The food grade-or human food grade DE is great,My Mum and I put it on our cornflakes every day!-it is white,not grey and mixes up fine with no after taste,We have found it is brilliant for detoxing and increased energy levels! Why,I have no idea,the only slight drawback is that we both spend longer in the bathroom
I'd be extremely cautious of taking this stuff internally some forms of DE are positively harmful if swallowed or breathed in. Self medicating yourself in this way is breath-takingly risky, particularly everyday, when you have "no idea" what it's doing. Frankly I would always consult your doctor before even thinking of taking any unprescribed medication the risks aren't worth the dubious benefits. DE is mostly silica and extremely abrasive on a microscopic scale.
History is littered with examples of wonder materials which subsequently turned out to cause longterm heath issues. Need I mention asbestos a not dissimilar material which had been used for hundreds, if not thousands of years and was hailed as a wonder building material only a matter of 35 years or so ago. The health risks were well established by the 1950's but were covered up and suppressed by manufacturers until exposed in the mid 70's. Tobacco has a similar bad record and still today isn't illegal to sell.
This is what Wiki says about DE's safety.
HF
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Safety considerations The absorbent qualities of diatomite can result in a significant drying of the hands if handled without gloves. The flux-calcined form contains a highly crystalline form of silica, resulting in sharp edges. The sharpness of this version of the material makes it dangerous to breathe and a dust mask is recommended when working with it.
The type of hazard posed by inhalation depends on the form of the silica. Crystalline silica poses a serious inhalation hazard because it can cause silicosis. Amorphous silica can cause dusty lungs, but does not carry the same degree of risk as crystalline silica. Natural or dried diatomite generally contains very low percentages of crystalline silica. Diatomite produced for pool filters is treated with high heat (calcining) and a fluxing agent (soda ash), causing the formerly amorphous silicon dioxide to assume its crystalline form.
The crystalline silica content of the dust's particulate is regulated in the United States by the Occupational Safety and Health Administration (OSHA), and there are guidelines for the maximum amounts allowable in the product and in the air near the breathing zone of workers."