Laboratory Grade Colloidal Silver


Colloidal silver is a colloid made of 銀離子抗菌
high purity (.999) silver nanoparticles which measure between 5 nm and 100 nm and are suspended in water. The silver nanoparticles remain suspended diffracting light so that the whole solution will take on a certain color and stay that way. The color it acquires varies from light amber to cherry like under room lighting to an intense orange when the light is shined directly behind it. The nanoparticles of silver measure between 5 nm and 20 nm, ensuring their safety and preventing Argyria and silver toxicity, known side effects of silver, even when large quantities are used.


The size is also very important. Colloidal particles in size are safe for humans, animals and other multicellular organisms. The size for colloidal particles of silver ranges between 5 nm to 100 nm. If the particles are smaller than 5 nm then the solution behaves like a molecular suspension and it is considered toxic. On the other hand, if the majority of the particles are larger than 100nm, they can be deposited as a heavy metal in the body, causing a condition known as argyria (a condition where silver is deposited as a heavy metal and can cause a permanent discoloration). In either case, too small or too large, the results are undesirable.


The particles of silver measure between 5 nm and 100 nm. Colloidal particles are nano in size, nm stands for nanometer. If unsure one can always use the Tyndall Effect Test to determine how colloidal any silver solution is by comparing the intensity of the Tyndall effect and the ppm of the solutions.

Silver ions are formed as nanoparticles of silver become charged. An ion is defined as follows: An atom or group of atoms that has either lost one or more electrons, making it positively charged (a cation), or gained one or more electrons, making it negatively charged (an anion). In other words, a nanoparticle is a group of atoms, and it the nanoparticle is charged then it is an ion. Colloidal silver nanoparticles have an electrical charge otherwise they would not remain suspended, therefore colloidal silver is an ionic solution.


Colloidal silver shows highly potent antibacterial activity toward both Gram-positive and Gram-negative bacteria. This condition may be due to its accumulation in the bacterial membrane. A membrane with such morphology exhibits a significant increase in permeability, resulting in death of the cell.


Silver ions interact with both Gram-positive and Gram-negative bacteria in 4 different ways:


  • The silver ions interact with sulfhydryl (-SH) groups of proteins which inhibit bacterial respiration.
  • The silver ions interact with bases of DNA. This interactions leads to the inhibition of DNA unwinding.
  • The silver ions act inhibiting cell division and cause damage to bacterial cell envelopes.
  • The silver ions interact with hydrogen bonding processes in the bacteria.



In viruses silver is size dependent. It has been noted silver ions rendering dysfunctional certain actuator molecules. An example that is fairly easy to explain is the following: When silver ions catalyze a phosphate ‘b’ actuator molecule, (an organic actuator molecule that normally opens and closes a virus’ orifice through which it injects an RNA strand into a host organism, causing the host to produce a new generation of viruses) the actuator becomes dysfunctional and will not open the orifice, making it impossible for the virus to inject the RNA strand into the host. The reproductive cycle of the virus is broken because it cannot induce the host to produce new offspring.

Modern Research Confirms What Old Researchers Already Knew

Before 1939 nano colloidal silver particles were known as colloidal silver. Colloidal silver was researched and found to have over 95 uses NOT 650. Today nano particles of silver are being widely researched for diverse purposes.

So here you have it. Colloidal silver manufacturers out there do not make colloidal silver if it does not fit the description. The reason why there is such a misunderstanding about whether colloidal silver is good or not is because there are too many manufacturers each making something which does not fit the colloidal description of colloidal silver.

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