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Maximum GSE Liquid Concentrate Review – 6 Reasons Why

By Sasha de Beausset Aparicio, MSc

Reviewed by Rebecca Williams, MD, MA, MB, BChir

Last Updated:

Evidence Based | Synopsis | What's Inside? | Benefits | Warnings | How To Use | Final Thoughts

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. 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.


1) Maximum GSE Liquid Concentrate at a Glance

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.

What’s Inside?

2) What’s Inside Maximum GSE Liquid Concentrate?

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


3) Maximum GSE Liquid Concentrate Benefits & Results

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


4) Maximum GSE Liquid Concentrate Product Warnings

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

How To Use

5) How to Use Maximum GSE Liquid Concentrate

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.

Final Thoughts

6) Final Thoughts on Maximum GSE Liquid Concentrate

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, Maximum GSE Liquid Concentrate should only be used after consulting a healthcare specialist.

3.5/5 - (6 votes)
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