AI Article Synopsis
- Consumption of commercial soft drinks and tea has increased, leading to concerns about high levels of ascorbic acid (vitamin C) in these beverages.
- Three subjects tested various brands of soft drinks and three tested green teas over several days, collecting urine samples to assess the impact of ascorbic acid on urine tests for occult blood and sugar.
- The study found that ascorbic acid caused false negative results in both tests, highlighting the importance of patient education regarding beverage consumption prior to urinalysis.
Article Abstract
Consumption of commercial soft drinks or tea has increased in over recent years. In many case, these drinks contains large amount of ascorbic acid as an antioxidant. We examined the influence of ascorbic acid to the result of urine occult blood and sugar tests with urinalysis reagent strips. Three subjects took 3 brands of soft drinks (P, C, B) in 3 different days once in the morning. Other 3 subjects took 4 brands of green tea in 4 different days 4 times in a day. After 2 hours of first administration, urine specimen were collected every hour for 8-10 hours. Constant amount of hemoglobin or sugar was added in urine specimen and the reflectance was measured with AX-4280. As a results, urine ascorbic acid induced false negative results in both occult blood and sugar tests in all groups. These results indicate the necessity of patient education about commercial soft drinks or green tea consumption on the previous night and the day of the urinalysis.
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