Vitamin D proves its importance yet again. An Australian study published in Pediatrics tracked maternal vitamin D levels during pregnancy, and found that those with low levels were more likely to have babies with language problems. The babies’ language development was assessed at ages 5 and 10. Mothers who were low on vitamin D at 18 weeks of pregnancy were nearly two times as likely to have kids with problematic language delays than women with normal levels. The researchers recommend that vitamin D supplements during pregnancy might help reduce the risk.