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I would hope they investigate whether the ingestion of "disease-detecting nanoparticles" increases one's risk of cancer.

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I don't see why you're being downvoted. What about the accumulation of nanoparticles among cells, do they traverse the cell membrane? Can they cause cell withering or dysfunction, alter gene expression, hormonal balance or cause microcuts? What about when they degenerate?

These aren't amateurs.

http://en.wikipedia.org/wiki/Scotchgard

This product was not made by amateurs and was on the market for about 30 years. Its key component was perfluorooctanesulfonamide, a precursor to perfluorooctane sulfonate, which lingers in the human body for five and a half years and can cause developmental delays, cancer, immune disorders, and all kinds of other things.

Amateurs can exercise due diligence and professionals can miss things.

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