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October 7, 2026

6 health benefits of sleeping on your left side

The position you sleep in could influence more than just your comfort. According to Bored Daddy, sleeping on the left side may offer a range of benefits for digestion, circulation and immune function — all tied to the anatomy of organs located on that side of the body.

Person sleeping on left side in a quiet bedroom at night
Illustration © etreheureux.net

In brief

  • —Left-side sleeping may reduce acid reflux symptoms
  • —The spleen, liver and thoracic duct all sit on the left side
  • —Gravity plays a key role in several of the claimed benefits

Acid reflux and heartburn: why position matters

For people living with acid reflux or gastroesophageal reflux disease (GERD), nighttime can be particularly uncomfortable. Sleeping on the left side is said to help by keeping the stomach positioned lower than the esophagus, which reduces the likelihood of acid travelling upward and triggering heartburn.

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