Supplements that are often cited for improving sleep quality include:

1. Melatonin: A hormone that helps regulate the sleep-wake cycle. Studies have shown that melatonin can significantly improve subjective sleep quality¹.
2. Amino Acids: Certain amino acids (such as tryptophan) have been found to improve sleep quality. These amino acids are precursors to neurotransmitters involved in sleep regulation¹.
3. Vitamin D: Some research suggests that vitamin D supplementation can improve sleep quality, although results vary and more research is needed¹.
4. Magnesium: This mineral is known for its muscle-relaxing properties and can contribute to improved sleep.
5. Zinc: Zinc is involved in numerous bodily functions, including sleep regulation, and has shown potential in improving sleep quality in some studies.
6. Resveratrol: An antioxidant that might have beneficial effects on sleep quality, but more research is required for conclusive evidence.
7. Nitrate: Some studies suggest that nitrate supplementation could improve sleep quality, though further research is necessary¹.

If you would like product recommendations containing these ingredients, please let me know!

Footnotes

1. Efficacy of dietary supplements on improving sleep quality: a systematic review and meta-analysis - PubMed ↩ ↩² ↩³ ↩⁴