A deep dive into herbal extraction: Techniques, trends, and technological advancements.

Area of Science:

• Pharmacognosy
• Phytochemistry
• Natural Product Chemistry

Background:

• Herbal extraction is vital for isolating active compounds in traditional and modern medicine.
• The pharmaceutical and nutraceutical industries increasingly blend traditional knowledge with advanced extraction technologies.

Purpose of the Study:

• To comprehensively review herbal extraction processes, including pre-treatment, solvent selection, and various extraction techniques.
• To analyze patent trends and guide practitioners in optimizing herbal extract production for medicinal and nutraceutical applications.

Main Methods:

• Exploration of drying, size reduction, and solvent selection (water, methanol, natural deep eutectic solvents - NADES).
• Detailed examination of extraction methods: liquid-liquid, solid phase, solid-liquid, infusion, decoction, pressurized liquid extraction (PLE), and microwave-assisted extraction (MAE).
• Discussion on synergistic effects of combined extracts and strategic method selection.

Main Results:

• Diverse extraction techniques, from traditional to modern (e.g., MAE, PLE), are evaluated for efficacy and suitability.
• Natural deep eutectic solvents (NADES) are highlighted as promising alternatives.
• Patent trends indicate ongoing innovation in herbal extraction technologies.

Conclusions:

• Strategic selection of extraction methods is crucial for balancing biological activity with practical considerations.
• Optimized herbal extraction ensures premium-quality extracts for pharmaceutical and nutraceutical use.
• This review provides practical knowledge to advance herbal medicine and product development.