Processing and storage effects on the oxidative stability of hemp (Cannabis sativa L.) oil‐in‐water emulsions

Abstract

Hempseed oil was used to form oil-in-water emulsions, and the effect of heating, storage and light on the oxidative stability of the dispersed phase was investigated. Lipid oxidation rate increased following thermal processing and light exposure, whereas oxidation markers remained relatively unaffected during emulsions storage at 4°C for 10 days. Induction times of the emulsions were reduced up to 26% and the concentration of thiobarbituric acid reactive substances increased up to 4.5-fold, depending on the processing conditions. Selected berries as potential sources of natural antioxidants were screened for polyphenol and anthocyanin content in order to investigate their ability to retard lipid oxidation in comparison with a commercially available synthetic counterpart. Raspberry powder extract significantly improved the oxidative stability of hemp-based emulsion compared with the control and was even more effective compared to a synthetic antioxidant when samples were subjected to heat treatment.

Quality Traits of “Cannabidiol Oils”: Cannabinoids Content, Terpene Fingerprint and Oxidation Stability of European Commercially Available Preparations

“…The quality of Cannabis macerated oils has already been investigated in previous research demonstrating the importance of selecting correct preparation methods and conditions as well as studying the evolution of major and minor compounds (cannabinoid and terpenes) during storage in order to define the ideal shelf-life and management guidelines (storage temperature) [ 12 ]. Oxidation products derived from fatty acid degradation during the storage period of macerated oils are critical for overall formulation stability [ 27 , 28 ]. Galenic preparations are usually prepared by using pharmacopeia grade olive oil (FU) to minimise the formation of large quantities of aldehydes and ketones that can also influence the digestibility of the macerated oil [ 9 , 12 , 29 ].…”

Formulation, Characterization and Properties of Hemp Seed Oil and Its Emulsions

“…Due to reduced sizes of droplets and high surface to volume ratio, loading of the oil in nanoemulsions may improve the bioavailability of present unsaturated fatty acids [ 7 ], help to protect the oil against oxidation and interaction with other ingredients, and contribute as a dietary source of natural antioxidants for disease prevention and health promotion [ 9 , 17 ]. Only a few studies have actually dealt with hemp seed oil emulsions (water-in-oil) while, as far as the authors are aware, even less research has concentrated on oil-in-water emulsions [ 18 , 19 ].…”

Comprehensive Insight into Cutaneous Application of Hemp

“…The influence of processing parameters (temperature, storage, and light exposure) on the process of oxidation of hemp oil as a dispersed phase in emulsion with soy lecithin as an emulsifier was investigated. The results have shown that the hemp oil in the aqueous environment of the emulsion can be susceptible to oxidation catalyzed by light and temperature and, therefore, demands the presence of antioxidants in the formulation [ 58 ].…”