Summary

Sleep problems are common in middle age, particularly among women in their 40s and 50s. In a new study published Sept. 1, 2026, in the Journal of Wood Science, researchers explored whether essential oils derived from Hinoki (Chamaecyparis obtusa), known as Japanese cypress, roots could help improve sleep quality. Participants reported fewer nighttime awakenings, improved morning feelings and brain-wave patterns suggesting smoother sleep onset.

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