What it is
Cinnamomum Cassia Leaf Oil is a volatile essential oil distilled from the leaves of Cinnamomum cassia, the tree that yields cassia (Chinese cinnamon). It contains aromatic compounds such as cinnamaldehyde and is used primarily for its warm, spicy scent. In cosmetic products it functions as a fragrance and masking ingredient and is typically present at very low concentrations.
Safety & warnings
Cassia and cinnamon oils contain cinnamaldehyde and related constituents that are recognized fragrance allergens and can cause contact sensitization or irritation in susceptible individuals. EU labeling rules require disclosure of certain related fragrance allergens above set thresholds, and use levels in leave-on products are generally kept low. Patch testing is advisable for people with known fragrance or spice sensitivities.
Origin & sourcing
Natural essential oil obtained by distillation of the leaves of Cinnamomum cassia.
Questions everyone asks
Is cassia leaf oil a known allergen?
It contains cinnamaldehyde and related compounds that are recognized fragrance allergens and may cause sensitization in some people.
Why is it added to sunscreen?
It is used in small amounts as a natural fragrance to give the product a warm, spicy scent; it does not contribute UV protection.