom!
Lions are obligate carnivores, which means that they must eat meat. Wild lions also eat processed carbohydrates. Wait, WHAT?!?! The word "processed" has bad connotations. However, it merely means "having undergone a process", without specifying what the process is.

Lions tear open the stomachs of their prey. The contents spill out and some are consumed by the lions. What do herbivores eat? Green vegetable matter. Being chewed by the molars of a herbivore is technically-speaking food processing. So, on to the study in the title.

See Green vegetables, red meat and colon cancer: chlorophyll prevents the cytotoxic and hyperproliferative effects of haem in rat colon.

"In both studies haem increased cytotoxicity of the colonic contents approximately 8-fold and proliferation of the colonocytes almost 2-fold. Spinach or an equimolar amount of chlorophyll supplement in the haem diet inhibited these haem effects completely. Haem clearly inhibited exfoliation of colonocytes, an effect counteracted by spinach and chlorophyll. Finally, size exclusion chromatography showed that chlorophyll prevented formation of the cytotoxic haem metabolite. We conclude that green vegetables may decrease colon cancer risk because chlorophyll prevents the detrimental, cytotoxic and hyperproliferative colonic effects of dietary haem."

It's a rat study (experiments on humans are unethical), but there's Heme and Chlorophyll Intake and Risk of Colorectal Cancer in the Netherlands Cohort Study. Finally, there's Associations between Red Meat and Risks for Colon and Rectal Cancer Depend on the Type of Red Meat Consumed.

So, always eat greens with your red meat. A tablespoonful of cooked spinach is all you need.

EDIT: I just found Red meat and colon cancer: should we become vegetarians, or can we make meat safer?

"For instance, promotion of colon carcinogenesis in rats by cooked, nitrite-treated and oxidized high-heme cured meat was suppressed by dietary calcium and by α-tocopherol, and a study in volunteers supported these protective effects in humans."

As dietary calcium binds to haem iron, this suggests that other binding agents would work e.g. phytates (in whole grains) and tannins (in tea).

α-tocopherol is a fat-based antioxidant. Vitamin E supplements contain D α-tocopherol.

Saturday, 13 February 2010

The problem with "Wholegrain" cereals etc.

As I mentioned in Carbohydrates: Dogs' Doodads or Spawn of Satan?, some breakfast cereals turn into blood glucose faster than table sugar (half glucose bonded with half fructose) even though they're "Wholegrain" cereals.

A whole (i.e. intact) grain consists of a protective outer shell (a.k.a. bran) and innards consisting of starchy/proteiny endosperm and nutritious germ. See Cereal germ.

To turn a grain into a breakfast cereal, it's milled into dust, mixed with water to form a paste and the paste is extruded through holes into whatever shape the manufacturer desires. Technically, everything that was in the whole grain is in the finished product. However, the form and function have completely changed. Here are a couple of analogies.

1) I want to sell my car. I take it to a scrap-yard and have it shredded into tiny pieces. All of the tiny pieces are put in a skip, which is delivered to my driveway. I place a sign on the skip stating "Whole Mazda MX-5 for sale. Enquire within. £5,000 O.N.O.". What would you offer for my "Whole Car"?

2) An insane person gives me £5,000 (in £50 notes) for my "Whole Car". As I'm on a roll, I take the notes and put them through a cross-cut shredder which turns them into thousands of 2mm x 2mm pieces. I empty the pieces into an attaché case. Who will accept my attaché case full of "Whole £50 notes" as payment for their second-hand car? Any more insane people out there?

Roller-milling grains into fine dust does four things.

1) It exposes the starchy endosperm.

2) It greatly increases the surface area to volume ratio of the grain, resulting in faster digestion and absorption. Surface area to volume ratio is inversely proportional to particle size. If 3mm grains are roller-milled into 0.1mm particles, the surface area to volume ratio is 30 times bigger. See Particle size, satiety and the glycaemic response. Therefore, "wholegrain" breads made from roller-milled flours are as bad as white breads, in terms of glucose and insulin response. Choose wholemeal breads made from stone-ground flours, as the particle size is bigger.

3) It makes the finished product much more likely to stick to your teeth, resulting in the rapid formation of plaque that damages your teeth and gums.

4) It makes the finished product more energy-dense.

Rolled grains are grains that have been steamed (to cook and make them soft), then put through what's effectively a mangle. They're still intact, if somewhat flat. Puffed grains are grains that have been heated to make the water within boil. As steam takes up a much larger volume than water, the grains are inflated to a much larger size. They're still intact, if somewhat funky-looking!

Don't be conned by breakfast cereal labels. If they look like "O"s or Brillo pads or brake pads, they're not intact grains.

Oats are O.K. even when turned into oatmeal, probably due to their high beta-glucan content, which forms a wallpaper paste-like goo when wet. See Particle size of wheat, maize, and oat test meals: effects on plasma glucose and insulin responses and on the rate of starch digestion in vitro.

See also Anthony Colpo's The Wholegrain Scam.