05 December 2018 In General Health

The beneficial association of the Mediterranean diet (MedDiet) with longevity has been consistently demonstrated, but the associations of MedDiet components have not been accordingly evaluated. We performed an updated meta-analysis of prospective cohort studies published up to 31 December 2017, to quantify the association of adherence to MedDiet, expressed as an index/score (MDS) and of its components with all-cause mortality. We estimated summary relative risks (SRR) and 95 % CI using random effects models. On the basis of thirty studies (225 600 deaths), SRR for the study-specific highest/lowest and per 1sd MDS increment were 0.79 (95 % CI 0.77, 0.81, Iota 2=42 %, P-heterogeneity 0.02) and 0.92 (95 % CI 0.90, 0.94, Iota 2 56 %, P-heterogeneity <0.01), respectively. Inversely, statistically significant associations were evident in stratified analyses by country, MDS range and publication year, with some evidence for heterogeneity across countries overall (P-heterogeneity 0.011), as well as across European countries (P=0.018). Regarding MDS components, relatively stronger and statistically significant inverse associations were highlighted for moderate/none-excessive alcohol consumption (0.86, 95 % CI 0.77, 0.97) and for above/below-the-median consumptions of fruit (0.88, 95 % CI 0.83, 0.94) and vegetables (0.94, 95 % CI 0.89, 0.98), whereas a positive association was apparent for above/below-the-median intake of meat (1.07, 95 % CI 1.01, 1.13). Our meta-analyses confirm the inverse association of MedDiet with mortality and highlight the dietary components that influence mostly this association. Our results are important for better understanding the role of MedDiet in health and proposing dietary changes to effectively increase adherence to this healthy dietary pattern.

29 October 2018 In Phenolic compounds

There is a growing body of evidence implicating the gut 'microbiome' role in overall human health. Bacterial species belonging to the genera Lactobacillus and Bifidobacterium are generally considered to be beneficial and are commonly used in probiotic applications, whereas increases in some genera including Clostridum, Eubacterium and Bacteroides are implicated in negative health outcomes. Dietary polyphenols are bioactive compounds that have been found to increase the numbers of beneficial bacteria and antimicrobial actions against pathogenic bacteria, however most studies have been conducted in animal models or in-vitro colonic models. The aim of this systematic review was to provide an overview of recent trials on the effect of dietary grape and red wine polyphenols on the gut microbiota in humans. Following PRISMA guidelines, a systematic review was conducted of electronic databases (PubMed, CINAHL, Cochrane Library, Wed of Science and Scopus) to identify human intervention trials examining the effect of grape or wine polyphenols on gut microbiota. Seven trials met the inclusion criteria. One study looked at changes in gut microbiota following the ingestion of de-alcoholised red wine or red wine, and six studies referred to gut microbiota as intermediates in formation of phenolic metabolites. All studies confirmed that ingested polyphenols from grape and red wine, were modulated by gut microbiota, increasing numbers of polyphenolic metabolites which were found in blood, urine, ileal fluid and faeces. Intake of polyphenols derived from grape and red wine can modulate gut microbiota and contribute to beneficial microbial ecology that can enhance human health benefits. Additionally, grape and red wine polyphenols were modulated by the gut microbiota and there is a potential for a two-way relationship between the gut microbiota and polyphenolic compounds. Nevertheless, additional research is required to fully understand the complex relationship between gut microbiota and dietary polyphenols before any health claims can be made in relation to human health.

27 September 2018 In Cardiovascular System

BACKGROUND/OBJECTIVES: Low/moderate alcohol consumption seems to be protective against cardiovascular disease (CVD). This study aimed to investigate the association of wine/beer consumption with the 10-year CVD incidence.

SUBJECTS/METHODS: During 2001-2002, 3042 CVD-free adults consented to participate in the ATTICA study; of them 2583 completed the 10-year follow-up (85% participation rate), but precise information about fatal/nonfatal CVD incidence (myocardial infarction, angina pectoris, cardiac ischemia, heart failure, chronic arrhythmias, and stroke) was available in 2020 participants (overall retention rate 66%). Alcohol/ethanol intake and the alcoholic beverages consumed were assessed; participants were categorized into three groups (no use; 1 glass/week).

RESULTS: Alcohol drinking was reported by 56% of the participants who did not develop a CVD event and 49% of those who had (p = 0.04); whereas ethanol intake was 14 +/- 16 g among those who did not had an event vs. 21 +/- 18 g among those who had a CVD event (p < 0.001). A strong inverse and similar association between low wine/beer intake (20 g/day had CVD-risk HRs (95% CI) of 0.60 (0.40-0.98), 1.22 (0.60-1.14), and 1.81 (0.70-4.61), respectively.

CONCLUSIONS: This study revealed similar results of low wine/beer consumption against CVD incidence, mainly due to its implication on low-grade chronic inflammation.

27 July 2018 In Cardiovascular System

OBJECTIVE: To investigate the association between alcohol consumption (at baseline and over lifetime) and non-fatal and fatal coronary heart disease (CHD) and stroke.

DESIGN: Multicentre case-cohort study.

SETTING: A study of cardiovascular disease (CVD) determinants within the European Prospective Investigation into Cancer and nutrition cohort (EPIC-CVD) from eight European countries.

PARTICIPANTS: 32 549 participants without baseline CVD, comprised of incident CVD cases and a subcohort for comparison.

MAIN OUTCOME MEASURES: Non-fatal and fatal CHD and stroke (including ischaemic and haemorrhagic stroke).

RESULTS: There were 9307 non-fatal CHD events, 1699 fatal CHD, 5855 non-fatal stroke, and 733 fatal stroke. Baseline alcohol intake was inversely associated with non-fatal CHD, with a hazard ratio of 0.94 (95% confidence interval 0.92 to 0.96) per 12 g/day higher intake. There was a J shaped association between baseline alcohol intake and risk of fatal CHD. The hazard ratios were 0.83 (0.70 to 0.98), 0.65 (0.53 to 0.81), and 0.82 (0.65 to 1.03) for categories 5.0-14.9 g/day, 15.0-29.9 g/day, and 30.0-59.9 g/day of total alcohol intake, respectively, compared with 0.1-4.9 g/day. In contrast, hazard ratios for non-fatal and fatal stroke risk were 1.04 (1.02 to 1.07), and 1.05 (0.98 to 1.13) per 12 g/day increase in baseline alcohol intake, respectively, including broadly similar findings for ischaemic and haemorrhagic stroke. Associations with cardiovascular outcomes were broadly similar with average lifetime alcohol consumption as for baseline alcohol intake, and across the eight countries studied. There was no strong evidence for interactions of alcohol consumption with smoking status on the risk of CVD events.

CONCLUSIONS: Alcohol intake was inversely associated with non-fatal CHD risk but positively associated with the risk of different stroke subtypes. This highlights the opposing associations of alcohol intake with different CVD types and strengthens the evidence for policies to reduce alcohol consumption.

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