Metabolic Type and ER4YT Diets archives

Calling Robert McFerran...

Posted by ami on December 15, 1998 at 12:34:00:


I've been following your comments about following a diet related to your metabolic type and am keen to give this a go. I have searched the archives to try and find out what criteria you use to establish what type of diet is best to try but I can't find anything.

I don't know my blood type but the following is weight is fairly stable give or take 4lbs, I am about 9st 3lbs and 5'7'' in height. My appetite doesn't seem to vary greatly, although I do suffer from sugar lows particularly mid-afternoon and now and then I get cravings for snack food (I think thats related to my sugar lows). On the whole I consider myself to be quite healthy although I do suffer from intermittent bouts of nausea (which is why I am trying to generally make myself a healthier person). I try and eat relatively healthily ie salads. fish, veggies etc (but go through phases where work/social life result in an unhealthy diet!) - I eat meat but hardly ever eat red meat. I drink alcohol about 3 nights a week and if I drink a little bit much (but not necessarily loads) I invariably feel nauseous the next day... I need over 8 hours sleep a night and if I get less feel very sluggish all day. I don't have problems sleeping and never wake up during the night.....thats all I can think of for the moment....

if you need to know my blood type I am sure i can drag it up from somewhere..however, if you feel you can glean what sort of metabolism I have from this then I would be very interested to hear...

could you also let me know when you reckon your book will be available for public consumption as it would be good to have it to hand..

thanks for your help


Follow Ups:

Re: Calling Robert McFerran...

Posted by Robert McFerran on December 15, 1998 at 13:02:19:

In Reply to: Calling Robert McFerran... posted by ami on December 15, 1998 at 12:34:00:


The book probably won't be out until late Spring 98'. The first two sections are in the archive section of this web site. They deal primarily with the 'theory' needed to support what you will be doing as you pursue the protocol.

Here is an excerpt from the protocol section that deals with how to determine metabolic type. Tell me where you think you fall and why.



So how can you tell what metabolism that you have inherited? The best way is to test all three of the different metabolic diets. The diet to which you are metabolically best adapted will give you the most energy.

Dr. Wiley found that approximately 85% of men and 50% of women in America possess an Agriculturist metabolism. More precisely 50% of women will have an Agriculturist metabolism at least during some part of their menstrual cycle. The metabolic nuances of metabolism in women will be discussed later in greater detail.

In many instances a 5 hour glucose tolerance test will reveal your metabolic identity. The test consists of a period of fasting (usually overnight) and then testing for a blood sugar level (or fasting blood sugar level) in the morning. The patient then drinks a sweet, glucose laden, ‘test meal’. Glucose readings are then checked at 30 minutes, 1 hour, 1 ½ hours, 2 hours, 3 hours, 4 hours and finally 5 hours after consumption of the test meal.

A sharp rise in glucose levels followed by an abrupt drop indicates hyper-insulinism (better known as hypo-gylcemia). All individuals with this type of blood glucose curve posses a Hunter-gatherer metabolism. Many physicians will suggest that this type of blood sugar curve is abnormal and that the patient has some sort of carbohydrate intolerance. Nothing could be further from the truth. What the 5 hour glucose tolerance reveals is a metabolic identity.


The Hunter-gatherer that is eating a diet mismatched to their inherited metabolism will experience wild ups and downs in their blood sugar levels. This sort of roller coaster ride exerts a tremendous stress on our physiology. The dramatic drop in blood sugar levels creates hunger, fatigue, loss of strength and mental fog or confusion. Many patients will complain of feeling cold (even when it’s warm) and experience urinary immediacy. In the most severe cases blood sugar can drop to dangerously low levels leading to unconsciousness. Left unattended this condition can lead to a variety of chronic illnesses, including arthritis.

The usual prescription for individuals possessing a hypoglycemic blood sugar curve has been to eat several (5-8) small meals throughout the day. Doctors suggested that these meals consist primarily of foods high in complex carbohydrates. Sugar of any kind should be avoided. The hope was that by eating meals every 2 hours or so that the blood sugar levels of the individual could be buoyed throughout the day. Recently physicians have found that relatively high protein and low complex carbohydrate diets provide more stability to the hypoglycemics blood sugar levels.

Other individuals will show an elevated fasting blood sugar that rises well above normal levels after eating. These higher levels tends to stay elevated over time. This is called a hyper-glycemic or diabetic blood sugar curve. Normally, blood sugar levels begin to drop as the pancreas releases insulin in response to carbohydrate consumption. Physicians believe that this is caused by damage to the insulin producing cells of the pancreas. This is not always the case. Elimination of individual food allergens and the proper metabolic diet will significantly reduce or eliminate the need for supplemental insulin.

95% of all diabetics in America will possess an extreme Agriculturist metabolism. The remaining 5% were previously hypoglycemic (and therefore had inherited a Hunter-gather metabolism). The long term stress of repeated hypoglycemic swings can ultimately results in pancreatic exhaustion and a diab

Follow Ups:

Late Spring '98 --- Guess I missed it!

Posted by RocketHealer Jim++ on December 15, 1998 at 13:55:08:

In Reply to: Re: Calling Robert McFerran... posted by Robert McFerran on December 15, 1998 at 13:02:19:

I assume you meant Late Spring '99 :-) That's soon! Looking forward to it!

Thanks for sharing this section with us again. When you get it to a book, it may be helpful to include not just one, but several graphs and some comparison tables to make this clearer than just the words. Perhaps a (notional) graph comparing blood-sugar levels after eating for H/G and AG types. Perhaps a table comparing what each type should eat and when, and why.

I find it very interesting that hyper-insulinism, often considered abnormal, is actually a metabolic identity. This apparently false (intolerance to carbs) theory has been expounded in enough diet books that many of us believe it and believe that it may be forever changed thru corrected diet (instead of just being the way we are).

Apparently not. I had some good experience early on with The Zone diet when it kept me away from previously obviously bad eating habits, but I now see how that diet probably was not ideal for me, lettuce-wise, a obvious H/G based on your writeup. In fact, I saw where a lot of your forbidden HG foods were what I was living on while Zoning: Cabbage, tomatoes, etc.

My wife, apparently an AG, with insulin-dependent diabetes, did not do well zoning at all. She seems to be able to eat more carbs than I can. Amazing since she is the one with diabetes. Guess I need to buy her a 50 pound bag of brown rice and lots of frozen vegetables to steam. That would not work for me at all, I realize now.

Anyway, thanks for all the help here & sharing parts of your book so we can benefit even before it gets published.

Best Wishes on a speedy publication and on getting Walt to help promote it. As a "starving Doctor", he could probably be "bribed" with a big bag of brown rice, now that we know what he lived on for so long :-)

Follow Ups:

Re: Late Spring '98 --- Guess I missed it!

Posted by Robert P. McFerran on December 15, 1998 at 15:39:47:

In Reply to: Late Spring '98 --- Guess I missed it! posted by RocketHealer Jim++ on December 15, 1998 at 13:55:08:


Thanks for taking time to comment. The book I had intended to write was dramatically changed soon after I started getting feedback from folks actually trying to implement the protocol. It's forced me to really expand the Protocol section. Your suggestion to use plenty of graphs and charts will be a foregone conclusion in trying to make this new way of looking at things (for most) seem more logical.

There is one comment that I wanted to include in regard to looking at the effects of various foods on blood sugar levels -- and that is the impact of food allergies. Dr. Philpott noted the dramatic swings in blood sugar levels that could be induced by the ingestion of certain foods that happened to be a food allergen to that person. That is one reason why I think that folks will get the clearest 'read' of what their true metabolic identity is during the Elimination diet phase of the Protocol.

Of course the individual nature of food allergies and the fact that there is a considerable metabolic spectrum is the main reason why NOBODY can agree on glycemic index values.

If you aren't familiar -- the glycemic index measures the rise in blood sugar after eating a certain food. Well, researchers from all over the world have tried to substanciate the glycemic impact of various foods and they have failed miserably. The problem is that the blood sugar values are all over the place for different individuals.

Someone perceived that things might improve if they just tested and recorded results from Type II diabetics (the group that might benefit the most from this type of study) and the values still showed a wide scatter.

Maybe I'll start referring to the above as 'expert ignorance'. The reason I say this is that there is no primary research in my book and certainly no discoveries beyond what we already know. To make matters worse we've known much of the information a very long time and it has been introduced and re-introduced time and time again.


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