Homayoun L Daneschvar1, Gerald W Smetana2, Luke Brindamour3, Paul A Bain4, Kenneth J Mukamal5. 1. Department of Medicine, Harvard Medical School, Boston, Mass; Division of General Medicine, Beth Israel Deaconess Medical Center, Boston, Mass. Electronic address: hdanesch@bidmc.harvard.edu. 2. Department of Medicine, Harvard Medical School, Boston, Mass; Division of General Medicine, Beth Israel Deaconess Medical Center, Boston, Mass. 3. Department of Medicine, Warren Alpert Medical School of Brown University, Providence, RI; Division of Internal Medicine, Newport Hospital, Newport, RI. 4. Harvard Library, Countway Library of Medicine, Harvard Medical School, Boston, Mass. 5. Department of Medicine, Harvard Medical School, Boston, Mass; Division of General Medicine, Beth Israel Deaconess Medical Center, Boston, Mass; Division of General Medicine, Harvard Medical School, Boston, Mass.
Abstract
BACKGROUND: Coffee is one of the most widely consumed beverages globally. A substantial number of observational data suggest an inverse relationship between coffee consumption and the risk for cardiovascular disease. The basis for this association is not clear. In this review, we specifically study the impact of coffee on inflammatory biomarkers as one potential mechanistic basis for this observation. Our objective was to systematically review randomized controlled trials that examined the effects of coffee consumption on selected cardiovascular biomarkers. METHODS: We systematically reviewed bibliographic databases including PubMed (NCBI), Embase (Elsevier), CINAHL (EBSCO), Web of Science (Clarivate Analytics), Cochrane Central Register of Controlled Trials (EBSCO), and CAB Abstracts (Clarivate Analytics). We searched for randomized controlled trials that studied the effect of drinking coffee on inflammatory markers of cardiovascular risk. RESULTS: The search of electronic databases returned 1631 records. After removing duplicate records and ineligible studies, we examined a total of 40 full-text documents, 17 of which were eligible for further analysis. In our review, boiled coffee, in particular, appeared to raise total and low-density lipoprotein cholesterol and apolipoprotein B, but evidence suggests no similar effect for filtered coffee. One study showed a significant increase in blood interleukin 6 levels among individuals who drank caffeinated coffee, compared with individuals consuming no coffee. CONCLUSION: Based on our systematic review of randomized controlled studies, we cannot confidently conclude that an anti-inflammatory effect of coffee is a major contributing factor to the lower all-cause mortality reported in observational studies.
BACKGROUND: Coffee is one of the most widely consumed beverages globally. A substantial number of observational data suggest an inverse relationship between coffee consumption and the risk for cardiovascular disease. The basis for this association is not clear. In this review, we specifically study the impact of coffee on inflammatory biomarkers as one potential mechanistic basis for this observation. Our objective was to systematically review randomized controlled trials that examined the effects of coffee consumption on selected cardiovascular biomarkers. METHODS: We systematically reviewed bibliographic databases including PubMed (NCBI), Embase (Elsevier), CINAHL (EBSCO), Web of Science (Clarivate Analytics), Cochrane Central Register of Controlled Trials (EBSCO), and CAB Abstracts (Clarivate Analytics). We searched for randomized controlled trials that studied the effect of drinking coffee on inflammatory markers of cardiovascular risk. RESULTS: The search of electronic databases returned 1631 records. After removing duplicate records and ineligible studies, we examined a total of 40 full-text documents, 17 of which were eligible for further analysis. In our review, boiled coffee, in particular, appeared to raise total and low-density lipoprotein cholesterol and apolipoprotein B, but evidence suggests no similar effect for filtered coffee. One study showed a significant increase in blood interleukin 6 levels among individuals who drank caffeinated coffee, compared with individuals consuming no coffee. CONCLUSION: Based on our systematic review of randomized controlled studies, we cannot confidently conclude that an anti-inflammatory effect of coffee is a major contributing factor to the lower all-cause mortality reported in observational studies.
Authors: Seda Kaya; Mahmut Bodur; Merve İlhan Esgin; Funda Pınar Çakıroğlu; Ayşe Özfer Özçelik Journal: Int J Ment Health Addict Date: 2021-11-01 Impact factor: 3.836