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Articles by Khalid S. Al-Numair
Total Records ( 2 ) for Khalid S. Al-Numair
  Khalid S. Al-Numair
  This study was designed to evaluate the effect of cigarette smoking on hypertension and the serum levels of lycopene, β-carotene and α-tocopherols in relation to the concentration of oxidative marker malondialdehyde (MAD). In addition, serum levels of low density lipoprotein-cholesterol (LDL-C) and high density lipoprotein cholesterol (HDL-C) and their specific apolipoproteins B and A1 (Apo B and A1), respectively, were evaluated in cigarette smokers. Two hundred healthy men (100 smokers and 100 non-smokers) aged between 30 and 50, from Jeddah, the second largest city in Saudi Arabia, volunteered to participate in this study. The mean systolic and diastolic blood pressure values were found to be significantly (p<0.05) higher for smokers than for non-smokers. The serum concentrations of lycopene and β-carotene were significantly (p<0.05) lower in cigarette smokers than in non-smokers whereas a slight decrease (not significant) in serum α-tocopherol was observed in smokers. In the same respect, there was a significant (p<0.05) increase in the oxidative marker (MAD) in smokers. So, the Pearsons correlation coefficient for the serum lycopene and β-carotene levels and the serum malondialdehyde concentration in smokers were significantly inversely (p<0.05) higher than that of non-smokers, whereas no significant correlation between serum α-tocopherol level and MAD concentration was observed in both smokers and non-smokers. Accordingly, smoking was shown to significantly (p<0.05) increase LDL-C and its specific apo B, but significantly (p<0.05) decrease HDL-C and specific apo A1. This makes the risk of chronic diseases and death higher in smokers. The obtained results indicate that lycopene and β-carotene are the most potential antioxidant, while α-tocopherol play a secondary role in the cigarette smoke free radical scavenge.
  Abdullah H. Al-Assaf and Khalid S. Al-Numair
  The aim of this study was to investigate intake of macronutrients and its relation to Body Mass Index (BMI) as well as intake of selected micronutrients in urban and rural healthy adults in Riyadh region-Saudi Arabia. 170 health adults were recruited, 85 of which were urbans and 85 were rurals. Three consecutive days food records were collected and dietary intakes were analyzed by the food processor and other food composition tables. Results showed high intake of macronutrients and prevalence of overweight and obesity in both groups with no significant differences. Subjects of both groups also had high intake of saturated fat. Results also showed inadequate intake of vitamin D, calcium and folate. Few of the participants of both groups had inadequate intake of vitamin C. Intakes of vitamin B1, vitamin B3, iron, vitamin B12, vitamin B6 and vitamin B2 was adequate. No significant differences between the two groups were observed except for vitamin D, calcium and vitamin B2 that their mean intakes were significantly higher in urban group compared to rural group. Mean intake of vitamin B3 was higher in rural group compared to urban group. These findings suggested that overweight and obesity among adult Saudis are due to high intake of macronutrients combined with inadequate intake of some micronutrients, which are results of non-balanced diet and inappropriate consumption patterns. The study also suggests that there is a need of increasing the nutritional education and awareness among adult Saudi males.
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