I've noticed that on the bulk nutrition website, when one performs a search for piracetam and finds their brand of piracetam powder, it states clearly in the product specification label that there is a heavy metal concentration of less than or equal to 20 ppm.
*Meep*, Warning: I think this thread originates from a
MISUNDERSTANDING of chemical analysis values!When something reads "<20 ppm or 20 or less than..." of heavy metals, bacteria, etc., that usually means that a standard
test detecting above 20 ppm of that contaminant was performed on the batch, and that this test came out negative.
It doesn't imply 'contains near 20 ppm of contaminant'. Also, for heavy metals, that seems almost a very normal
and ok value for environmental/pharma-/food-grade-product "contamination".
AFAIK it is only for things like dangerous bacteria in plant-derived material, that "search tests" are performed, in which case
the analysis says "none detected". Less than (some small ppm value) is a pretty common threshold for many tests of
contaminants, including heavy metals, chem residues, fungi, bacteria, etc. and can even mean there are NONE detected.
And checking this piracetam synthesis paper: www.springerlink.com/index/T008273757278546.pdf, it seems that it is made from common organic chemicals which should not be subject to more heavy metal or other toxic substances than is common in most products/the environment...