If you’ve ever wondered whether your sleeping position affects your health, the answer is yes—especially if you sleep on your left side. This simple habit can offer surprising benefits for your digestion, brain health, and more.
One of the key advantages of left-side sleeping is its ability to improve digestion. Because the stomach is on the left side of the body, lying on this side allows gravity to help move food through the digestive tract. This can reduce symptoms like bloating, heartburn, and constipation.
Left-side sleeping also supports the brain’s waste-clearing process, known as the glymphatic system. Studies suggest that side sleeping helps the brain eliminate metabolic waste more effectively, which may lower the risk of conditions like Alzheimer’s and Parkinson’s.

For pregnant women, sleeping on the left side is particularly beneficial. It improves blood flow to the placenta, ensuring the baby gets the nutrients and oxygen it needs.
To make the switch to left-side sleeping, start with a supportive pillow and mattress. Placing a pillow between your knees can help align your spine and reduce pressure on your hips and lower back.
However, left-side sleeping isn’t for everyone. Some people may experience shoulder or hip pain, especially if their mattress isn’t the right firmness. Those with sinus congestion or glaucoma might also find that side sleeping increases facial pressure.
At the end of the day, the best sleeping position is the one that feels most comfortable for you. But if you’re looking to improve your digestion, support your brain health, or enhance circulation, left-side sleeping is worth a try.