Dairy and Chocolate Consumption Associated With Lower Risk of Death: Study

A recent meta-analysis published in Frontiers in Nutrition explored whether consuming fermented foods is linked to lower risks of death from all causes, cardiovascular disease, and cancer in healthy adults. Fermented foods such as yogurt, cheese, and chocolate are widely consumed and contain beneficial compounds, including probiotics, bioactive peptides, and microbial metabolites that support gut and immune health.

Researchers analyzed data from 50 prospective cohort studies involving more than three million participants. Using established frameworks like PRISMA and MOOSE, they compared high versus low intake of fermented foods and assessed mortality outcomes. The findings revealed that not all fermented foods have equal health effects.

Fermented dairy products showed the most consistent benefits. Higher consumption was associated with about a 6% reduction in all-cause mortality. It was also linked to lower cardiovascular and cancer-related deaths, likely due to anti-inflammatory effects, improved metabolic health, and positive modulation of gut microbiota. Yogurt intake specifically was associated with reduced overall mortality, although its effects on cardiovascular and cancer mortality were not statistically significant.

Cheese consumption demonstrated a modest reduction in all-cause mortality but showed no clear association with cardiovascular or overall cancer deaths. Chocolate intake, particularly due to cocoa polyphenols, was linked to reduced all-cause and cardiovascular mortality, possibly through improved vascular function and reduced oxidative stress.

In contrast, foods like miso and fermented bread did not show consistent associations with mortality outcomes. The researchers noted variability across studies due to differences in populations, dietary habits, and study designs.

Overall, the findings suggest that certain fermented foods—especially fermented dairy and chocolate—may contribute to longevity. However, as the evidence is observational, further research is needed to confirm causal relationships and understand underlying mechanisms.

REFERENCE: Matalas A, Panagiotakos D, Fardet A, Savary-Auzeloux I, Chassard C, Praćer S, Vergères G & Paveljšek D. (2026). Fermented foods consumption, all-cause, and cause-specific mortality: a meta-analysis of prospective cohort studies. Frontiers in Nutrition. DOI: 10.3389/fnut.2026.1714437, https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2026.1714437/full