Something puzzling happens when humans lactate. Milk production requires boatloads of calcium, which the body pulls from bones. Typically, this would cause significant bone loss. Yet, somehow, most people who lactate seem to maintain their bone health. This mystery has baffled researchers. Now, they think they’ve discovered the key ingredient: a newfound hormone in mice they’ve dubbed the maternal brain hormone. With more research, scientists think it could even help treat fractures and osteoporosis.
