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May support slow-wave and REM sleep architecture, per a placebo-controlled polysomnography study in younger and older adults (Copinschi et al., 1997, Neuroendocrinology, PMID 9349662)
Low vitamin D can cause symptoms like fatigue, bone or muscle aches, and in severe cases, weak bones
Trouble falling asleep points to different triggers than waking early, waking gasping, or feeling exhausted despite enough time in bed
Discuss any medical conditions or medications with your provider
10.1002/JPER.17-0530 184
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