Bioavailability of Bioactive Molecules from Olive Leaf Extracts and its Functional Value

Area of Science:

• Food Science
• Pharmacology
• Biochemistry

Background:

• Olive leaves are a rich, affordable source of bioactive compounds.
• Phenolic compounds in plants offer significant health benefits.
• Understanding the stability of these compounds during digestion is crucial for their efficacy.

Purpose of the Study:

• To evaluate the in vitro digestibility of olive leaf aqueous extract.
• To assess the impact of simulated digestion on phenolic compounds and bioactivities.
• To determine the potential of olive leaf extract as a nutraceutical.

Main Methods:

• Simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) digestion.
• Quantification of total phenolic content.
• Assay of antioxidant, antimicrobial, and cytotoxic activities.
• Evaluation of U937 cell line response.

Main Results:

• Phenolic content decreased by 60% in SGF and 90% in SIF.
• Antioxidant activity reduced by 10% (SGF) and 50% (SIF) but remained high.
• Extract demonstrated combined antimicrobial action and dose-dependent cytotoxicity against U937 cells.

Conclusions:

• Olive leaf aqueous extract maintains beneficial properties post-simulated digestion.
• Regular consumption may help manage oxidative stress-related diseases and bacterial infections.
• Olive leaf extract shows potential for cancer prevention and treatment.