Milk proteins release diverse bioactive peptides during digestion — including opioid, antihypertensive, and mineral-absorption enhancing peptides — making milk a natural source of functional compounds.
Multiple bioactivitiesMilk generates opioid, antihypertensive, and mineral-absorbing peptides during digestion — a natural pharmacy in every glass
What the researchers found
Milk-derived peptides from casein and whey digestion include opioid peptides (casomorphins), antihypertensive peptides (casokinins), mineral carriers (casein phosphopeptides), and other bioactives with diverse health effects.
Why it matters
Understanding milk's bioactive peptides explains health benefits beyond calories and calcium, supporting functional food development and targeted dairy product design.
How the study worked
Review of published research on bioactive peptides released from milk protein digestion, covering multiple peptide families and their demonstrated biological activities.
What this study cannot tell us
Brief review. The bioavailability and physiological significance of milk-derived peptides at normal consumption levels is debated.
How to read the evidence
Moderate evidence from a review synthesizing peptide characterization and bioactivity studies across multiple milk protein sources.
When this study was published
Published in 2000. Milk bioactive peptide research has expanded enormously, with functional dairy products now marketed based on these peptide activities.
The bigger picture
Food isn't just fuel — it generates bioactive peptides during digestion that influence pain, blood pressure, mineral absorption, and immune function. Milk is one of the richest sources of these functional peptides.
Questions still open
- Are milk-derived peptide benefits clinically significant at normal dairy intake?
- Could fermented dairy products maximize bioactive peptide release?
- Do infant formula and breast milk differ in bioactive peptide profiles?
Common questions
Does drinking milk generate drugs in your body?
Is this why milk is considered healthy?
Read the original research
Effects of milk-derived bioactives: an overview.
The British journal of nutrition, 84 Suppl 1, S3-10
Citation
Shah, N P. (2000). Effects of milk-derived bioactives: an overview.. The British journal of nutrition, 84 Suppl 1, S3-10.