This study aimed to obtain antioxidant peptides from perilla seed meal (PSM), which is normally discarded as an industrial waste during seed oil extraction. PSM protein was hydrolyzed using trypsin and fractionated by ultrafiltration. Molecular weight fraction (<3 kDa) with the highest antioxidant activity was purified using prep‐HPLC and analytical HPLC. The purification fold of the peptide (fraction V) obtained from PSM protein hydrolysate on DPPH radical scavenging activity, ABTS radical scavenging activity, and reducing power was 1.79‐, 1.59‐, and 1.81‐fold, respectively, after the three‐step purification procedure. The sequence of the purified peptide from fraction V that exhibited free radical scavenging activity and reducing power was identified as Ile‐Ser‐Pro‐Arg‐Ile‐Leu‐Ser‐Tyr‐Asn‐Leu‐Arg (1,330.77 Da). These results demonstrate that PSM protein, a by‐product from the oil seed extraction, can be used as a source of natural antioxidant peptides for food and/or nutraceutical applications.

The present study aimed to decompose perilla seed meal (PSM) proteins via enzymatic degradation and to evaluate the functional properties of the resulting enzymatic hydrolysate and peptide fractions for utilization of PSM, a by-product in the production of perilla seed oil. PSM protein...

Adenophora triphylla is commonly used in food materials and oriental medicine as an analgesic, anti-inflammatory, and antitussive. In the present study, the leaves and roots of A. triphylla were extracted with water and ethanol, respectively, to examine the extracts' in vitro antioxidant activities and total phenolic contents, as well as A. triphylla's potential as a new functional food source and safe and inexpensive supply of antioxidants. Different antioxidant tests were employed and the results were compared with ascorbic acid as a standard antioxidant. The total extractable contents of phenolic compounds and flavonoids, which relate to antioxidant activity in medicinal plants, were also measured. The leaf extracts had notable levels of total phenolics and flavonoids and showed high radical and nitrite scavenging activities as well as inhibition activity against enzymes that induce oxidation. These results suggest that A. triphylla leaves are a potential ingredient for food supplements and a natural source of antioxidants.