Dogs eat poop everywhere. In San Francisco, some claim it’s for meth
Rolling Stone: Ryan Marino, assistant professor at the School of Medicine, discussed social media misinformation around how amphetamines are metabolized. “Amphetamines like meth (methamphetamine) are metabolized (into different breakdown products) and then excreted in the urine,” said Marino. “People who use meth do not just defecate usable meth.”