Bioactive Food Peptides

also known as: Food-Derived Peptides, Dietary Bioactive Peptides, Casein Peptides, Whey Peptides

The hidden pharmacology of food — bioactive peptide fragments released during digestion of milk, meat, fish, and plant proteins, including casomorphins, lactokinins, and ACE-inhibitory peptides.

Peptide fragments (typically 2–20 amino acids) encrypted within food protein sequences and liberated by digestive enzymes or fermentation, some with documented blood-pressure-lowering, opioid, or immune-modulating effects at physiological concentrations.

Mechanism of action

Mechanism varies by peptide class: (1) ACE-inhibitory peptides (VPP, IPP from casein) lower blood pressure by inhibiting angiotensin-converting enzyme; (2) Casomorphins (β-casomorphin-7) are μ-opioid receptor agonists; (3) Immunopeptides (lactoferricin) have antimicrobial and immunomodulatory effects; (4) Antioxidant peptides scavenge free radicals via His, Trp, Tyr, Cys, and Met residues.

Primary uses

Functional food research
Antihypertensive nutraceuticals
Sports nutrition (whey peptides)
Gut health and immune modulation

Typical dosing

(oral (dietary))

Varies widely. ACE-inhibitory milk peptides: ~3–5 mg VPP+IPP/day. Whey protein hydrolysate: 20–40 g/day. Context-dependent.

Regulatory status

Individual products (e.g., Lactobacillus-fermented milk with VPP/IPP) approved as FOSHU (Foods for Specified Health Uses) in Japan. Not FDA-approved as drugs. Some marketed as dietary supplements.

References

[review] Korhonen H, Pihlanto A. "Bioactive peptides: production and functionality." Int Dairy J, 2006;16:945-960.
[review] Cicero AFG, et al. "Blood pressure lowering effect of lactotripeptides assumed as functional foods: a meta-analysis of current available clinical trials." J Hum Hypertens, 2011;25:425-436.

Related peptides

Collagen Peptides

The world's most-consumed peptide supplement — hydrolyzed collagen fragments with documented effects on skin elasticity, joint comfort, and bone density in clinical trials.

Carnosine

A naturally occurring muscle dipeptide — one of the body's primary intracellular buffers and anti-glycation agents, studied for longevity, neuroprotection, and athletic performance.

Lactoferricin

An antimicrobial peptide from mother's milk — a potent cationic fragment of lactoferrin with broad-spectrum activity against bacteria, fungi, viruses, and parasites, plus emerging anticancer properties.

Disclaimer

This entry is for educational purposes only and does not constitute medical advice. Dosing information reflects published regulatory or research data and is not a recommendation. Many compounds described here are not approved for human use in the United States. Consult a licensed medical professional before considering any peptide therapy.