Weight reduction and maintenance with IQP-PV-101: a 12-week randomized controlled study with a 24-week open label period

Obesity (Silver Spring). 2014 Mar;22(3):645-51. doi: 10.1002/oby.20577. Epub 2013 Sep 5.


Objective: The safety and efficacy of IQP-PV-101, a proprietary extract of Phaseolus vulgaris, on weight management in two phases was evaluated here. The weight loss (WL) phase was conducted over 12 weeks and the weight maintenance (WM) phase took 24 weeks.

Methods: In the double-blind WL phase, subjects were randomized to receive either IQP-PV-101 or placebo. All subjects adhered to a mildly hypocaloric diet. Body weight and other body composition parameters were measured at baseline and every 4 weeks thereafter. During the single arm, open label WM trial, energy intake was ad libitum. Efficacy parameters were measured at baseline, week 12 and week 24.

Results: At the end of the WL study, the IQP-PV-101 group lost a mean of 2.91 ± 2.63 kg in body weight compared with 0.92 ± 2.00 kg in the placebo group (P < 0.001). During the WM phase, 36 out of 49 subjects (73.5%) were able to maintain their weight, even without dietary restrictions. No serious or related adverse events were reported over the combined period of 36 weeks.

Conclusions: Results indicate that IQP-PV-101 is safe and effective for weight loss and maintenance.

Trial registration: ClinicalTrials.gov NCT01233349 NCT01435278.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Body Composition
  • Body Mass Index
  • Diet, Reducing
  • Double-Blind Method
  • Energy Intake
  • Female
  • Follow-Up Studies
  • Germany
  • Humans
  • Male
  • Meals
  • Middle Aged
  • Obesity / drug therapy
  • Phaseolus / chemistry*
  • Plant Extracts / pharmacology*
  • Waist Circumference
  • Weight Loss / drug effects*
  • Young Adult


  • Plant Extracts

Associated data

  • ClinicalTrials.gov/NCT01233349
  • ClinicalTrials.gov/NCT01435278