GSE, Over 80 Labs Find it Safe and Effective

"Grapefruit Seed Extract" by Allan Sachs, DC, CCN.

"Grapefruit Seed Extract" by Allan Sachs, DC, CCN.


According to Allan Sachs, DC, CCN, in his book, “ The Authoritative Guide to Grapefruit Seed Extract”, GSE is a broad spectrum product that has the ability to work against a wide range of organisms. Hundreds of laboratory tests have shown it is powerful and effective against dangerous germs even when highly diluted. An Acute Oral Toxicity Study done at Northview Pacific Labs showed that GSE is safe and non-toxic even at doses exceeding 5000 mg per kg of body weight. This is equivalent to a 200 pound (90 kg) person  drinking one pound (454 gms) of pure GSE daily for two weeks. Typical doses of GSE (used in people) have no negative impact on beneficial gut bacteria.


Although we’re still learning about the use of GSE in the care of birds, we know that it is effective in cleaning cages, enclosures and perches, and for disinfecting bird toys obtained at bird marts.  It can also be used to sterilize the hands before touching parrot babies or hand-feeding them, for disinfecting surfaces, equipment and utensils in the nursery, brooders and incubators, and in the final rinse when laundering the cloth bedding for newly-hatched chicks.  For healing, Leslie prepares personalized individual formulas for healing aspergillosis, candida, and reoccurring bacterial infections in parrots.


For more information on GSE, go to What is Grapefruit Seed Extract (GSE)?


GSE has been well researched, more than 80 scientific laboratories have performed hundreds of studies on its effectiveness. A partial list of these labs appears below. This list originally appeared in “ The Authoritative Guide to Grapefruit Seed Extract”, by Allan Sachs, DC, CCN, on pages 33 to 34.


GSE Laboratories

ABC Research, Gainesville, Florida

Abcom Chemie Co, Seoul, Korea

Alpha Chemical and Biomedical Laboratories, Petaluma, California

AquaLandis Inc, Canada

Analytical Chemical Services Inc, Columbia, Maryland

Association of Consulting Chemists and Chemical Engineers

Bioassay Systems Corp, Woburn, Massachusetts

Bio-Research Laboratories, Redmond, Washington

Brigham Young University, Provo, Utah

British Columbia Research Corp, Vancouver, BC, Canada

Coopemontecillos Division Pesca, San Jose, Costa Rica

Daiwa Kasei Chemical, Tokyo, Japan

Department of Health and Human Services, FDA, Washington DC

Department of Food Technology, Gycongsang National University, Chinju, Korea

East Chilliwack Agricultural Co-op, Chilliwack, BC, Canada

Great Smokies Labs, Asheville, North Carolina

Florida Department of Agriculture, Tallahassee, Florida

Hazelton Labs, Madison, Wisconsin

Hilltop Research Inc, Huntington Valley, Pennsylvania

Indonesian Government at the National Center for Fisheries, Jakarta

Institut Pasteur, Paris, France

Journal of Food Sciences

Journal of the Korean Agricultural Chemical Society

Journal of Orthomolecular Medicine

Lancaster Laboratories, Lancaster, Pennsylvania

Northview Pacific Labs, Berkeley, California

Silocon Valley Chemlab Inc, Santa Clara, California

Thornton Laboratories Inc, Tampa, Florida

US Dept of Agriculture, Hyattsville, Florida

United States Testing Co, Hoboken, New Jersey

Universidad Autonoma de Nuevo Leon, San Nicolas de los Garza, Mexico

Universidad National Mayor de San Marcos, Lima, Peru

University of California, Davis, California

University of Florida, Food Services Dept, Gainesville, Florida

University of Nebraska

University of Southern Florida, Dept of Biology, Tampa, Florida

Valley Microbiology Services, Palo Alto, California

Weston-Gulf Coast Laboratories, University Park, Illinois





For more information on GSE, go to What is Grapefruit Seed Extract (GSE)?



We hope this article helped shed some light on the ‘on-line’ GSE controversy. Tell us your thoughts and questions about using GSE with your birds.


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