Oleoside is primarily known for its presence in olive oil and olive plant extracts, where it contributes to the natural defense mechanisms of the plant. In applications, it serves as a key biomarker for detecting olive oil authenticity and quality, helping to distinguish genuine extra virgin olive oil from adulterated products. Due to its structural properties, oleoside exhibits antioxidant activity, making it of interest in cosmetic formulations aimed at protecting skin from oxidative stress and aging. It is also studied for potential anti-inflammatory effects, particularly in natural health products and nutraceuticals targeting metabolic and cardiovascular health. Research explores its role in promoting cellular protection and modulating biological pathways related to chronic diseases, supporting its use in functional foods and dietary supplements.