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NutriBiotic Grapefruit Seed Extract Liquid Concentrate 2 fl. oz. bottle
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NutriBiotic Grapefruit Seed Extract Liquid Concentrate 2 fl. oz. Review

NutriBiotic® GSE Liquid Concentrate is a compound derived from the seed, pulp, and inner rind of grapefruit. This extract is used by healthcare professionals worldwide for its broad-spectrum benefits. It is a popular choice for those seeking immune support for their health.

Product Focus: Immune HealthAlso covers:Breathing
Tier ⓘ
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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
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Biohacker Mentions
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Cost per month
$4
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Study, Trial or Testing Result Summary

MembersHuman studies

The human evidence for grapefruit seed extract and immune support is . It has only been studied as one part of a nasal spray or mist that also had thermal water and hyaluronic acid, so its on its own is unknown. …

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Review Totals and Summary

Members68,320 reviews
68,320 reviews · IHerb 61,428 · Amazon 6,863 · Vitacost 29

This summary compiles customer feedback for NutriBiotic Grapefruit Seed Extract Liquid Concentrate 2 fl. oz. The product holds a reputation across stores, accumulating approximately 68,320 ratings, with available reviews giving it 4 or 5 stars. …

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Biohacker Summary

MembersWhat our biohacker panel says

Those in favor take it for blood sugar and insulin sensitivity, liver support, appetite control and digestion, as the whole fruit, with one suggesting half a grapefruit a day in the morning or with carbs, while one also uses grapefruit extract in tea and in saline rinses. Two panelists that grapefruit can slow the liver's detox , which matters especially when taking meds, and one says it is bitter to curb appetite. …

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RAL Summary

MembersThe tier and why

The extract was only tested inside a nasal combination product, never alone or by mouth. …

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Immune system, Respiratory system. Combine with and possible side are for members.

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Supplement Facts

Grapefruit Seed Extract 100 mg
Supplement Facts
Serving Size 10 Drops
Servings Per Container 200
Amount Per Serving% Daily Value
Grapefruit Seed Extract100 mg†
† Daily Value not established.

Directions: Adults, mix 10 drops of NutriBiotic GSE Liquid Concentrate into a glass of water or juice (5 oz or more ), 1-3 times daily, with or without meals. For children 5 years of age and older, mix 3 drops into a glass of water or juice, 1-2 times daily. Or, use as directed by your healthcare professional. Do not use full strength in mouth.

Barcode (UPC) 728177010003 · Label source: iHerb · Report a label change

Where to Buy

NutriBiotic · Amazon · iHerb
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Our articles on this subject

Graded October 24, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.