Huge mugs of coffee
“I try to avoid excessive caffeine,” says Dr. Mamta M. Mamik, Assistant Professor of Obstetrics, Gynecology and Reproductive Science at the Icahn School of Medicine at Mount Sinai.
“An adult can safely consume up to 400 milligrams of caffeine a day—which is equivalent to four 8-ounce cups of coffee—but drinking any more than that can cause calcium excretion, which, over time, may lead to osteoporosis. Avoiding excess caffeine also helps to ward off uncomfortable withdrawal symptoms like lethargy, insomnia, headaches, and irritability.”