I think you should read the entire thread. Wasn't just color (with the Test C etc) but sediment with NPP. that will NOT dissolve and has to be filtered and factored OUT but purity would be all out of wack.
They cannot have possibly manufactured this NPP. There is NO way it would pass QC and the COA for NPP.
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Assay: 98%min(HPLC)
AND ALSO:
Color: White to Off-White Solid powder
They didn't bother to QA the product because they didn't manufacture it, thus the silence...