Oil/Water Biphasic Solvent System for the Eco-Extraction and Cosmetic Formulation of Bixa orellana L.

What if your next anti-aging cream could be brewed like a cup of tea—using just water, oil, and a little ultrasound? Scientists have found a way to turn achiote seeds into a cosmetic powerhouse in one single green step.

Annatto, the vibrant orange pigment from achiote seeds, is already a kitchen staple in many cuisines. But this natural colorant is also a treasure chest of bioactive compounds, including bixin and apocarotenoids. Now, researchers have optimized a green extraction method that uses a simple biphasic system of water and oil to pull out both polar polyphenols and less polar compounds like δ-tocotrienol and bixin—all at once.

The team tested five different vegetable oils as the oil phase. Refined sunflower oil came out on top, outperforming virgin olive, jojoba, coconut, and grapeseed oils. Both the water and oil phases showed impressive antioxidant activity. The oil phase contained 0.9% bixin, along with minor apocarotenoids and δ-tocotrienol, while the aqueous phase revealed twelve phenolic compounds and the volatile fraction boasted twenty-one compounds.

But the real magic? They combined extraction and cosmetic formulation into a single, seamless process. This means the resulting oil phase isn't just an extract—it's already a cosmetic ingredient. It's a step toward sustainable beauty, where the line between nature and lab blurs elegantly.

Key Points

• Green biphasic water-oil extraction recovers polyphenols and bixin simultaneously.
• Refined sunflower oil outperforms olive, jojoba, coconut, and grapeseed oils.
• One-step process combines extraction with cosmetic formulation.