Sclerocarya Birrea Seed Oil
Also known as Marula Oil, Marula Seed Oil
“CIR Expert Panel says: safe as used in cosmetics.”
A 2015 randomized controlled trial (n=20, PMID 26528587) found marula oil to be non-irritant on topical application (p<0.001) and demonstrated significant moisturizing, hydrating, and occlusive effects. The oil's fatty acid profile is dominated by oleic acid (~69%), followed by palmitic (~15%) and linoleic (~9%), which are biomimetic to skin lipids. A 2023 NMR-based characterization study (PMID 37515510) established analytical methods for oil authentication and confirmed consistent compositional profiles across geographic sources.
Non-irritant in clinical patch testing at topical use concentrations
Moisturizing and hydrating — statistically significant effect on dry skin
Occlusive effect on normal skin, reducing transepidermal water loss
High oleic acid content (~69%) is biomimetic to skin surface lipids
CIR Quick Reference Table (12/2017, revised 07/2018) — Sclerocarya Birrea Seed Oil row: Finding=S, Citation=IJT 36(Suppl. 3):51-129, 2017
“Sclerocarya Birrea Seed Oil | S | | IJT 36(Suppl. 3):51-129, 2017”— QRT-122017revised072018.pdf, p. 116