Effect of Low-Energy-Dense Diet Rich in Multiple Functional Foods on Weight-Loss Maintenance, Inflammation, and Cardiovascular Risk Factors: A Randomized Controlled Trial.

Background: There are no investigations regarding the effects of consuming low-energy-dense diets rich in multiple functional foods on weight-loss maintenance, inflammatory markers, and cardiovascular disease (CVD) risk factors simultaneously.

Method: This randomized controlled trial design was conducted on 90 men and women who were under a previous weight loss diet. Three months of intervention with recruitment at Allzahra Hospital, Isfahan, Iran, was done. Intervention was conducted following achieving 7-11 kg weight loss. Participants were encouraged to consumed these three: an isocaloric control diet (50% of energy from carbohydrate, 35% from fat, 15% from protein), a low-glycemic-index diet (LE) (60% from carbohydrate, 25% from fat, and 15% from protein), and a low-glycemic-index diet rich in multiple functional foods (LE + FF) (60% from carbohydrate, 25% from fat, and 15% from protein). Fasting blood glucose, serum insulin level, lipid profiles, inflammatory markers, adiponectin, systolic and diastolic blood pressure, and anthropometric measurements were assessed using standard guidelines.

Results: The percent changes of weight, waist, and body mass index (BMI), systolic and diastolic blood pressure, malondialdehyde (MDA), high-sensitivity C-reactive protein (hs-CRP), tumor necrosis factor (TNF) α, total cholesterol, low-density lipoprotein (LDL) cholesterol, triglyceride, and fasting blood glucose (FBS) were substantially more decreased in the LE + FF group compared to the LE and control groups (p ≤ 0.03). Percent change of adiponectin among the LE + FF group was significantly more enhanced (7.29 ± 0.10) compared with the LE group (1.28 ± 0.20) (p = 0.001). Significantly more increment in the percent change of total antioxidant capacity (TAC) (6.91 ± 0.10) was obtained among the LE + FF group compared to the LE group (1.79 ± 0.04).

Conclusions: This study provides established evidence supporting the beneficial effects of a low-energy-dense diet rich in multiple functional foods diet on improving weight-loss maintenance, inflammation, and cardiovascular risk factors.