One major advantage is the reduction of nighttime heartburn. For those dealing with acid reflux or GERD, sleeping on the left side helps keep the stomach below the esophagus, minimizing the risk of acid flowing back up and causing discomfort during sleep.

Another key benefit is the improved function of the spleen and liver. The spleen, located on the left side, filters blood and supports the immune system. Left-side sleeping enhances blood flow to this organ, making it more efficient. It also reduces pressure on the liver, which helps it process toxins more effectively. In contrast, sleeping on the right can hinder these important processes.

The lymphatic system also benefits from left-side sleeping. This position encourages optimal drainage into the thoracic duct, which improves the removal of waste and toxins. A well-functioning lymphatic system supports immunity by distributing white blood cells more efficiently throughout the body. Left-side sleeping thus plays a vital role in maintaining detoxification and immune health.

For pregnant women, especially in later stages, left-side sleeping is highly recommended. This position improves circulation by relieving pressure on the liver and enhancing blood flow to the fetus. It can also help reduce swelling in the legs and feet, offering comfort and health support during pregnancy.

Digestion is another area that sees improvement with left-side sleeping. The ileocecal valve, located on the left, benefits from gravity in this position, helping food move more smoothly through the digestive tract. This can aid in more regular bowel movements and reduce digestive discomfort.