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Herbs and spices have long been used for their medicinal properties, and are well known for their anti-inflammatory and antioxidant effects. New research suggests that incorporating herbs and spices such as cinnamon, cumin, ginger, and turmeric into a typical American diet can meaningfully alter gut microbiome diversity in adults with increased cardiovascular disease risk.
The spice blend used in the study included cinnamon, ginger, cumin, and turmeric. All 48 participants were living with obesity and had at least one additional cardiovascular risk factor, such as high blood glucose. They consumed daily amounts of 0.5 grams, 3.3 grams, or 6.6 grams. By the end of the four-week period, those taking the 3.3 g and 6.6 g doses experienced notable improvements in gut bacterial diversity.
Researchers observed a targeted rise in Ruminococcaceae following the dietary spice intervention. This bacterial group is known for generating short-chain fatty acids that play a key role in lowering inflammation, strengthening gut integrity, and aiding liver function. The study aimed to examine how the composition of this bacterial family shifted when spices were incorporated into regular meals and snacks.
Overall, the study groups showed enrichment of Ruminococcaceae, with changes increasing alongside spice dosage. Participants who consumed the most spices experienced the most pronounced differences compared with their baseline after the four-week period. These findings suggest that consistent spice consumption may promote a gut environment less favorable to harmful or opportunistic bacteria.
Findings from this research indicate that adding a spice blend at doses of roughly ¼ to 1½ teaspoons per day may boost gut bacterial diversity and raise levels of beneficial Ruminococcaceae in as little as 4–6 weeks. That said, the study examined only the structure of the gut microbiome, essentially a snapshot of who is there. More work is needed to determine the functional roles of these microbes and how their activity may impact health outcomes.
To view the original scientific study click below:
Herbs and Spices Modulate Gut Bacterial Composition in Adults at Risk for CVD: Results of a Prespecified Exploratory Analysis from a Randomized, Crossover, Controlled-Feeding Study
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