Cedarwood oil: uses and limits of the evidence

Cedarwood oil is used in aromatherapy, but its health benefits should be described cautiously. NCCIH lists cedarwood among essential oils used in this practice. It explains that aromatherapy may involve inhaling oils or applying diluted oils to the skin.^[1]

Relaxation and sleep. A pleasant scent may be part of a relaxation routine, but that is different from demonstrating treatment of insomnia. NCCIH says there is little rigorous research on aromatherapy for insomnia and that its helpfulness remains uncertain.^[1]

Hair-loss research. A 1998 randomized trial in people with alopecia areata tested a blend of thyme, rosemary, lavender and cedarwood oils in jojoba and grapeseed carriers against the carriers alone. The blend group showed more improvement. Because the intervention combined several oils, the study cannot tell us whether cedarwood alone caused that result; this is a limitation inferred from the study design, not a finding about isolated cedarwood oil.^[2]

Those sources do not establish cedarwood alone as a treatment for acne, eczema or respiratory congestion. This page therefore makes no such claims. Fragrance use, a trial of a multi-oil blend and evidence for a medical treatment should be kept separate.