90% of people sleep in the wrong position without realizing it: Sleeping on this side is actually a “lifesaver” for the body

Sleeping on your left side is considered a position that improves circulation and digestion, helping you sleep more soundly. Below are five important health benefits of this sleeping posture.

1. Supports proper lymphatic drainage
According to scientists, sleeping on the left side is the most natural position for the human body. This posture helps improve the lymphatic system, which is responsible for transporting essential substances such as proteins, glucose, and metabolic waste. Since lymphatic drainage primarily occurs on the left side, lying on this side supports more effective detoxification.

2. Improves digestive function
You may not realize it, but both the stomach and pancreas are located on the left side of the body. Sleeping on this side helps the stomach secrete digestive juices and supports the pancreas in releasing important enzymes. As a result, digestion tends to work more smoothly when you sleep on your left side.

3. Enhances cardiovascular health
Studies show that more than 80% of the heart lies on the left side of the chest. Therefore, sleeping on your left side is recommended to promote better blood flow back to the heart and support overall cardiovascular health.

4. Helps you feel more alert
If you often take naps or rest after meals, sleeping on your left side is a particularly good choice. Scientists suggest that this position helps you feel more alert compared to sleeping on your right side.

5. Improves spleen health
The spleen, an essential part of the lymphatic system responsible for filtering blood, is also located on the left side of the body. Sleeping on the left side allows gravity to assist fluid flow to the spleen more efficiently, significantly supporting its function.

Tips for building the habit
Most sleeping positions are shaped by habit. If you are not used to sleeping on your left side, practice gradually. Scientists recommend starting by lying on your back, then after 1–2 minutes gently turning onto your left side. Repeating this regularly can help form the habit and improve sleep quality over time.

In addition to adjusting your sleeping position, you should also pay attention to factors such as lighting, electronic devices, blankets, pillows, mattresses, and even sleepwear to ensure truly restorative sleep.