Ghaly & Teplitz (2004) – The biologic effects of grounding the human body during sleep as measured by cortisol levels and subjective sleep, pain, and stress
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Published in: Journal of Alternative and Complementary Medicine (2004)
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Found that grounding during sleep reduced night‑time cortisol and improved sleep and stress symptoms in people with sleep dysfunction, pain & stress after 8 weeks of grounded sleep.
Read; https://pubmed.ncbi.nlm.nih.gov/15650465/