|
Function
|
How Position Influences It
|
|---|---|
|
✅ Acid flow from stomach to esophagus
|
Gravity can help keep it where it belongs
|
|
✅ Gastric emptying (how fast food leaves the stomach)
|
Some positions may speed or slow it slightly
|
|
✅ Lymphatic drainage
|
The body’s waste-clearing system favors left-side flow
|
|
✅ Organ alignment
|
Stomach, pancreas, and intestines shift subtly with posture
|
While sleep position won’t cure chronic conditions, small changes can reduce irritation — especially in people already prone to reflux.
🧪 Why Left-Side Sleeping Helps (Backed by Science)
1. Reduces Nighttime Acid Reflux (GERD)
The stomach sits below the diaphragm, curving toward the left upper abdomen.
When you lie on your left side:
- The junction between your esophagus and stomach (the lower esophageal sphincter) stays above the level of stomach contents
- This makes it harder for acid to splash upward In contrast, lying on the right side:
- Positions the stomach higher than the esophagus
- Creates a slope that encourages acid to flow back up
A 2005 study published in The American Journal of Gastroenterology found: