Grapefruit Seed Extract, commonly known as GSE, is derived from the seeds and pulp of grapefruit and has drawn interest primarily for its potential antimicrobial properties. Research suggests that certain compounds in GSE may help support the body's natural defenses against a range of common microorganisms, including some bacteria and fungi, though the quality and scope of available studies vary considerably. Studies indicate that GSE may also play a supportive role in overall immune function, and it is widely available in both liquid concentrate and capsule forms for convenient use. It is worth noting that some researchers have raised questions about whether the antimicrobial activity observed in certain GSE products may be partly attributable to processing or added preservatives, so choosing well-sourced products and consulting a healthcare provider remains a thoughtful step.
Compare this supplementThese are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Capsule | 150–250 mg | Twice daily | Immune function support, antifungal and antibacterial use | Dosages noted in limited clinical trials and product-based research |
| Extract | 100–200 mg | Three times daily | Antimicrobial support, general immune function | Common range referenced in antimicrobial and clinical studies |
| Liquid | 5–15 drops | Three times daily | Antimicrobial properties, gastrointestinal infections | Typical liquid concentrate usage observed in small clinical and in vitro studies |
| Topical | 0.5–2 % | As needed | Topical antimicrobial application, skin infections | Concentration range used in in vitro and some applied antimicrobial studies |