Bioactive lipids, antiradical activity and stability of rosehip seed oil under thermal and photo-induced oxidation

Abstract

In the present report, the fatty acids, tocopherols, and sterol profiles as well as the total phenolics and carotenoids of rosehip (Rosa canina) seed oil were determined. The major fatty acids in the oil were linoleic and linolenic acids, comprising 54.80% and 23.47% of the total fatty acids, respectively. Other bioactive lipids in the oil included total tocopherols (786.3 mg/kg), total phenolics (37.97 mg/kg) and total carotenoids (218.8 mg/kg). Rosehip oil was rich in γ-tocopherol (472.0 mg/kg) and β‑sitosterol (78.0% of total sterols). The DPPH· (2,2′-diphenyl-1-picrylhydrazyl) radical scavenging activity of the oil showed 1.08 mg α-tocopherol/g oil and 4.18 μmol TEAC (Trolox equivalent antioxidant capacity)/g oil, respectively. The ABTS+ (2,2′-Azino-bis-3-ethylbenzothiazoline-6-sulphonic acid) radical scavenging activity of the oil showed 1.00 mg α-tocopherol/g oil and 3.02 μmol TEAC/g oil, respectively. The induction period (IP) of the oil was 3.46 h for the Rancimat test (110 °C), while the IP of oil in differential scanning calorimetry (DSC) test (100-150 °C) ranged between 0.26 and 58.06 min. The oxidative stability of the oil was determined under thermal and photo oxidation conditions. The progression of oxidation at 30 °C (under UV light) and at 60 °C (in the dark) was followed by recording the ultraviolet absorption (K232 and K270) and degradation of total tocopherols, γ-tocopherol and total carotenoids. Rapid deterioration occurred in the oil stored under UV light conditions. The information provided in the present work is of importance for using rosehip seed oil in different food and non-food applications.

Rose Hip Seed Oil: Methods of Extraction and Chemical Composition

“…Summary of the literature data on the oil extraction yield and fatty acid profile in R. canina seed oil from raw materials from Poland, Hungary, Germany, Bulgaria, and Turkey is given in Table . In almost all cases seed oil was obtained by extraction in Soxhlet apparatus, however, different solvents were used: hexane, petroleum ether, and diethyl ether . The oil content (4.07–12.90%) varied strongly depending on the variety of the raw material but also depending on its origin .…”

“…Almost all of the presented oils were obtained by extraction in Soxhlet apparatus and some with simple extraction . In most cases, hexane was used as a solvent, however, diethyl ether and petroleum ether were also used. The highest yield of seed oil extraction was found for R. subcanina (10.5%), and the lowest one for R. brunoni accessions (1.3–3.8%)…”

Stabilization of rose hip oil with pomegranate peel extract during accelerated storage

“…It was reported in the majority of articles that dominant components in rose hip seed oil are linoleic (35.94-55.70 %), α-linolenic (14.30-24.65 %), and oleic acid (13.17-22.82 %). 2,3,5,7,27,28 Variation in the rose hip seed oil composition was probably influenced by different factors such as genetic, climate, ecologic, soil conditions, as well as extraction type and conditions. 1,5 After accelerated aging, the content of linoleic acid (52.04-55.02 %) was not statistically different than at the beginning (55.01 %) of the experiment in all investigated samples.…”

“…2,3,5,7,27,28 Variation in the rose hip seed oil composition was probably influenced by different factors such as genetic, climate, ecologic, soil conditions, as well as extraction type and conditions. 1,5 After accelerated aging, the content of linoleic acid (52.04-55.02 %) was not statistically different than at the beginning (55.01 %) of the experiment in all investigated samples. Statistically higher content of palmitic and stearic acid was determined in the sample stabilized with pomegranate peel extract after accelerated aging, while the content of α-linolenic acid was statistically lower, than at the beginning of the experiment.…”

“…3 The quantity of oil in the rose hip seeds is between 5 and 18 % and it is known as a rich source of polyun-saturated fatty acids (PUFA), as well as tocopherols, carotenoids, sterols, phospholipids, and phenolic compounds. 1,4,5 It was reported previously that rose hip seed oil could be used for the treatment of eczema, skin ulcers, neurodermitis, cheilitis, skin scars, as well as for moisturizing and prevention of skin ageing. 6,7 Furthermore, it was noted that topical application of rose hip oil together with oral application of poly-vitamin preparation of fat-soluble vitamins could exhibit a synergistic effect.…”