---
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: "S$60"
currency: SGD
in_stock: true
reviews_count: 13
category: "Institut Katharos"
url: https://www.desertcart.sg/products/48003983-highest-purity-colloidal-silver-300ml-40-ppm-free-spray-to
store_origin: SG
region: Singapore
---

# Type 1 UltraPure water Certified by 3 independent labs 40 PPM ultra-concentrated silver 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:** S$60
**Availability:** ✅ In Stock

## Summary

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

## 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?** S$60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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

- • **Purest Base:** Uses Type 1 UltraPure water for ultimate cleanliness
- • **Lab-Tested Trust:** Transparency with 3 independent lab certifications
- • **Crafted with Care:** Made exclusively in France by specialists, no outsourcing
- • **On-the-Go Wellness:** Includes free 30ml spray bottle & measuring cup for convenience
- • **Power-Packed Purity:** 40 PPM concentration for unmatched effectiveness

## 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 to preserve purity, it includes a free portable spray bottle and measuring cup, crafted exclusively in France by dedicated specialists. Trusted by over 19,000 users, this product offers versatile applications for immune support, skin care, and respiratory wellness.

## Description

From the brand 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: The WHY, HOW and WHEN. One of the best Colloidal silver products on the market, why and tips on review. Try it = Love it - !Note: The manufacturer supplied a review or discounted sample for my own evaluation. I only accept / request items that I'm interested in and the opinion of the product is my own personal view. ***PERSONAL OVERALL OPINION*** This seems to be one of those products that when you come across the products page on desertcart, you think ??? What on earth is this? But then, when you start gathering information, on everything that it can actually do, and one feels like WOW, really!?! At least, been honest, these were my thoughts about this product. Now that I have tried it for over a month… Would I buy it again? YES, but instead of the offered small bottle, I would simply buy the big one. Although, I'm grateful for the opportunity given, as a little product goes a long way and I have been able to discover an amazing and unknown product to me. In order to complete my review, in case it helps, I am sharing all the info I have on the product, so you know exactly what this product is, what it's used for and how. The best way to describe this product is as a natural antiseptic, which by what I have read, it has been used for over 6000 years (so it must be effective) It's important to remember and I must point out, without getting into too much detail, that without any negative reports or any health related issues (that I am aware of, after a lot of reading) that the ingestion of colloidal silver was banned in the European Union at the beginnings of 2010. This is in fact what many refer to as a "Worldwide Battle". As a very brief overview, we could simply say, that the government tries to make it very difficult to sell silver products as Colloidal Silver, as a food supplement because it directly competes with the antibiotic market (makes a lot of sense to me) In the United States, Australia, New Zealand and many other countries Colloidal Silver is still greatly used as a food supplement. ***How can we use colloidal silver?*** We can: *Ingest orally I have taken it orally and I'm standing on my two feet better than ever ;) *Breathe it's vapours / inhale it With a nebuliser, a facial steamer (much cheaper) or by the old pan and towel method. *External applications Apply it on cuts, burns, grazes.. On humans as well as on our pets ;) ***What can it be helpful for?*** Orally *Fatigue *Gastro-intestinal problems *Low immune system *Infections (in general) Inhaling it's vapours *Respiratory infection *Colds *Pneumonia *Bronchitis *Sinusitis External applications *Burns *Skin irritations *Bacterial skin infections *Cuts *Grazes ***Anything important to know?*** That if you're taking it orally, you can't use a metal spoon, as it reduces the effectiveness. The kiddies syrup plastic spoons or "calpol" syringes are the easiest to use. Always leave the product under the tongue, for one minute before swallowing (for better absorption) Taste is not too bad ;) ***How much do I take?*** ***How do I apply it?*** Orally As a nutritional supplement: ½ a teaspoon /2.5 ml per day To boost immune system: 2 teaspoons /10ml per day. 5ml each time on an empty stomach For temporally illnesses as a bad cold etc.: 1 teaspoon / 5ml up to 3 times a day (morning, at noon and at night). Total of 15ml per day. For long term treatments (several months): 2 teaspoons per day/ 10ml per day. With a nebuliser / inhalation Put 2 teaspoons into the nebuliser container, turn it on and breathe slowly and deeply for around 15 minutes (or until the liquid has disappeared) whichever happens first. Repeat three times a day for colds, pneumonia, bronchitis and sinusitis. External applications - On skin You can wet a bandage or a dressing in colloidal silver and apply it on the area. You can also spray it directly on the area to treat. ***What about my Pets?*** As with humans it is possible to use colloidal silver either externally or internally. External use: Sprayed to the required area, at least 3 times per day, for at least one week. Internal use: Administered with a feeding syringe or adding it into your pet’s water or food. +++PROS+++ + 1 Product with many uses + Easy application + Taste is not bad + Does not seem to sting on skin applications. I have one daughter that has complained on a little graze, but she was moaning before I even touched the area, so?!? Not sure on that. ;/ My son, said it didn’t sting on a paper cut (he is younger than my girl) + Effective After having a few internal infections from a non-completed surgery earlier this year, I have been on 3 courses of two different antibiotics at once. As soon as I seem to recover and the treatment is finished, infection comes back shortly after. It has been bringing me down greatly. Finally I have used Colloidal Silver for the past month… And so far (fingers and toes crossed) Infection has not come back this time. I even feel better than before as it seems to help with overall fatigue. I will make sure, we never run out of this product. + Value for money For its numerous uses Because a little goes a long way. ***PERSONAL TIP*** If comparing prices and brands, as we all do. Always check the ppm/ml contents of the product. There is another ones been sold at the same price, and only contain 10ppm/100ml Which is 4 times less silver than in this Colloidal Silver from Institut Katharos. Therefore this Colloidal Silver is one of the best and most concentrated ones in the market. The water used to dilute the product is also ultra-purified and the pureness of the silver is 96% ionic silver (one of its purest forms) ---CONS--- None ***WHAT WOULD I IMPROVE / CHANGE?*** On the box it says, expiry date, from 6 months of opening. But my bottle already came open with the spray nozzle on, so…???!!! That has confused me a little. Besides that small comment, I am very happy I have discovered this superb and effective product and will always have a bottle at home. From a review request to a loyal customer.
Review: Fantastic product - Top marks all round because of great price value for money swift delivery and as you get two bottles The main container for the colloidal silver and a small spray bottle to dispense the liquid prior to any use or application Totally amazing

## 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 |
| ASIN  | B01FDZEZJS |
| Age Range Description | All Ages |
| Allergen Information | Contains: Soy Free |
| Best Sellers Rank | 2,119 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 1 in Colloidal Silver |
| Brand | Institut Katharos |
| Country of origin | France |
| Country of origin  | France |
| Customer Reviews | 4.5 4.5 out of 5 stars (19,529) |
| Customer reviews | 4.5 4.5 out of 5 stars (19,529) |
| Date First Available | 13 Sept. 2017 |
| Format | Spray |
| Is discontinued by manufacturer  | No |
| Item model number  | 002v |
| Manufacturer  | Institut Katharos |
| Product Dimensions  | 6.5 x 6.5 x 15.1 cm; 5 g |
| Serving Recommendation | 10 sprays per day |
| Units | 1 count |
| Volume | 300 Millilitres |
| Weight | 550 g |

## 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)

## 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

### ⭐⭐⭐⭐⭐ The WHY, HOW and WHEN. One of the best Colloidal silver products on the market, why and tips on review. Try it = Love it
*by P***S on 8 September 2016*

!Note: The manufacturer supplied a review or discounted sample for my own evaluation. I only accept / request items that I'm interested in and the opinion of the product is my own personal view. ***PERSONAL OVERALL OPINION*** This seems to be one of those products that when you come across the products page on Amazon, you think ??? What on earth is this? But then, when you start gathering information, on everything that it can actually do, and one feels like WOW, really!?! At least, been honest, these were my thoughts about this product. Now that I have tried it for over a month… Would I buy it again? YES, but instead of the offered small bottle, I would simply buy the big one. Although, I'm grateful for the opportunity given, as a little product goes a long way and I have been able to discover an amazing and unknown product to me. In order to complete my review, in case it helps, I am sharing all the info I have on the product, so you know exactly what this product is, what it's used for and how. The best way to describe this product is as a natural antiseptic, which by what I have read, it has been used for over 6000 years (so it must be effective) It's important to remember and I must point out, without getting into too much detail, that without any negative reports or any health related issues (that I am aware of, after a lot of reading) that the ingestion of colloidal silver was banned in the European Union at the beginnings of 2010. This is in fact what many refer to as a "Worldwide Battle". As a very brief overview, we could simply say, that the government tries to make it very difficult to sell silver products as Colloidal Silver, as a food supplement because it directly competes with the antibiotic market (makes a lot of sense to me) In the United States, Australia, New Zealand and many other countries Colloidal Silver is still greatly used as a food supplement. ***How can we use colloidal silver?*** We can: *Ingest orally I have taken it orally and I'm standing on my two feet better than ever ;) *Breathe it's vapours / inhale it With a nebuliser, a facial steamer (much cheaper) or by the old pan and towel method. *External applications Apply it on cuts, burns, grazes.. On humans as well as on our pets ;) ***What can it be helpful for?*** Orally *Fatigue *Gastro-intestinal problems *Low immune system *Infections (in general) Inhaling it's vapours *Respiratory infection *Colds *Pneumonia *Bronchitis *Sinusitis External applications *Burns *Skin irritations *Bacterial skin infections *Cuts *Grazes ***Anything important to know?*** That if you're taking it orally, you can't use a metal spoon, as it reduces the effectiveness. The kiddies syrup plastic spoons or "calpol" syringes are the easiest to use. Always leave the product under the tongue, for one minute before swallowing (for better absorption) Taste is not too bad ;) ***How much do I take?*** ***How do I apply it?*** Orally As a nutritional supplement: ½ a teaspoon /2.5 ml per day To boost immune system: 2 teaspoons /10ml per day. 5ml each time on an empty stomach For temporally illnesses as a bad cold etc.: 1 teaspoon / 5ml up to 3 times a day (morning, at noon and at night). Total of 15ml per day. For long term treatments (several months): 2 teaspoons per day/ 10ml per day. With a nebuliser / inhalation Put 2 teaspoons into the nebuliser container, turn it on and breathe slowly and deeply for around 15 minutes (or until the liquid has disappeared) whichever happens first. Repeat three times a day for colds, pneumonia, bronchitis and sinusitis. External applications - On skin You can wet a bandage or a dressing in colloidal silver and apply it on the area. You can also spray it directly on the area to treat. ***What about my Pets?*** As with humans it is possible to use colloidal silver either externally or internally. External use: Sprayed to the required area, at least 3 times per day, for at least one week. Internal use: Administered with a feeding syringe or adding it into your pet’s water or food. +++PROS+++ + 1 Product with many uses + Easy application + Taste is not bad + Does not seem to sting on skin applications. I have one daughter that has complained on a little graze, but she was moaning before I even touched the area, so?!? Not sure on that. ;/ My son, said it didn’t sting on a paper cut (he is younger than my girl) + Effective After having a few internal infections from a non-completed surgery earlier this year, I have been on 3 courses of two different antibiotics at once. As soon as I seem to recover and the treatment is finished, infection comes back shortly after. It has been bringing me down greatly. Finally I have used Colloidal Silver for the past month… And so far (fingers and toes crossed) Infection has not come back this time. I even feel better than before as it seems to help with overall fatigue. I will make sure, we never run out of this product. + Value for money For its numerous uses Because a little goes a long way. ***PERSONAL TIP*** If comparing prices and brands, as we all do. Always check the ppm/ml contents of the product. There is another ones been sold at the same price, and only contain 10ppm/100ml Which is 4 times less silver than in this Colloidal Silver from Institut Katharos. Therefore this Colloidal Silver is one of the best and most concentrated ones in the market. The water used to dilute the product is also ultra-purified and the pureness of the silver is 96% ionic silver (one of its purest forms) ---CONS--- None ***WHAT WOULD I IMPROVE / CHANGE?*** On the box it says, expiry date, from 6 months of opening. But my bottle already came open with the spray nozzle on, so…???!!! That has confused me a little. Besides that small comment, I am very happy I have discovered this superb and effective product and will always have a bottle at home. From a review request to a loyal customer.

### ⭐⭐⭐⭐⭐ Fantastic product
*by S***N on 4 January 2026*

Top marks all round because of great price value for money swift delivery and as you get two bottles The main container for the colloidal silver and a small spray bottle to dispense the liquid prior to any use or application Totally amazing

### ⭐⭐⭐⭐⭐ A good product, the small spray bottle is a very useful addition. has a mild metallic taste
*by T***Y on 3 February 2024*

This is the 2nd time ive purchased this product and i haven't turned blue yet drinking it... regardless id rather drink (intermittently) a lab-tested product then risk the home made stuff to avoid the potential side effects I've heard about, so this fits the bill nicely. It's got a slightly more metallic test then some other brands ive used before, but its very mild. i appreciate the glass bottle. the spray bottle is very handy. ive used it on rashes, cuts and burns, as supposedly it helps heal faster, but ive never measured that. other ways ive usually used it, is to hold a drop/ spray under the tongue, and spray into my ear and nose when ive had a cold and am congested, i feel it also helps reduce the time I'm ill. my understanding is the silver ions, are spikey and puncture the bad stuff- but im not a scientist, i just like the idea of simple natural products. (other natural stuff I enjoy includes oregano oil, oysters for bioavailable zinc, apple cider vinegar, tamarind using glass food storage, and grounding feet in damp earth alongside natural sunlight. It's the simple hippie things but they seem to add up to my overall sense of well-being so ill keep using them)

## 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 Singapore*
*Store origin: SG*
*Last updated: 2026-02-14*