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Author(s): Noorzaid Muhamad*, Resni Mona, Jannathul Firdous, Muhammad Haznil, Megat Muhamad Nazmi, Fatin Nabilah, Nur Izzah, Noor Nasuha

The study was conducted to compare how different types of meals (carbohydrates, fat, protein and fibre) affect the urine pH in individual. Thisis a laboratory based observation with cross sectional study, the cross-sectional study involved 25 MBBS students of UniKL RCMP with normal body mass index (BMI). The method is to take pre-urine samples (20 ml sample bottle provided) from respondents and measure the urine pH using pH meter. The pre-urine samples are taken after the respondent being put to a fasting period of 10 hours. Then, they are given a specific meal. Within 2 hours, the post urine sample are taken and tested with pH meter and the result was taken again 2 hours after that. These are implemented for four days as each day for specific nutrient meal (carbohydrate, protein, fibres and fat). Overall, protein and fat shows changes that agrees with our assumption that is there will be increase in urine pH after meals ingestion that would be from pre to post 1 and decrease back from post 1 to post 2. On the average, carbohydrate and fibre shows increase in urine pH from pre to post 1 and from post 1 to post 2. The changes in urine pH from pre to post 1 agrees with our initial assumption, but the increase in urine pH from post 1 to post 2 is in contrast to our assumption. We can infer that among the four types of meals tested against their influence on urine pH, protein has the strongest influence, followed by fat, carbohydrate and dietary fibre.

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