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Al-Jafar R, Wahyuni NS, Belhaj K, Ersi MH, Boroghani Z, Alreshidi A, Alkhalaf Z, Elliott P, Tsilidis KK, Dehghan A. The impact of Ramadan intermittent fasting on anthropometric measurements and body composition: Evidence from LORANS study and a meta-analysis. Front Nutr 2023; 10:1082217. [PMID: 36733380 PMCID: PMC9886683 DOI: 10.3389/fnut.2023.1082217] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/02/2023] [Indexed: 01/18/2023] Open
Abstract
Background Although the effect of Ramadan intermittent fasting (RIF) on anthropometry and body composition has been questioned, none of the previous studies tried to explain the reported changes in these parameters. Also, systematic reviews that investigated the topic were limited to healthy individuals or a specific disease group. Methods The London Ramadan Study (LORANS) is an observational study on health effects of RIF. We measured weight, waist circumference (WC), hip circumference (HC), body mass index (BMI), waist-to-hip ratio (WHR), basal metabolic rate (BMR), fat percentage (FP), free-fat mass (FFM), extremities predicted muscle mass, total body water (TBW), trunk FM, trunk FFM and trunk predicted muscle mass before and immediately after Ramadan. Using mixed-effects regression models, we investigated the effect of RIF with adjustment for potential confounders. We also conducted a meta-analysis of the results of LORANS with other studies that investigated the effect of RIF on anthropometry and body composition. The review protocol is registered with PROSPERO registry (CRD42020186532). Results We recruited 146 participants (Mean ± SD age = 43.3 ± 15 years). Immediately after Ramadan, compared with before Ramadan, the mean difference was-1.6 kg (P<0.01) in weight,-1.95cm (P<0.01) in WC,-2.86cm (P <0.01) in HC, -0.60 kg/m2 (P < 0.01) in BMI and -1.24 kg (P < 0.01) in FM. In the systematic review and meta-analysis, after screening 2,150 titles and abstracts, 66 studies comprising 7,611 participants were included. In the general population, RIF was followed by a reduction of 1.12 Kg in body weight (-1.89- -0.36, I2 = 0), 0.74 kg/m2 reduction in BMI (-0.96- -0.53, I2 = 0), 1.54cm reduction in WC (-2.37- -0.71, I2 = 0) and 1.76cm reduction in HC (-2.69- -0.83, I2 = 0). The effect of fasting on anthropometric and body composition parameters starts to manifest in the second week of Ramadan and starts to diminish 3 weeks after Ramadan. Conclusion RIF is associated with a reduction in body weight, BMI, WC, HC, FM, FP and TBW. Most of these reductions are partially attributed to reduced FM and TBW. The reductions in these parameters appear to reverse after Ramadan.
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Affiliation(s)
- Rami Al-Jafar
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- Department of Data Services, Lean Business Services, Riyadh, Saudi Arabia
| | - Nisa Sri Wahyuni
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | - Karim Belhaj
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
| | - Mohammad Hamed Ersi
- Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Zahra Boroghani
- Faculty of Medicine, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
- Clinical Research Development of Shahid Mohammadi Hospital, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Amer Alreshidi
- Pharmaceutical Care Department, Hail General Hospital, Hail Health Cluster, Ministry of Health, Hail, Saudi Arabia
| | - Zahra Alkhalaf
- Dammam Medical Complex, Medical and Clinical Affairs, Dammam, Saudi Arabia
| | - Paul Elliott
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- Dementia Research Institute at Imperial College London, London, United Kingdom
- National Institute for Health Research Imperial College Biomedical Research Centre, Imperial College London, London, United Kingdom
| | - Konstantinos K. Tsilidis
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece
| | - Abbas Dehghan
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
- Dementia Research Institute at Imperial College London, London, United Kingdom
- MRC-PHE Centre for Environment and Health, School of Public Health, Imperial College London, London, United Kingdom
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Hassan-Beck R, Hafidh K, Badi A, Doukman K, Karmo M, Mir R, Beshyah SA. Ramadan Fasting in Health and Disease in 2021: A Narrative Review. IBNOSINA JOURNAL OF MEDICINE AND BIOMEDICAL SCIENCES 2022. [DOI: 10.1055/s-0042-1757473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Introduction: The literature on the health aspects of Ramadan fasting (RF) is widely spread in many journals.
Materials and Methods: This is a narrative review of data obtained from the PubMed database (National Library of Medicine, Bethesda, Maryland, United States). We used the search term “Ramadan fasting,” and relevant records were examined. The publications are narrated thematically.
Results: The publications spanned fundamental, clinical, professional, cultural, and advocacy facets. The publications crossed conventional disciplinary lines and geographical locations and appeared in journals with different access systems. The contents are presented under the themes that emerged depending on the retrieved literature. This year basic coverage included changes in physiology and nutrition during Ramadan. However, the clinical issues included a wide range of topics. These included the impact of RF on nonalcoholic fatty liver disease and adjustments needed in endocrine replacement therapy for hypothyroidism and adrenal insufficiency. Coverage also included chronic kidney disease. The impact on maternal health, fetal well-being, and long-term effects of RF exposures were addressed in several studies. Studies in cardiovascular medicine focused on blood pressure and cardiovascular risk factors. Sports medicine and athletes' well-being received somewhat prominent coverage. The impact on renal function, particularly in patients with chronic kidney disease, was investigated by a few authors. Several groups addressed the eyes' structure and function, neurological conditions, especially headache disorders, and hematological and oncological conditions. Finally, the impact of RF on several aspects of mental health and well-being was addressed by various groups.
Conclusions: Health aspects of RF received a sustained academic interest with a broad spectrum in 2021. This narration provides an overview of the year's scholarly health-related literature on various aspects of health and disease. It should help researchers and clinicians catch up quickly with the health concerns during Ramadan.
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Affiliation(s)
- Reem Hassan-Beck
- Clinical Trial Unit, Sheikh Shakhbout Medical City, Abu Dhabi, United Arab Emirates
| | - Khadija Hafidh
- Department of Diabetes and Endocrinology, Rashid Hospital, Dubai, United Arab Emirates
- Department of Medicine, Dubai Medical College for Girls, Dubai, United Arab Emirates
| | - Amal Badi
- Department of Obstetrics and Gynecology, Koster Clinic, Dubai, United Arab Emirates
| | - Khaled Doukman
- Department of Medicine, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
- Abu Dhabi Sports Council, Abu Dhabi, United Arab Emirates
| | - Mazn Karmo
- Department of Medicine, Yas Clinic Khalifa City, Abu Dhabi, United Arab Emirates
| | - Ruqqia Mir
- Department of Medicine, Yas Clinic Khalifa City, Abu Dhabi, United Arab Emirates
- Department of Neurology, Abu Dhabi Stemm Cell Center, Abu Dhabi, United Arab Emirates
| | - Salem A. Beshyah
- Department of Medicine, Dubai Medical College for Girls, Dubai, United Arab Emirates
- Department of Medicine, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates
- Department of Medicine, Yas Clinic Khalifa City, Abu Dhabi, United Arab Emirates
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