The 59-year-old man had purchased the bat guano — described as a “natural superfood” for cannabis plants due to its high nutrients — from an online store, according to the study.

But, bat guano can also contain harmful spores from ... He died soon after, despite the doctors’ best efforts to treat him.

Drying and Subsequently Washing with Water. If the guano, as is generally the case with those varieties that are brought from Peru and Chili, is a smooth and uniform powder, weigh out two ounces ...

Common guano is a mixture of ammenia- cal salts and earthy phosphates, and is composed of the excresences of sea fowl, deposited on islands in the sea, in latitudes where no rains fall.