UPDATED 05/14/2016

Nutribiotic Maximum GSE Liquid Concentrate Review
Nutribiotic Maximum GSE Liquid Concentrate Review

PUBLISHED: 02/06/2013 by brreader
Editor's Review: 3.6/5.0
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Nutribiotic Maximum GSE Liquid Concentrate

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Nutribiotic Maximum GSE Liquid Concentrate is used worldwide as a nutritional support for people with various health concerns. The company behind this formula is Nutribiotic, a company founded in 1980, driven by the inspiration of research of Ph. D. Linus Pauling, a two-time Nobel Laureate. After starting their work on development of a variety of forms of Vitamin C and other nutrients, they pioneered in 1987 the process and use of grapefruit seed extract. Today, they manufacture a wide variety of grapefruit seed extract products, rice protein and vitamin c supplements, and body care products.

Nutribiotic’s Maximum GSE Liquid Concentrate contains Citricidal, which is a natural quaternary compound synthesized from the seed and pulp of grapefruit that has been proven highly effective in numerous applications. Liquid extract of Citridical contains 60% grapefruit extractives as well as 40% vegetable glycerine. The manufacturer advertises this product as being produced without gluten and GMOs. Because it is very concentrated and has a pH of about 2.2, which is very acidic, it is recommended to be used only diluted. Nutribiotic Maximum GSE Liquid Concentrate is used not only in gastrointestinal and tropical benefits, but systemic support as well. It has antioxidant properties and is used for cleaning the body of harmful bacteria, viruses, infection, parasites and fungi, and for promoting and protecting the immune system.

Nutribiotic Maximum GSE Liquid Concentrate Ingredients

Nutribiotic Maximum GSE Liquid Concentrate includes the following ingredients: Citricidal – Grapefruit seed extract (60%) and vegetable glycerine (40%)

Product Features

Nutribiotic Maximum GSE Liquid Concentrate is an extract of grapefruit seeds and pulp called Citricidal and has an addition of 40% vegetable glycerine. It is mainly used for its antioxidant properties in treatments for various skin, hair, and nails problems. It has very good antibacterial, antifungal and antimicrobial properties which make it very useful against a large range of parasites, infections and viruses. Liquid GSE Concentrate should be used only external as the manufacture recommends and since it has a very acidic pH of about 2.2 it should only be used in a diluted state.

Although grapefruit seed extract is marketed as a natural product, there are a lot of controversies regarding this, because lab testing has shown presence of paraben-based preservatives in GSE which make it rather unnatural. But of course there are people on both sides, some saying that it’s 100% natural, others saying that it’s not in comparison to handmade GSE which was not altered in any way and show no preservative qualities. Nutribiotic advertises Maximum GSE Liquid Concentrate as having no such unnatural preservatives and they say that extensive testing done at independent laboratories and universities has proven the product to be safe for human consumption.

GSE liquid concentrate is very effective against pathogens due to its natural quaternary compounds which are molecularly similar to the ones that belong to a family of synthetic quaternary ammonium. Such synthetic compounds like benzalkonium chloride and benzethonium chloride are used in the cosmetics industry and are very toxic antimicrobial preservatives. While Grapefruit Seed Extract is molecularly similar to these compounds, there are some profound differences in structure and function.

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  • Nutribiotic Maximum GSE Liquid Concentrate has a wide variety of use in problems with bacteria, infections, fungus
  • It has a low price


  • GSE is known to interact with certain drugs, increasing the potency of many compounds
  • Grapefruit seed extract has a controversial history


Even though the grapefruit seed extract has a controversial history regarding its natural content, it has proven its efficiency in treatments of various skin diseases, whether we’re talking about fungus, bacteria or microbes. It has a wide range of applications and can be used as a facial cleanser, for skin rinse, in nail or scalp treatments. It is also used in a variety of household applications such as vegetable or fruit wash, an additive to dishwashers and utensil cleaning, or simply as all purpose cleaner. Nutribiotic does not indicate on their website the affections for which this full spectrum of bioflavonoids is supposed to be used; therefore, Nutribiotic Maximum GSE Liquid Concentrate should only be used after consulting a healthcare specialist.

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Nutribiotic Maximum GSE Liquid Concentrate Reviewbrreader3.52016-05-14 12:09:31
Nutribiotic Maximum GSE Liquid Concentrate Review
3.00 out of 5 based on 2 user ratings
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2 User Reviews about Nutribiotic Maximum GSE Liquid Concentrate
  1. 1

    Our son bought us some to try.Question is : why does the label say ‘for external use only’
    While your customers claim to consume it internally in diluted form ?

    • 2

      Hi Frank,

      The recommended use is external only, due to the highly acidic pH. Some people claim to have used it internally as well, in a very diluted form, with positive results. However, if this is something you are considering, we strongly advise you to consult a healthcare professional beforehand. Otherwise, you should use it as the label states.

      Kind regards,
      BR Editor