One of the most significant reasons to sleep on your left side is its impact on heart function. The heart is located slightly on the left side of the body. Sleeping on your left side allows gravity to assist in lymph drainage and blood circulation, reducing pressure on the heart and helping it pump more efficiently during rest. This position may also benefit people with high blood pressure or heart-related issues.

2. Better Digestion and Detoxification

In Ayurveda (an ancient Indian health system), sleeping on the left side is believed to support better digestion. This is because our stomach and pancreas are located on the left side, and lying on that side can help food move more smoothly through the digestive tract. It also promotes better elimination of waste through the lymphatic system, especially the spleen, which is more efficient when you’re sleeping on the left.