Archive for the ‘Hormones’ Category
Tuesday, September 23rd, 2008
Hypothyroidism, or low thyroid output, does not significantly increase overweight and obesity rates. TSH levels in obese and overweight individuals are usually in the normal range. Subclinical hypothyroidism (as indicated by a TSH between 2.51 and 4.0 mU/L) was actually more common than clinical hypothyroidism (TSH above 4.0 ...
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Monday, June 30th, 2008
Levels of adrenal hormones, such as epinephrine and norepinephrine, accurately predict future gains in BMI, waist circumference and body fat levels. An 18-year follow up study found that those having the highest epinephrine responses to the mental stress gained the most weight. Similar results for cortisol have already ...
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Monday, March 3rd, 2008
A large Czech study found that thyroid and adrenal hormones are associated with body fat levels and BMI. A weak association was found between body composition, fat distribution and the hormones of the hypothalamus-pituitary-thyroid-adrenal axis (HPTA).
Higher thyroid hormone levels were associated with improved fat distribution and lower BMI in women. ...
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Wednesday, August 15th, 2007
Respiratory Quotient is a calculation that determines which substrate (fat or carbohydrate) is currently being burned. It is a complex process that involves measuring oxygen inhaled and carbon dioxide exhaled and must be performed in a laboratory.
This study showed that plasma ghrelin (a hunger hormone) is a sensitive marker for ...
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Thursday, June 28th, 2007
Free T3, the more powerful of the thyoid hormones, increases with waist circumference.... which may be an adaptive response to the increased bodyweight.
Many overweight people think that low thyroid output is the cause of their obesity. This is usually not the case. Symptoms of hypothyroidism include low basal temperature, fatigue, ...
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Thursday, May 10th, 2007
An association between stress and obesity has been suggested before. This study shows that it may actually be the excess weight that is causing the elevated blood cortisol levels...not the other way around.
Cortisol liberates fatty acids and glycogen to provide additional fuel when under stress. It also stimulates appetite, like ...
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Wednesday, May 2nd, 2007
Postmenopausal women receiving HRT experienced reduced visceral fat mass as measured by waist circumference. Subcutaneous fat was also reduced and small improvements in waist to hip ratio (WHR) were noted. The subjects did not lose any weight.
The type and delivery method of HRT did not seem to make much difference.
Abstract
Related ...
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Monday, April 30th, 2007
Insulin resistance has a significant affect on body fat distribution, almost as much as testosterone and estrogen. Diabetics represent the highest level of insulin resistance. Type 2 diabetes was associated with less leg fat, more trunk fat, fatty liver and more sub-fascial fat.
Visceral Adipose Tissue (VAT) was also greater in ...
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