While sleeping on your back has some benefits such as less breakouts, relieving congestions, it has greater negative effects. Sleeping on your back may cause blocked airway, sleep apnea, and back problems. Studies show sleeping on your side is healthier. Side sleeping helps prevent the airway from collapsing and may reduce snoring, it is also recommended for pregnant women as side sleeping can benefit both the mother and the baby. There is strong evidence and health benefits to sleeping on your side, therefore; I agree with this site and find it reliable regarding side sleeping being healthier than on your back.