Sustainable Extraction of Bioactive Phenolics from Rose Hips for Functional Food Applications: Evaluation of Green Solvents and Extraction Techniques

What if the secret to greener food production lies in a solvent made from corn cobs and a molecule that sounds like a sci-fi character? A new study on rose hips reveals surprising winners and unexpected twists in the quest for sustainable antioxidants.

The hunt for sustainable functional foods has a new ally: rose hips. These humble fruits, packed with phenolic antioxidants, are at the center of a green extraction revolution. Scientists tested three emerging green solvents—γ-valerolactone (GVL), Cyrene™, and ethyl lactate—against conventional options, using maceration, ultrasound, and microwave-assisted extraction (MAE).

The results were clear: MAE consistently outperformed other techniques, delivering the highest yields and phenolic recovery, especially when paired with ethanol or ethanol/green solvent mixtures. Pure green solvents lagged behind ethanol, but a winning combination emerged—GVL with ethanol boosted both phenolic yield and antioxidant activity without interfering with standard assays.

Cyrene™, however, played a different game. It produced low extraction efficiencies and low phenolic levels, yet its extracts were uniquely selective and stimulated fibroblast migration in vitro. This hints at hidden functional benefits for health applications, beyond simple antioxidant power.

These findings pave the way for practical, sustainable extraction protocols in food, nutraceutical, and cosmetic industries. The future of green chemistry is not just about being eco-friendly—it's about discovering unexpected treasures in the process.

Key Points

• MAE gave highest yields and phenolic recovery
• GVL with ethanol boosted antioxidant activity
• Cyrene™ extracts stimulated fibroblast migration