Research

Hormonal

A mixed herbal preparation containing Yerba Mate, Guarana, and Damiana (YGD) significantly delays gastric emptying and induces weight loss in overweight patients over 45 days.

Take three capsules of a Yerba Mate, Guarana, and Damiana blend 15 minutes before your main meals. In a 45-day trial, this led to an average 5.1 kg weight loss in overweight individuals without requiring them to change their diet. The effect appears to work by slowing down how fast your stomach empties, making you feel full sooner. Long-term use (12 months) stabilized weight without further loss or gain.

ModerateSupportsMEDIUM confidence
The herbal preparation, YGD capsules, significantly delayed gastric emptying, reduced the time to perceived gastric fullness and induced significant weight loss over 45 days in overweight patients treated in a primary health care context.
T Andersen et al. · Journal of Human Nutrition and Dietetics · 2001

Why this rating

The study uses a double-blind placebo-controlled design but has a small sample size (n=47 for the main trial) and short duration (45 days).

Source

Weight loss and delayed gastric emptying following a South American herbal preparation in overweight patients

T Andersen et al. · Journal of Human Nutrition and Dietetics · 2001

DOI 10.1046/j.1365-277x.2001.00290.x

rct · n=47Cited 195×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →