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In article said:
1) Can a male survive on 1500 calories a day after losing all excess weight? If so, I assume the
metabolism slows down so that not as many calories are needed. Also, recent studies show that
calorie restriction extends lifespan.
It's possible, and depends on where the calories come from, I suppose, but I don't think you could
be terribly active at that level.
Quoted message said:
2) I have read about Metabolic Typing where each individual has a unique metabolism and some are
180 degrees apart as far as what foods should be eaten. How can the Zone be right if there is
some truth to Metabolic Typing?
I doubt the Zone is right for every person. I doubt there is any one way of eating that is best for
everyone. The Zone may be right for lots of folks. It's certainly healthier than a starchy diet,
with its emphasis on good fats and lots of veggies.
Quoted message said:
3) Have there been any formal studies of the Zone diet like there are for the Ornish diet?
There have been no formal studies of the Ornish diet, only a plan that includes smoking cessation,
exercise and meditation. I think they're necessary to overcome the effects of the awful diet,
personally.
There have been studies comparing low fat with low carb diets for weight loss, glycemic control,
glycation reduction and lipid ratios. Lower carb higher fat comes out looking the best as a rule,
despite all attempts at reinterpretation.
Here's an article about one study:
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Blood Glucose Concentration Linked to>Cardiovascular Risk in Nondiabetic Men>
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WESTPORT,>CT (Reuters Health) Jan 04 - Increased glycated hemoglobin (HbA1c)>concentrations are
predictive of cardiovascular mortality among all men,>not only those with diabetes, according to a
report in the
British>Medical Journal for January 6.
Dr. Kay-Tee Khaw and colleagues, from>the University of Cambridge School of Clinical Medicine, UK,
collected>data on all-cause mortality and cardiovascular mortality in 4662 men, 45>to 79 years
of age, who participated in the Norfolk UK cohort of the>European Prospective Investigation into
Cancer and Nutrition>(EPIC-Norfolk). At baseline, from 1995 to 1997, HbA1c was measured and>the
subjects were followed until December 1999.
As expected, Dr.>Khaw's group found that diabetic men had increased mortality for all>causes,
cardiovascular disease and ischemic disease. They also noted that>HbA1c concentrations were
"continuously related to subsequent all-cause,>cardiovascular, and ischemic mortality through the
whole population." The>lowest mortality rates were associated with HbA1c concentrations below>5%.
Further, the group noted that a 1% increase in HbA1c was>associated with a 28% increased risk of
death, which was independent of>age, blood pressure, cholesterol, body mass index and>smoking.
"Eighteen percent of the population excess mortality risk>associated with a HbA1c concentration of
5% or more occurred in men with>diabetes, but 82% occurred in men with concentrations of 5% to 6.9%
(the>majority of the population)," Dr. Khaw and colleagues point>out.
The researchers propose that an elevated concentrations of>HbA1c is a marker for greater absolute
risk among all men, and>"preventive treatment with blood pressure- or cholesterol-lowering
drugs>should be considered in such patients."
They point out that if>the population of nondiabetic men was able to lower its HbA1c>concentration
by 0.1%, total mortality could be reduced by 5%, and if the>concentration could be lowered by 0.2%,
then total mortality could be>reduced by 10% in this population.
--
Susan
