Archive for the ‘Hormones’ Category
Monday, December 11th, 2006
ALT is a liver enzyme commonly measured in liver panel lab tests. It also appears to be a marker for insulin sensitivity. It is also a very cheap lab test, compared to oral GTT or HbA1C.
An elevated ALT is associated with reduced insulin sensitivity and glucose tolerance and increased triglycerides.
Abstract
Related ...
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Saturday, December 9th, 2006
Leptin is part of our complex hunger signaling feedback system. Leptin levels are typically high in obese people, but because the signaling is impaired, they may still experience hunger even though body fat levels are high.
Children that were required to fast for diagnostic lab testing experienced a steady fall in ...
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Friday, December 8th, 2006
Obese men were found to have lower levels of total and free testosterone compared to non obese men.
But it is unclear which came first... the obesity or the low androgen levels. Fat cells do produce estrogen, which through a feedback system reduces testosterone levels.
Abstract
Related posts:Obese men have lower testosterone
Testosterone levels ...
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Monday, November 27th, 2006
While leptin and insulin signaling in rodents appear to be much simpler than in humans, it appears that their signaling is improved when the rodents are fed a lower fat diet.
Obviosly the type of fat used is critical. I know omega-3 fatty acids and monounsaturated fats improve insulin signaling and ...
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Wednesday, November 15th, 2006
Metabolic sensing neurons integrate a variety of signals and respond to glucose levels, fatty acids, insulin, leptin and other hormones and their metabolites. The brain uses this data to control appetite and food intake.
Some obese people experience a genetically reduced sensitivity of metabolic sensing neurons. This may be the target ...
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Tuesday, November 14th, 2006
Suppressing testosterone nullifies nearly all of the adaptations to strength training. The group whose testosterone was suppressed did not gain any strength, had only half of the lean mass gain and actually gained fat on the weight training regime.
Heavy weight training usually increases testosterone, but these subjects received medication to ...
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Monday, November 13th, 2006
Norepinephrine stimulates a fat cell to mobilize its fatty acids into the blood stream (lipolysis) to be utilized by the muscles as fuel.
Rats were injected with leptin, which induced a reduction in fat pad size without an increase in norepinephrine, perhaps through a different mechanism.
Leptin is a central part of ...
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Thursday, November 9th, 2006
It is fairly well established that visceral fat is associated with insulin resistance and the metabolic syndrome.
In this large study, waist to hip ratio (WHR) better predicted heart disease risk factors than waist circumference, regardless of BMI. Larger hip circumference (in relation to waist circumference) was protective against heart disease ...
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