Saturday, April 10, 2010

Very-low-carbohydrate diets and preservation of muscle mass

Nutrition & Metabolism | Full text | Very-low-carbohydrate diets and preservation of muscle mass:

"Although more long-term studies are needed before a firm conclusion can be drawn, it appears, from most literature studied, that a VLCARB is, if anything, protective against muscle protein catabolism during energy restriction, provided that it contains adequate amounts of protein."

Saturday, March 13, 2010

Safflower Oil Reduces Belly Fat

Safflower Oil Reduces Belly Fat: The Clinical Study that Supports the Health Claim:

"Results: Although safflower oil did not lower total body fat, it did reduce abdominal (belly) fat by 2.3 pounds and 4.2 pounds, or an average of 6.3%. It also increased lean muscle mass by an average of 1.4 pounds and 3 pounds. Moreover, it reduced fasting blood sugar levels by 11 and 19 points."

Comparison of energy-restricted very low-carbohydrate and low-fat diets on weight loss and body composition in overweight men and women

Comparison of energy-restricted very low-carbohydrate and low-fat diets on weight loss and body composition in overweight men and women:

This study shows a clear benefit of a VLCK (very low-carbohydrate ketogenic)over LF (low-fat) diet for short-term body weight and fat loss, especially in men. A preferential loss of fat in the trunk region with a VLCK diet is novel and potentially clinically significant but requires further validation. These data provide additional support for the concept of metabolic advantage with diets representing extremes in macronutrient distribution.

Actual nutrient intakes from food records during the VLCK (%carbohydrate:fat:protein = ~9:63:28%) and the LF (~58:22:20%) were significantly different. Dietary energy was restricted, but was slightly higher during the VLCK (1855 kcal/day) compared to the LF (1562 kcal/day) diet for men. Both between and within group comparisons revealed a distinct advantage of a VLCK over a LF diet for weight loss, total fat loss, and trunk fat loss for men (despite significantly greater energy intake). The majority of women also responded more favorably to the VLCK diet, especially in terms of trunk fat loss. The greater reduction in trunk fat was not merely due to the greater total fat loss, because the ratio of trunk fat/total fat was also significantly reduced during the VLCK diet in men and women. Absolute REE (kcal/day) was decreased with both diets as expected, but REE expressed relative to body mass (kcal/kg), was better maintained on the VLCK diet for men only. Individual responses clearly show the majority of men and women experience greater weight and fat loss on a VLCK than a LF diet."

Wednesday, March 10, 2010

Blood Sugar

The Heart Scan Blog:

"83 mg/dl is required to erase the excess cardiovascular risk of blood sugar"

Sunday, January 24, 2010

Saturated fat and cardiovascular disease

Meta-analysis of prospective cohort studies evaluating the association of saturated fat with cardiovascular disease -- Siri-Tarino et al., 10.3945/ajcn.2009.27725 -- American Journal of Clinical Nutrition:

"A meta-analysis of prospective epidemiologic studies showed that there is no significant evidence for concluding that dietary saturated fat is associated with an increased risk of CHD or CVD."