Eivind Ertesvag 
Do you like sleeping on your side? Then keep doing it. Scientists have now looked into whether side-sleeping is good for your body — and which side is actually best.
The results were clear: The left side is the optimal sleeping position. Researchers have identified several health benefits linked specifically to sleeping on your left side.
Dr. John Douillard writes on LifeSpa that sleeping on your left side is especially beneficial. The research highlights three main reasons why this position can have a positive impact on your health:
1. Spine and breathing
Lying on your left side places the least strain on your back. Sleeping on your back puts pressure on the upper spine and hips, which can become taxing over time.
2. Digestion
Your digestion improves when you sleep on your left side, Douillard explains. Food travels more efficiently from the small intestine to the large intestine. It’s even recommended to rest on your left side for 10 minutes after eating — it actually helps your body digest food more effectively.
3. Lymph nodes
Most of the lymphatic system is located on the left side of the body. According to Douillard, sleeping on your left side helps the heart and spleen relax more easily, which is beneficial for your overall health. Over time, this sleeping position can even reduce stress.
4. Reduced heartburn
Sleeping on your left side can also reduce heartburn. This is due to the shape of the stomach and how it lies in relation to the esophagus. When lying on your left side, the valve between the esophagus and stomach stays closed more effectively, preventing stomach acid from flowing upward.
While there’s no one-size-fits-all sleeping position, research and expert opinions suggest that sleeping on your left side offers multiple health benefits. These include improved digestion, support for the lymphatic system, better spinal health, and reduced heartburn.
However, individual needs vary, so speaking with a healthcare professional can be helpful if you’re seeking personalized sleep and health advice.
Tips for better sleep
Start with the left side – Try it for a few nights and notice any changes in digestion, heartburn, or back discomfort.
Optimal head position – Use pillows that support the neck and keep your head slightly elevated.
Evening eating habits – Avoid large meals late at night. Ideally, your last meal should be 2–3 hours before bedtime.
Warm feet for quicker sleep – Sleep research shows that warm feet can help you fall asleep faster. Soft socks may make a difference.
Individual adjustments – If you have back issues or require another position, consult a physiotherapist or sleep expert for alternatives.
