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Consumer awareness of the importance of functional foods has greatly grown in the past years. Functional foods with elevated levels of antioxidants are of high demand because of its associated health benefits. As bread is a common component in our daily diet, it may be convenient food to deliver antioxidants at a high concentration. The main approach of this study is to incorporate Kappaphycus alvarezii seaweed powder (SWP) and white flour in the bun formulation in order to develop seaweed bun with higher level of phytochemicals. The fresh Kappaphycus alvarezii seaweeds were washed, soaked in distilled water overnight, dried in a cabinet dryer at 40°C for 24 hours and ground into fine powder using universal miller. There were five different percentages of SWP incorporated into bun that were formulation A - control (0% SWP), B (3% SWP), C (6% SWP), D (9% SWP) and E (12% SWP). All the samples were undergone texture, total phenolic content and DPPH analysis. Seaweed concentration had most significant effect on phytochemical constituents of the bun with TPC (35.07 GAE, mg/100g) and DPPH activity (49.02%) maximized when 12% SWP was incorporated into the flour (P<0.05). The incorporation of the SWP also gives significant effects towards the texture of the bun where the bun becomes harder and denser as compared to the control. [ABSTRACT FROM AUTHOR]