Fortifying yogurt with Lactiplantibacillus plantarum M11 and sodium caseinate significantly increased ACE-inhibitory peptide production, with molecular docking confirming two key peptides bind directly to ACE's active site — supporting antihypertensive functional food potential.
Binding energies: -10.1 and -10.7 kcal/moltwo identified yogurt peptides dock into ACE's active site with strong affinity, confirmed by molecular modeling
What the researchers found
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.
Why it matters
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.
The numbers in context
ACE-inhibitory activity significantly enhanced (p < 0.05); molecular docking binding energies of -10.7 kcal/mol or better confirmed for identified peptides.
How the study worked
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.
Who was studied
In vitro and in silico analysis of fortified yogurt
What this study cannot tell us
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.
How to read the evidence
Preliminary — in vitro enzyme inhibition with computational confirmation. No animal or human blood pressure studies conducted. The functional food concept is promising but unvalidated clinically.
When this study was published
Published in 2024, reflecting current interest in bioactive peptides from fermented dairy products.
The bigger picture
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.
Questions still open
- How much of this fortified yogurt would a person need to consume daily to achieve a measurable blood pressure reduction?
- Do the ACE-inhibitory peptides survive passage through the stomach's acidic environment and reach the bloodstream intact?
- Could this probiotic-casein fortification strategy be applied to other fermented foods like kefir or cheese?
Common questions
Can eating yogurt really lower blood pressure?
How do probiotics create blood pressure-lowering peptides?
Read the original research
Impact of Lactiplantibacillus plantarum and casein fortification on angiotensin converting enzyme inhibitory peptides in yogurt: identification and in silico analysis.
Food & function, 15(7), 3824-3837
Citation
Wang, Jiaxu; Wang, Zhimin; Zhang, Mixia; Li, Jiaxin; Zhao, Cuisong; Ma, Chunli; Ma, Dexing. (2024). Impact of Lactiplantibacillus plantarum and casein fortification on angiotensin converting enzyme inhibitory peptides in yogurt: identification and in silico analysis.. Food & function, 15(7), 3824-3837. https://doi.org/10.1039/d3fo04534j