Archive for September, 2006

Sleep and obesity

Saturday, September 30th, 2006

Another study showing the relationship between chronic lack of sleep and obesity. Shift workers have higher a higher incedence of obesity as well. There may be a stress connection here. Sleep deprivation increases cortisol, a known appetite stimulant. Abstract

Larger meals result in underestimation of calories

Friday, September 29th, 2006

Underestimation of calories is one of the major causes for discrepencies between like studies. It seems that larger meals are more difficult to estimate and more likely to be underestimated by both obese and normal weight people. Smaller meals where estimated with a much high accuracy. The researchers concluded that ...

Personality characteristics in obesity

Thursday, September 28th, 2006

Obese subjects scored higher in novelty seeking and lower in persistance. Those who were successful in weight loss scored lower in novelty seeking. To me, this suggests a relationship between obesity and low levels of the neurotransmitter dopamine. Dopamine is partially responsible for drive (persistance) and pleasure (novelty seeking). Dopamine is ...

Cissus effective for weight loss

Wednesday, September 27th, 2006

Cissus quadrangularis, a medicinal plant from India, appears to be effective for weight loss. The following study showed cissus lowered body weight and abdominal fat, as well as in fasting blood glucose, total cholesterol, LDL-cholesterol, triglycerides and C-reactive protein. Abstract

Glycemic Index and Glycemic Load both Correlate with BMI

Tuesday, September 26th, 2006

Some recent studies have suggested that the glycemic index and glycemic load are not important. The following study shows that this is due to under-reporting of food intake. Positive association where found between GI, GL, and BMI. Obese subjects are highly likely to under report their energy intake. Studies that ignore this ...

Obese men have lower testosterone

Monday, September 25th, 2006

This study out of Mexico shows the negative relationship between obesity and testosterone levels. SHBG was also lower and insulin higher in the obese group. Fat cells are more metabolically active than once thought and produce many inflammator factors and some hormones...including estrogen metabolites. This, in combination with reduced androgen levels, ...