Archive for the ‘Hormones’ Category
Friday, January 26th, 2007
PCBs are industrial chemicals that were heavily used until they were banned in the US in 1977. Even though they have not been used in 30 years they continue to be measurable in US populations. They have a negative impact on thyroid levels.
PCBs build up in fish, similar to mercury. ...
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Wednesday, January 24th, 2007
Having higher blood levels of leptin (which usually coexists with obesity) makes for quicker weight loss, presumably by appetite suppression. Leptin levels quickly drop as weight is lost, making further weight loss more difficult.
On the bright side, weight loss was associated with higher levels of superoxide dismutase (sod), one of ...
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Thursday, January 18th, 2007
Leptin is part of our bodies complex appetite signaling system. Fat tissue secretes leptin which signals the brain regarding the amount of body fat present. Having high leptin levels may indicate some degree of leptin resistance... which may predict future weight gain. Children at high risk for obesity with high ...
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Monday, January 15th, 2007
Adiponectin is a hormone secreted by fat tissue. Subjects with the metabolic syndrome have lower adiponectin levels than other obese individuals. Adiponectin levels correlated with insulin sensitivity and with HDL cholesterol.
Improving insulin sensitivity should raise adiponectin levels and HDL cholesterol. Weight loss, exercise and omega-3 fatty acids improve insulin sensitivity.
Abstract
Related ...
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Tuesday, January 2nd, 2007
Seven athletes and seven control subjects completed a period of 30 minutes cycling. The athletes had significantly higher growth hormone levels at rest, but both groups experienced elevated growth hormone levels during exercise.
No correlation between growth hormone levels and body composition were found. The researchers concluded it was exercise that ...
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Wednesday, December 20th, 2006
Adiponectin, a peptide hormone that is secreted from fat cells, appears to be part of the fat distribution puzzle. Subjects with higher adiponectin had less insulin resistance and lower waist circumferences. Moderate weight loss did not change adiponectin levels...so the fat distribution signal was still in place.
Injections of adiponectin have ...
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Thursday, December 14th, 2006
Rats given leptin injections had increased fat cell apoptosis (cell death) in both peripheral fat deposits and in bone marrow.
The leptin pathway is more complicated in humans than in rats, but future drugs may be able to partially duplicate this in humans.
Abstract
Related posts:Leptin decreases fat pad deposits independent of norepinephrine
Leptin, ...
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Tuesday, December 12th, 2006
Menopausal women experience a shift in fat distribution from a female pear shape to a more male-like apple shape due to visceral fat accumulation.
It has been speculated that a shift in androgen to estrogen ratio was a principal cause. This was confirmed by this study which showed DHT, the most ...
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