Despite not being a nut, if classified with nuts, peanuts have the most protein, at 8 grams per ounce. Pistachios and almonds come next with 6 grams per ounce, and cashews with 5 grams.

The almond industry is all too familiar with concerns over contaminated nut shells. In 2000 and 2004, two outbreaks of Salmonella Enteriditis linked to whole, raw almonds sickened 177 and 47 ...