The spleen, which plays a role in filtering blood and supporting immune health, sits on the left side of the body. Sleeping on that side may improve circulation and allow the spleen to function more efficiently.
The liver, located on the right side, benefits as well. Lying on the left reduces pressure on the liver, allowing it to process toxins more effectively while you rest.
For pregnant women, especially in later stages, left-side sleeping is often recommended. It improves blood flow to the placenta and reduces pressure on major blood vessels, supporting both mother and baby.
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