---
product_id: 48003983
title: "Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos"
brand: "institut katharos"
price: "€ 45.51"
currency: EUR
in_stock: true
reviews_count: 13
category: "Institut Katharos"
url: https://www.desertcart.pt/products/48003983-highest-purity-colloidal-silver-300ml-40-ppm-free-spray-to
store_origin: PT
region: Portugal
---

# 40 PPM ultra-concentrated silver Certified by 3 independent labs Includes free 30ml refill spray Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos

**Brand:** institut katharos
**Price:** € 45.51
**Availability:** ✅ In Stock

## Summary

> ✨ Elevate your wellness game with the purest, most potent colloidal silver on the market!

## Quick Answers

- **What is this?** Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos by institut katharos
- **How much does it cost?** € 45.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/48003983-highest-purity-colloidal-silver-300ml-40-ppm-free-spray-to)

## Best For

- institut katharos enthusiasts

## Why This Product

- Trusted institut katharos brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lab-Tested Trust:** Transparency with 3 independent lab certifications ensures you get exactly what you pay for
- • **Crafted with Care:** French-made, specialist-produced colloidal silver with over a year of dedicated R&D
- • **On-the-Go Wellness:** Free portable 30ml spray bottle + measuring cup for precise, convenient daily use
- • **Ultra-Pure Formula:** Made with Type 1 UltraPure water and stored in amber glass to preserve potency and purity
- • **Power-Packed Purity:** 40 PPM concentration for unmatched effectiveness backed by peer-reviewed science

## Overview

Institut Katharos’ Highest Purity Colloidal Silver delivers a superior 40 PPM concentration using Type 1 UltraPure water, verified by three independent laboratories. Packaged in amber glass with a free 30ml refill spray, this French-crafted solution offers professional-grade purity and convenience for health-conscious users seeking trusted, effective colloidal silver.

## Description

It was in October 2014 that Jean, our founder, heard about colloidal silver for the first time. Taken aback, he discovers its incredible merits and wonders why this solution is so little known to the general public. It was in the face of this observation that the Katharos Institute was born and it has a clear mission: to make the world aware of the extraordinary qualities of this thousand-year-old product! What makes our company unique? The feeling of having a mission: We are fortunate to be able to offer you this product and are aware of this great responsibility. Why we love what we do? We love colloidal silver and the impact it has on you. The whole team carefully reads each of your opinions and that gives us the energy to serve you on a daily basis. Why do we only make colloidal silver? We are convinced that manufacturing with care in France only colloidal silver is the best proof of quality What makes our company unique? The feeling of having a mission: We are fortunate to be able to offer you this product and are aware of this great responsibility. Why we love what we do? We love colloidal silver and the impact it has on you. The whole team carefully reads each of your opinions and that gives us the energy to serve you on a daily basis. Why do we only make colloidal silver? We are convinced that manufacturing with care in France only colloidal silver is the best proof of quality A complete range. Gel, liquid, small format, economical format ... Our colloidal silver is available in 7 different packaging. A complete range. Gel, liquid, small format, economical format ... Our colloidal silver is available in 7 different packaging. Is the bottle made of glass? Yes. Although more expensive and fragile, we chose glass to maintain the purity of the solution. No compromise on quality! What is the expiration date? You can store colloidal silver for 30 months without opening it. Once opened, you have 16 months to use it. Where can I find the Ebook? Upon your purchase, you will receive an email within 3 days including your Ebook. You can also download it from the QR code on the packaging or label. Is the bottle made of glass? Yes. Although more expensive and fragile, we chose glass to maintain the purity of the solution. No compromise on quality! What is the expiration date? You can store colloidal silver for 30 months without opening it. Once opened, you have 16 months to use it. Where can I find the Ebook? Upon your purchase, you will receive an email within 3 days including your Ebook. You can also download it from the QR code on the packaging or label. Discover our Sprays & Gel ! Visit the store Discover our Sprays & Gel ! Visit the store Discover our bottles ! Visit the store Discover our bottles !

Review: Great as deodorant and mouthwash! - I keep reordering this particular Colloidal Silver because it's the best quality I've found. I purchased 10PPM from a different seller on desertcart and although I thought that one was great, this is by far much better and suitable for my use. I consume in small quantities to treat candida overgrowth, use it as a mouthwash mixed with tea tree oil essential oil and make my own deodorant with this. Like me, many people are very sensitive to the ingredients in commercial antiperspirants and deodorants. I certainly don’t miss sopping my skin with potentially dangerous aluminium, which is a main ingredient in most deodorants, and which has been linked to Alzheimer’s disease, nervous system seizures, breast cancer, kidney problems, bone formation disorders and more. If you're sensitive or just want an alternative to dangerous aluminium-containing antiperspirants, try creating your own deodorant by thoroughly mixing the following ingredients in a 200-300ml spray bottle: 50-100ml of colloidal silver 8 to 10 drops of lavender oil 8 to 10 drops of rosemary oil 8 to 10 drops of sage oil Sage has a light action as a natural antiperspirant. Perspiration odours on the skin are produced by bacteria. Colloidal silver works as an excellent antibacterial and is extremely beneficial to the skin as well. Rosemary and lavender are not only aromatic, but they also have profound soothing and healing properties. Shake this mixture well before each application. Alternatively, this mixture is also super effective as an air freshener, especially after stinking up a bathroom. As a mouthwash, you simply swish the CS on its own around the mouth or alternatively you can make a mixture with tea tree oil, peppermint oil or spearmint oil. For sweetness, you may add a bit of xylitol to the mixture. If you have candida overgrowth, you can also take a small amount of CS under your tongue, hold it there for 30 seconds, the swallow. Doesn't taste great but good for the overgrowth of bad bacteria. Don't overdo this as you may eliminate the good gut flora. NB: Before using essential oils, please make sure you do patch tests in case of allergies or skin reactions.
Review: Miracle cure for infections - I had a minor surgical procedure done. I had stitches and when they came out, there was an infection. I took a round of antibiotics, the infection cleared up. Then, despite great pains to care for the wound, eat well, keep it dry, covered, etc, it got infected again. I took a second round of antibiotics, and felt compelled to purchase this product, after hearing about it years ago, and reading the reviews. I bought the 300ml bottle which comes with a small spray bottle. 3 times a day, I used it, first making a compress and holding it onto the wound, then spraying and leaving the mist to rest on top and soak in. It seemed to draw the infection out. Then I put Vaseline mixed with the colloidal silver on top to seal it from tap water and pollutants. I have been using it for 2 weeks, the infection is all but gone and the wound has healed up like a miracle. I was worried at first to use it, because it had been such a battle of severely angry infection, recurring & persisting, despite everything that had been done..., but I should not have been, and after even the first 1 or 2 sprays, I could see it working, drawing out the infection and healing. From there, I used with absolute confidence. Amazingly stuff, I am a convert, it does what it says it does. This is a high quality product.

## Features

- ✅ MORE CONCENTRATED FOR INCREASED EFFECTIVENESS ✅ After more than a year of research, we have accomplished what few others have achieved: Producing concentrated colloidal silver at 40 PPM via low-voltage electrolysis. This is of paramount importance since a more concentrated solution is more effective, as demonstrated by a peer-reviewed scientific study published in 2010 in the journal Applied Microbiology and Biotechnology.
- ✅ MORE THAN JUST COLLOIDAL SILVER ✅ Our mission as a team is to impart our love and knowledge of colloidal silver to you. The free E-book included with every purchase gives you an in-depth insight into the incredible world of Colloidal silver and how it can improve your life. The best part? All orders arrive with a beautiful 30ml spray to fill to conveniently take your colloidal silver with you anywhere. A handy measuring cup included makes sure you always pour the correct amount.
- ✅ WATER OF EXTREME PURITY ✅ We chose the purest water available - Type 1 UltraPure Water. It is used for the most critical laboratory operations, as in molecular biology. It must be pointed out that most colloidal silver solutions contain type 2 or 3 ultrapure water, which can contain up to 100 times more bacteria than type 1 ultrapure water! In order to maintain this high level of purity, we have chosen to use amber glass bottles.
- ✅ SOLUTION CERTIFIED BY 3 INDEPENDENT LABORATORIES ✅ Many companies have abused consumers' trust and are quick to have less PPM than advertised. In order to demonstrate our earnestness, we have published all the analyses that certify our concentration at 40 PPM as well as our use of type 1 ultrapure water, on our website. We are the only company in the industry to share the results of our product analyses with our users.
- ✅ WE ARE SPECIALISTS AND PRODUCE OUR SOLUTION OURSELVES ✅ Many companies do not mind subcontracting the production of their colloidal silver at the expense of quality. Often, these same companies also offer dozens of other outsourced products. We are proud to specialise in colloidal silver - in fact, we have been proudly producing, packaging and selling our solution ourselves for many years.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01FDZEZJS |
| Age Range Description | All Ages |
| Allergen Information | Contains: Soy Free |
| Benefits | Urinary Health |
| Best Sellers Rank | 10,119 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 3 in Colloidal Silver |
| Brand | Institut Katharos |
| Brand Name | Institut Katharos |
| Concentration | 40 part per million |
| Country Of Origin | France |
| Customer Reviews | 4.6 out of 5 stars 7,825 Reviews |
| Diet Type | Vegetarian |
| Flavour | Unflavoured |
| Item Form | Spray |
| Item Volume | 0.3 Litres |
| Item Weight | 5 Grams |
| Item form | Spray |
| Manufacturer | Institut Katharos |
| Manufacturer Part Number | 007 |
| Material Type Free | BPA Free |
| Model Number | 002v |
| Number of Items | 1 |
| Primary Supplement Type | Zinc |
| Primary supplement type | Zinc |
| Product benefits | Urinary Health |
| Unit Count | 1 count |
| Unit count | 1 count |

## Product Details

- **Brand:** Institut Katharos
- **Diet type:** Vegetarian
- **Flavour:** Unflavoured
- **Item form:** Spray
- **Item volume:** 0.3 Litres
- **Item weight:** 5 Grams
- **Number of items:** 1
- **Primary supplement type:** Zinc
- **Product benefits:** Urinary Health
- **Unit count:** 1 count

## Images

![Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos - Image 1](https://m.media-amazon.com/images/I/71n4x8P2tqS.jpg)
![Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos - Image 2](https://m.media-amazon.com/images/I/81UeaT7Cz8L.jpg)
![Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos - Image 3](https://m.media-amazon.com/images/I/81n3jCkBCbL.jpg)
![Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos - Image 4](https://m.media-amazon.com/images/I/81dl55StfjL.jpg)
![Highest Purity Colloidal Silver 300mL ● 40 PPM ● Free Spray to Fill ● Superior Concentration, Smaller Particles, Better Results ● Certified by 3 Independent Laboratories ● Institut Katharos - Image 5](https://m.media-amazon.com/images/I/61hGs+P2hZL.jpg)

## Questions & Answers

**Q: Is this non ionic form of silver?**
A: No. 
Ionic Silver is up to 10,000 times more effective than Colloidal Silver. With or without HCI mixture added, Ionic Silver is capable of eradicating all bacteria in just over four minutes. Silver particles being in the Ionic form are known to speed up the healing processes.

**Q: Does it have a long shelf life?**
A: It says so in the description.

**Q: The description at the top says ‘free spray to fill’ but others have commented no small spray bottle is included, please confirm as I’d Like one inc**
A: It's clear in the description. Smaller 100ml, no, as it is a spray. The larger bottle versions, like 300ml , come with spray and measuring cup.

**Q: How much do I ad to a pint of water please guys 😍**
A: No need to mix it with water. 
Drink as it is. 
Use a plastic spoon. No Metal. 
Have 10ml a day. I think there is a measure on the plastic cap.
Have

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great as deodorant and mouthwash!
*by M***A on 9 May 2018*

I keep reordering this particular Colloidal Silver because it's the best quality I've found. I purchased 10PPM from a different seller on Amazon and although I thought that one was great, this is by far much better and suitable for my use. I consume in small quantities to treat candida overgrowth, use it as a mouthwash mixed with tea tree oil essential oil and make my own deodorant with this. Like me, many people are very sensitive to the ingredients in commercial antiperspirants and deodorants. I certainly don’t miss sopping my skin with potentially dangerous aluminium, which is a main ingredient in most deodorants, and which has been linked to Alzheimer’s disease, nervous system seizures, breast cancer, kidney problems, bone formation disorders and more. If you're sensitive or just want an alternative to dangerous aluminium-containing antiperspirants, try creating your own deodorant by thoroughly mixing the following ingredients in a 200-300ml spray bottle: 50-100ml of colloidal silver 8 to 10 drops of lavender oil 8 to 10 drops of rosemary oil 8 to 10 drops of sage oil Sage has a light action as a natural antiperspirant. Perspiration odours on the skin are produced by bacteria. Colloidal silver works as an excellent antibacterial and is extremely beneficial to the skin as well. Rosemary and lavender are not only aromatic, but they also have profound soothing and healing properties. Shake this mixture well before each application. Alternatively, this mixture is also super effective as an air freshener, especially after stinking up a bathroom. As a mouthwash, you simply swish the CS on its own around the mouth or alternatively you can make a mixture with tea tree oil, peppermint oil or spearmint oil. For sweetness, you may add a bit of xylitol to the mixture. If you have candida overgrowth, you can also take a small amount of CS under your tongue, hold it there for 30 seconds, the swallow. Doesn't taste great but good for the overgrowth of bad bacteria. Don't overdo this as you may eliminate the good gut flora. NB: Before using essential oils, please make sure you do patch tests in case of allergies or skin reactions.

### ⭐⭐⭐⭐⭐ Miracle cure for infections
*by K***H on 14 September 2020*

I had a minor surgical procedure done. I had stitches and when they came out, there was an infection. I took a round of antibiotics, the infection cleared up. Then, despite great pains to care for the wound, eat well, keep it dry, covered, etc, it got infected again. I took a second round of antibiotics, and felt compelled to purchase this product, after hearing about it years ago, and reading the reviews. I bought the 300ml bottle which comes with a small spray bottle. 3 times a day, I used it, first making a compress and holding it onto the wound, then spraying and leaving the mist to rest on top and soak in. It seemed to draw the infection out. Then I put Vaseline mixed with the colloidal silver on top to seal it from tap water and pollutants. I have been using it for 2 weeks, the infection is all but gone and the wound has healed up like a miracle. I was worried at first to use it, because it had been such a battle of severely angry infection, recurring & persisting, despite everything that had been done..., but I should not have been, and after even the first 1 or 2 sprays, I could see it working, drawing out the infection and healing. From there, I used with absolute confidence. Amazingly stuff, I am a convert, it does what it says it does. This is a high quality product.

### ⭐⭐⭐⭐ Coloidial silver
*by C***E on 31 January 2026*

Same as the previous purchase. On the mark

## Frequently Bought Together

- Colloidal Silver Liquid 10 fl oz & Spray to Fill ● Bioactive Hydrosol Silver Water ● Natural Immune Support Nano Sol Supplement Solution ● Ionic Minerals 40 PPM ● Organic Structured Plata Coloidal
- Silver Miracles - Colloidal Silver Soap - 3 pack
- Silver Miracles - Colloidal Silver Gel - Nano Silver Gel Wound Care - Healing Ointment for Burns & Irritated Skin - for All Skin Types - 4 Oz Unscented

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-07-11*