Researchers analyzed data from 70 studies and found that social isolation was linked to an increased risk of early death, while social relationships positively influence health. A report found that obese women have a higher risk of developing certain cancers, including breast, pancreatic, and bowel cancers. A study showed that vitamin D supplements helped reduce chronic pain in patients. A small study suggests prenatal yoga may help ease depression in pregnant women. Research found that seatbelt use reduces risks of traumatic brain and other injuries from car accidents, though it doubles the risk of some back sprains. A long-term study found that daily multivitamin use was linked to an 8-27% lower risk of cancer diagnoses in older men.