Boswellic acids and the calming claim
Frankincense resin contains boswellic acids - a family of triterpenoids studied for their anti-inflammatory activity. Most of the published research is on oral preparations of Boswellia serrata for joint inflammation, not on cosmetic topical use. In cosmetics, frankincense essential oil and resin extract are valued mainly for their skin-conditioning film-forming property and their warm-balsamic scent, not as a clinical anti-inflammatory.
Why we blend it with damascus rose
Frankincense oil is heavy and resinous; rose distillate is light and aqueous. Combined, they balance each other - the rose carries the water phase, frankincense dissolves in the oil phase, and the finished cleanser or scrub has a fuller-bodied feel than either alone. The pairing has been used in Levantine and Egyptian cosmetics for at least two millennia, partly for the scent and partly for this technical reason.