The left-side sleeping position has gained attention because several studies have associated it with improved digestive comfort in certain situations.
When lying on the left side, the natural shape of the stomach may help keep stomach acid lower. For some people who occasionally experience heartburn, this position may feel more comfortable, particularly after a large meal.
This does not mean that everyone should immediately switch to sleeping on the left side. Comfort remains one of the most important factors for quality sleep. A position that causes shoulder pain, neck strain, or frequent waking may not be beneficial overall.
Many sleep specialists recommend experimenting with different positions and observing how the body responds over time.