Assessment of intake of caffeine in random population in Riyadh and its levels in some food by HPLC

This study involves 160 Saudi females of a mean age of 23±3.7 years who regularly consumed coffee and soft drinks. The highest percentage of participants were reported to consume less than 300 mg of caffeine daily (42.5%) and the highest level of caffeine consumption (more than 2800 mg/day) was calculated among 7.5% of the participants. The highest percentages of participants consuming caffeine were detected in coffee consumers followed by soft drink consumers (93.75% and 90.63% respectively), while the least percentage was detected in tea consumers (45.63%). The mean of consumed caffeine from coffee was the highest value (1599±416.7) compared with the caffeine content in other foods. In relation to anthropometric measurements, there were no significant correlations between them and the level of caffeine consumption except weight. There was a significant correlation between the decrease in body weight and the increase in amount of caffeine consumed (p 0.05). On the other hand, there was no significant correlation between the hours of sleep and food consumption, and the amount of caffeine consumed (p 0.05). There was, however, a high correlation between the employment status of the participant and the caffeine consumption (p 0.05).