ABSTRACT

PURPOSE: Coronary artery calcification (CAC) progression is a strong predictor of cardiovascular disease (CVD) morbidity and mortality. However, the association between whole milk and CAC progression remains unknown. Recent studies highlighted beneficial effects of short chain fatty acids (SCFA) from whole milk on CVD. In this study, we attempted to investigate the relationship between whole milk consumption and CAC progression, and the potential effect of SCFA in it.

METHODS: We analyzed a population-based cohort with 5273 participants from the Multi-Ethnic Study of Atherosclerosis (MESA) who completed a dietary questionnaire at baseline. CAC was measured at baseline and subsequent follow-up examinations by multi-detector computed tomography (MDCT) scans with Agatston scores. CAC progression was defined as increased CAC scores in the follow-up from the baseline exam.

RESULTS: Participants consuming whole milk exhibited lower baseline CAC and CAC progression than those who never/rarely consumed whole milk (P < 0.001 and P = 0.010, respectively). Moreover, multivariable logistic regression analysis demonstrated that whole milk intake was independently associated with lower CAC progression (OR 0.765; 95% CI 0.600-0.977; P = 0.032), especially in males, participants with age ≤ 64 years and with body mass index (BMI) ≤ 25 kg/m2. Mediation analysis further showed that caproic acid, one kind of SCFA, partly mediated protective effects of whole milk on CAC progression.

CONCLUSIONS: Self-reported whole milk consumption was inversely associated with CAC progression in community-dwelling participants, especially in those at relatively low cardiovascular risks. The beneficial effect was partially mediated by SCFA. Therefore, whole milk can be incorporated into part of a cardio-protective diet. Regarding this, future studies may target SCFA to provide insight into more mechanistic views.

PMID:32583016 | DOI:10.1007/s00394-020-02301-5

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