Adding Probiotics and Casein to Yogurt Boosts Its Blood Pressure-Lowering Peptide Content

Combining Lb. plantarum M11 with sodium caseinate fortification significantly enhanced ACE-inhibitory peptide production in yogurt, with two identified peptides confirmed by molecular docking to bind ACE's active site.

Yogurt was prepared with standard cultures plus Lb. plantarum M11 and sodium caseinate. ACE-inhibitory activity was measured, peptides identified by nano-LC-MS/MS, and potential ACE-inhibitory peptides predicted using in silico analysis and molecular docking to ACE crystal structure.

High blood pressure affects nearly half of adults globally. If everyday foods like yogurt can be optimized to deliver clinically meaningful amounts of ACE-blocking peptides, millions of people could supplement their blood pressure management through diet — potentially reducing medication needs.

This study advances the concept of 'functional foods' — everyday foods engineered to deliver specific health benefits. By combining ACEIP-producing probiotic strains with casein fortification, researchers demonstrate a practical, scalable approach to creating antihypertensive dairy products. This strategy could be applied to other fermented foods and other health-promoting peptide targets.

In vitro ACE inhibition and computational modeling only — no human blood pressure measurements. Whether sufficient ACE-blocking peptides survive digestion and reach the bloodstream is unknown. The yogurt was not tested in clinical trials. Binding energies from docking are predictions, not measurements.