Peanuts ftw
Am. J. Clin. Nutr., 2013
A randomized trial on the effects of flavorings on the health benefits of daily peanut consumption
Jones, JB; Provost, M; Keaver, L; Breen, C; Ludy, MJ; Mattes, RD
BACKGROUND: Chronic peanut consumption is associated with health benefits. To encourage consumption, peanuts are marketed with various flavorings, but questions have been raised as to whether seasonings offset the benefits of peanuts alone.
OBJECTIVE: This study sought to determine whether flavorings on peanuts affect health benefits over 12 wk.
DESIGN: In a randomized, parallel-group trial, 151 participants received 42 g peanuts/d as 14-g servings of 3 different flavors (n = 50) or a single flavor (n = 25-26/group). Anthropometric indexes, blood pressure, and heart rate were measured biweekly. Cardiovascular disease risk factors (serum lipids, insulin, glucose, and cortisol) were assessed monthly.
RESULTS: No single added flavor differentially altered body weight, body fat, body mass index, heart rate, or blood indexes in the total sample. Participants at greater risk of cardiovascular disease had significantly greater mean (±SE) reductions in diastolic blood pressure (-5.0 ± 1.7 mm Hg compared with -0.7 ± 0.6 mm Hg), cholesterol (-12.1 ± 8.5 mg/dL compared with +5.6 ± 2.0 mg/dL), and triglycerides (-31.7 ± 15.8 mg/dL compared with +2.3 ± 3.0 mg/dL) (n = 27, 24, and 15 respectively; P < 0.01) than did those at lower risk, who did not have significantly different cholesterol or triglyceride concentrations. Consumption of a variety of flavors led to greater weight gain (0.9 ± 0.3 kg) than did individual flavors alone (0.5 ± 0.2 kg) (P < 0.05), but increases in fat and lean masses were not significant.
CONCLUSIONS: Regardless of flavoring, peanut consumption offered significant benefits to participants with elevated serum lipids and blood pressure. Sensory variety led to a small, but significant, increase in body weight in comparison with ingestion of a single flavor but no change in fat mass. This trial was registered at clinicaltrials.gov as NCT01886326.
More nuts
Regular intake of High-Oleic peanuts improves fat oxidation and body composition in Overweight/Obese men pursuing a Caloric-Restricted diet.
AuthorsAlves RD, et al. Show all Journal
Obesity (Silver Spring). 2014 Mar 18. doi: 10.1002/oby.20746. [Epub ahead of print]
Affiliation
Abstract
Objective: Evaluate the effect of high-oleic and conventional peanuts within a hypocaloric-diet on energy metabolism and body composition. Design and methods: This 4-week randomized clinical trial included males with BMI of 29.7 ± 2.4 kg/m(2) and aged between 18-50 years. Participants were assigned to the groups: control (CT, n=22) that followed a hypocaloric-diet; conventional peanuts (CVP, n=22) or high-oleic peanuts (HOP, n=21) that received the hypocaloric-diet including (not adding) 56 g/day of peanuts. Glucose and fat oxidation, and body fatness and lean mass were the main outcomes. Results: Body weight and composition did not differ between groups. However, within group total body fat (kg) reduced with CVP and HOP, with a significant decrease in body fat percentage in HOP. While total lean mass (kg) decreased in CT, total lean mass (%) increased in HOP. Truncal lean mass decreased in the CT. At baseline, HOP had greater postprandial fat oxidation than the CVP. After 4-weeks, fasting fat oxidation increased in CVP and HOP. Fat oxidation increased in CT and HOP during the 200 minutes after meal intake compared to the fasting condition.
Conclusion: Regular peanut consumption, especially the high-oleic type, within a hypocaloric-diet increased fat oxidation and reduced body fatness in overweigh and obese men.