Evaluation of an Eight-Week Whole-Food Plant-Based Lifestyle Modification Program

Nutrients. 2019 Sep 3;11(9):2068. doi: 10.3390/nu11092068.

Abstract

Poor diet quality is the leading cause of death both in the United States and worldwide, and the prevalence of obesity is at an all-time high and is projected to significantly worsen. Results from an eight-week group program utilizing an ad-libitum whole-food plant-based dietary pattern, were reviewed. There were 79 participants, all self-referred from the community, including 24 (30.4%) who were already vegetarian or vegan at baseline. Seventy-eight participants (98.7%) completed the eight-week program. Among completers, those with higher BMI at baseline lost a larger percentage of their body weight (total body weight loss of 3.0 ± SD 2.1%, 5.8 ± 2.8%, and 6.4 ± 2.5% for participants who had baseline BMI in normal, overweight, and obese range, respectively). The average weight loss for all the completers was 5.5 ± 3.0 kg (p < 0.0001). Final blood pressure and plasma lipids were reduced compared to baseline (SBP decreased 7.1 ± 15.5 mmHg (p = 0.0002), DBP decreased 7.3 ± 10.9 mmHg (p < 0.0001), total cholesterol decreased 25.2 ± 24.7 mg/dL (p < 0.0001), LDL decreased 15.3 ± 21.1 mg/dL (p < 0.0001)). Twenty-one (26.9%) participants were able to decrease or stop at least one chronic medication compared to two (2.6%) participants who required an increased dose of a chronic medication. Participants who were already vegetarian or vegan at baseline experienced statistically significant weight loss and reductions in total and LDL cholesterol. There was a non-significant trend toward less weight loss in these participants compared to participants who were non-vegetarian at baseline. Reductions in total and LDL cholesterol were not significantly different when comparing vegetarian or vegan and non-vegetarian participants. A whole-food plant-based dietary intervention may provide significant short-term benefits for both non-vegetarian, vegetarian, and vegan individuals.

Keywords: hypercholesterolemia; hyperlipidemia; hypertension; low-fat diet; plant-based diet; vegan diet; vegetarian diet; weight loss.

MeSH terms

  • Adult
  • Aged
  • Antacids / administration & dosage
  • Antihypertensive Agents / administration & dosage
  • Blood Glucose
  • Blood Pressure*
  • Body Weight
  • Cholesterol / blood
  • Diabetes Mellitus, Type 2 / blood
  • Diet, Vegetarian*
  • Dietary Fats
  • Energy Intake
  • Female
  • Gastroesophageal Reflux / drug therapy
  • Gastroesophageal Reflux / prevention & control
  • Humans
  • Hypoglycemic Agents / administration & dosage
  • Life Style*
  • Male
  • Middle Aged
  • Triglycerides / blood
  • United States

Substances

  • Antacids
  • Antihypertensive Agents
  • Blood Glucose
  • Dietary Fats
  • Hypoglycemic Agents
  • Triglycerides
  • Cholesterol