Four Loko — the controversial caffeinated alcoholic beverage — will no longer be made with caffeine, taurine and gaurana, announced its makers, Phusion Projects, two weeks ago. Before the caffeinated “black out in a can” gets pulled completely from shelves, the Science Section presents: The Science Behind Four Loko (the caffeinated version).

On the heels of the Salmonella-contaminated peanut product recall, the Food and Drug Administration and California Department of Public Health are now investigating Salmonella contamination in pistachio products from a farm in California. Amidst the investigation, both are advising consumers to avoid eating any product containing pistachios until it can be determined what specific products have been contaminated.