Comparison of mineral based amorphous silica and plant based amorphous silica

Sometimes, people consider mineral based amorphous silica and plant such as rice hull based amorphous silica are the same products and think that both are harmful to human body.
Such information is incorrect and we explain it as follows:
Silica dioxide Si02 (hereafter referred to as silica) is quartz, tridymite, etc., and its content is 12% of all crusts as crystal and is inexhaustible.
Its existence started together with the birth of the earth.
Amorphous silica made by the decristalization of crystalline silica through the industrial technology exists in the market.
Until now, amorphous silica is known to be silica decrystallization made by industrial methods.
However, as we investigate the synthetic process of silica, first finely powder the mineral silica as primary particle with the burning method, etc, to the size of 5nm – 55nm and aggregate them to the mass in the size of 50μ-500μ and name it amorphous silica.
The reason why it is called amorphous is because it is aggregated, yet if you judge from the molecular engineering perspective, primary particle 5nm is a crystal made of 1950 single molecules. And for 55nm is a crystal of about 2,600,000 single molecules.
As for the chemical raw materials, they are called amorphous because they are aggregated.
According to the research report on risk of chemical substances (development of hazard assessment and risk prediction method such as toxicokinetics　and toxicoproteomics, etc. on nano material percutaneous toxicity) from Ministry of Health, Labour and Welfare, toxicity is confirmed even in the 40nm synthetic silica.

According to the “Screening of Information Data Set For High Volume Chemicals OECD Initial Assessment” by OECD, human health damage was reported from using 1-350nm synthetic amorphous silica. Screening Information Dataset (SIDS) Initial Assessment Report for. Synthetic Amorphous Silica and Silicates: Silicon Dioxide (CAS ... Human inhales and discharge ultrafine particle amorphous silica. For SAS type (CAS No.7631-86-9), animal experimentation shows even when inhales and exposed for long period, they are immediately discharged afterwards and are not distributed to mediastinal lymph nodes in excess, whereas crystal types tend to accumulate and remain distinctively in the lung, and lymph notes. Humans and animals have less intestinal absorption. Absorbed SAS is proved to be discharged immediately through kidney.

As a result, mineral based amorphous silica is the aggregates of crystalline silica and is harmful to human, unlike rice based amorphous silica.
So called mineral based fully amorphous silica is sold at high price in the market.
Manufacturing method is to finely grind quartzes and crystals and plasmifies it at high temperature of over 2000 degrees and cool it down immediately to make amorphous silica, yet in chemical theory, achieving 100% efficiency is impossible. Therefore, large amount of crystalline silica is thought to be remained and is presumed to be very dangerous to human body.　

Unlike mineral silica, plant silica, such as rice silica is single-molecule silica which coexists with foreign matters (cellulose).
Foreign matters are essential to the structure of single-molecule silica.
100g of rice hull contains 23500mg of silica, which is 117 times of potato whose content is fairly large among all other foods.

In Europe, silica has been studied fairly long time, and they found out plant based silica is an important element for human body composition.
For about 10 years, silica has been popular as supplement and medicine and people store them at home as a regular medicine.
Also, a supplement manufacturer has more than 120,000 distributors for over 15 years, their sales are No.1. The market is really big.

Now, some people still think silica is dangerous.
Please understand the difference between the pure amorphous silica and the one which is manufactured at the chemical industry and learn the current situation in the world.
You might have doubts after reading a toxicity report from Ministry of Health, Labor and Welfare and get confused about the nano silica and plant based silica. 　
Ingredients of Silica as a medicine in Europe are the rice hull ash discharged from rice hull power plant in Thailand and a manufacturer in Germany take them altogether and buy them at high prices.
① German manufacturer of water soluble silica ask Thailand to burn the rice hull as cold as possible in order to keep the silica content in the burnt ash.
Also, some Japanese manufacturers manufacture water soluble silica from crystals yet attention has been paid to the consumers against these products.
Japan has succeeded in manufacturing ultrafine rice hull powder a head of the world; moreover, it is a micro size fine powder.
A lot of effects are confirmed from the rice hull when they are micro sized, finely powdered.
(Please refer below for the personal views from the users of the ultrafine rice hull powdered silica.)

We succeeded to manufacture rice hull in powder; this is the world first Japanese technology and moreover it is a micron size.
This works very effectively.　

（Personal comments after trying ultra fine rice hull silica are found here)

When grain of rice hull silica is rough, you might feel the roughness as you take them and they are not only unsuitable for food, but also may damage the internal organ by the projection of the hard silica and is dangerous.
That is the reason we recommend ultrafine powdered silica.
They are easy to digest as well.