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The deleterious effects of lipid autoxidation are of major concern to the food industry and can be prevented by food antioxidants. In this vein, the phenolic contents and antioxidant potential of traditional plants of Mauritius such as P. betle L. (Piperaceae), M. koenigii L. Sprengel. (Rutaceae), O. gratissimum L. (Lamiaceae), O. tenuiflorum L. (Lamiaceae), and commercially available Mauritian green and black teas were evaluated. Their ferric reducing antioxidant power (FRAP) were compared to that of butylated hydroxytoluene (BHT) with the following order of potency: BHT &gt; "Natural" commercial green tea &gt; "Black Label" commercial black tea &gt; O. gratissimum &gt; P. betle &gt; O. tenuiflorum &gt; M. koenigii. The trolox equivalent antioxidant capacity (TEAC) assay reflected a similar antioxidative order for BHT and "Natural" commercial green tea, with however P. betle, O. tenuiflorum and O. gratissimum exhibiting higher activities than "Black Label" commercial black tea and M. koenigii. Based on their potent antioxidant capacity, P. betle (0.2 % m/m) and O. tenuiflorum (0.2 % m/m) extracts, and green tea (0.1 % m/m) infusate were compared with BHT (0.02 % m/m) on their ability to retard lipid oxidation in unstripped sunflower oil and mayonnaise during storage at 40 °C. P. betle and green tea were more effective than BHT in both food systems. Moreover, odour evaluation by a sensory panel showed that the plant extracts and green tea infusate effectively delayed the development of rancid odours in unstripped sunflower oil and mayonnaise (p &lt; 0.05).

Polyphenolic rich traditional plants and teas improve lipid stability in food test systems