Grapefruit Seed
Product Forms
Dose Distribution
Top Brands
Claims on Labels
Common Co-Ingredients
Top-Rated Grapefruit Seed Products
Evidence Summary
Grapefruit Seed Extract (GSE) is primarily researched for its potent antimicrobial and antibacterial properties, particularly in food preservation and industrial applications. While studies demonstrate significant efficacy against various bacteria and fungi, human clinical evidence for therapeutic use is limited.
Evidence by Condition
GSE shows significant efficacy in inhibiting various microorganisms, including foodborne pathogens and multidrug-resistant bacteria.
Artificial GSE products have been linked to adverse effects in patients undergoing warfarin therapy.
Effective Doses
No human clinical trial doses are available from the provided research.
Key Findings
- GSE serves as a natural antibacterial substance against multidrug-resistant bacteria (PMID: 33477436)
- GSE can effectively prevent Pseudomonas spp. contamination in edible mushrooms (PMID: 38672835)
- Artificial GSE products may cause adverse effects in patients on warfarin therapy (PMID: 17468864)
Limitations
The current body of research is heavily focused on food science, microbiology, and veterinary applications, with a significant lack of human clinical trials.
Safety & Interactions
Potential for adverse drug interactions, particularly with warfarin therapy.
AI-generated summary from 7 peer-reviewed studies. Not medical advice. Always consult a healthcare provider.
Claims vs. Evidence
| Claim Type | % of Products | Evidence Required | Status |
|---|---|---|---|
| All Other | 100% | Tier D (Unclassified) | ✅ Supported |
| Structure/Function | 62% | Tier C (DSHEA Structure/Function (no pre-approval)) | ⚠️ Unsupported |
Research by Topic
Research Evidence (7)
**Choi et al., 2014** | J Food Sci | Other Choi Jae-Suk, Lee Yu-Ri, ... Sohn Jae Hak. Antibacterial effect of grapefruit seed extract (GSE) on Makgeolli-brewing microorganisms and its application in the preservation of fresh Makgeolli. J Food Sci. 20...
**Murgia et al., 2024** | Foods | Other Murgia Marcello, Pani Sara Maria, ... Coroneo Valentina. Antimicrobial Activity of Grapefruit Seed Extract on Edible Mushrooms Contaminations: Efficacy in Preventing Pseudomonas spp. in Pleurotus eryngii. Foods...
**Kim et al., 2024** | Int J Food Microbiol | Other Kim Unji, Oh Se-Wook. Antimicrobial resistance induction potential of grapefruit seed extract on multi-species biofilm of E. coli in food industry. Int J Food Microbiol. 2024-Nov-02;424:110849. doi:...
**Han et al., 2021** | Antibiotics (Basel) | Other Han Hee-Won, Kwak Jin-Hwan, ... Lee Jung-Hwan. Grapefruit Seed Extract as a Natural Derived Antibacterial Substance against Multidrug-Resistant Bacteria. Antibiotics (Basel). 2021-Jan-18;10(1). doi:1...
**Shankar et al., 2018** | Int J Biol Macromol | Other Shankar Shiv, Rhim Jong-Whan. Preparation of antibacterial poly(lactide)/poly(butylene adipate-co-terephthalate) composite films incorporated with grapefruit seed extract. Int J Biol Macromol. 20...
**Brandin et al., 2007** | Eur J Clin Pharmacol | Other Brandin Helena, Myrberg Olle, ... Brenning Gunilla. Adverse effects by artificial grapefruit seed extract products in patients on warfarin therapy. Eur J Clin Pharmacol. 2007-Jun;63(6):565-70 OB...
**Semprini et al., 2004** | Vet Ital | Other Semprini P, Langella V, ... Calvarese S. Antibacterial properties of grapefruit seed extract against Paenibacillus larvae subsp. larvae. Vet Ital. 2004;40(2):39-45 Twenty-one samples of grapefruit seed ext...
Frequently Asked Questions
What is Grapefruit Seed Extract and what is it used for?
Grapefruit Seed Extract (GSE) is a substance known for its potent antimicrobial and antibacterial properties. While there is moderate evidence of its ability to inhibit various bacteria and fungi, it is primarily researched for use in food preservation and industrial applications.
Can Grapefruit Seed Extract help fight bacterial infections?
There is moderate evidence that GSE can inhibit various microorganisms, including multidrug-resistant bacteria. However, human clinical evidence for using it as a therapeutic treatment for infections in people is currently limited.
What is the effective dose of Grapefruit Seed Extract?
There are currently no established effective doses for Grapefruit Seed Extract available from human clinical trials. Because human research is limited, a recommended dose for health purposes has not been determined.
Is Grapefruit Seed Extract safe to take?
There is insufficient evidence regarding the safety of GSE in humans, but some artificial products have been linked to adverse effects. You should be cautious, particularly regarding potential interactions with specific medications.
Does Grapefruit Seed Extract interact with any medications?
There is insufficient evidence, but artificial GSE products have been linked to adverse effects in patients undergoing warfarin therapy. If you are taking blood-thinning medication, you should consult a doctor before use.
Who should avoid using Grapefruit Seed Extract?
People taking warfarin therapy should avoid or use extreme caution with GSE due to potential adverse interactions. Because human clinical evidence is limited, anyone with underlying health conditions should consult a healthcare professional.
Is Grapefruit Seed Extract used for food preservation?
Yes, there is moderate evidence that GSE can be used to prevent contamination, such as preventing Pseudomonas spp. in edible mushrooms. Its primary research focus remains on its effectiveness in food and industrial settings.
Answers generated from research evidence. Not medical advice.