It all boils down to purity. In order for Sirius Metals’ Colloidal Metal products to be reagent grade, the purity must be as high as possible in order to make the cut for laboratory use. Any contaminant in any of our products could produce faulty results when used in a chemical reaction.
For supplement grade Colloidal Metals, it is not completely required to have a purity of 99.999+% (although it is much preferred).
It is like comparing reagent Sodium Chloride to regular table salt. Both are salt, both you can eat safely. However the table salt will have other stuff in it (iodine for iodized salt, additional minerals from sea salt and pink salt, etc). Sodium Chloride on the other hand, is only Sodium Chloride with nothing else.
This applies to Magnesium L-Threonate as well. Both (our colloids and our Magnesium L-Threonate) are safe to consume, but since neither are sold as a supplement and none of our products include proper dosage, we do not condone the consumption of it as a supplement.