American Journal of Food Science and Health
Articles Information
American Journal of Food Science and Health, Vol.5, No.4, Dec. 2019, Pub. Date: Dec. 27, 2019
The Effect of Raisins on Short-term Memory, a Pilot Randomized Controlled Trial
Pages: 179-189 Views: 260 Downloads: 186
Authors
[01] Chong Zhen Xing, Faculty of Medicine, Melaka Manipal Medical College, Johor, Malaysia.
[02] Kalaivani Maniam, Faculty of Medicine, Melaka Manipal Medical College, Johor, Malaysia.
[03] Alagunathan Alagarraj, Faculty of Medicine, Melaka Manipal Medical College, Johor, Malaysia.
[04] Syed Lukman, Faculty of Medicine, Melaka Manipal Medical College, Johor, Malaysia.
[05] Aswin Velu Vengadeshwaran, Faculty of Medicine, Melaka Manipal Medical College, Johor, Malaysia.
Abstract
Raisins are originate from dried grapes and are also one of the most commonly consumed dried fruits across the globe. Raisins is the highest quintile of food because of their potential to provide physiologic antioxidants to tissue cells. Golden seedless raisins contains mean total ORAC of 10450 μmol TE/100 g. The recommended ORAC units per day is 3000-5000 μmol TE. High level of antioxidants is believed to be beneficial in enhancing short term memory. Raisins also have beneficial effects on glycemia/insulinemia, postprandial insulin response, cardiovascular risk factors, oral health, blood pressure and satiety. The study design was randomized controlled trial. The study population was batch 39 MBBS in MMMC Muar campus comprising 146 students. The sample size was 37 in total, 18 was randomized into intervention group and 19 was randomized into control group by using block randomization. All 37 participants were asked to do the test on number, verbal and visual memory by using www.humanbenchmark.com in computer lab before the intervention starts. The memory scores were recorded in Microsoft Excel. The participants in the intervention group were given 50g of raisins everyday for 3 consecutive days whereas the participants in the control group were not given any raisin. After 3 days, all 37 participants were again tested on number, verbal and visual memory by using www.humanbenchmark.com in computer lab. The memory scores were recorded in Microsoft Excel and analysed by using graphpad.com and epiinfo. Based on our results from the study, there were no significant differences in visual memory, verbal memory, number memory as well as total memory between intervention and control groups. Even after adjusting the baseline memory scores, there were no significant differences in the verbal memory, number memory and visual memory between intervention and control groups. However, the participants who consumed raisins for 3 days had higher visual memory and number memory scores than participants in the control group. Since intervention (raisins) was given to intervention group only, comparison between before and after the raisin consumption in the intervention group, there were no significant differences in visual memory, verbal memory, number memory and total memory between before and after raisin consumption. In conclusion, raisins can improve visual memory and number memory since it is knons as a good source of antioxidant. They were beneficial to human’s memory and cognitive performance. A regular and optimum intake of raisins was recommended for everyone
Keywords
Raisins, Randomized Controlled Trial, Memory
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