The Study
Beyond A1 milk concerns: dietary-relevant concentrations of β-casomorphin-7 show limited absorption but retain opioid-like activity in an intestinal cell model.
This study tested a milk protein in a dish of lab cells, not in people. It found that the protein can act a little like a painkiller in those cells, but that doesn't mean it does the same thing in your body when you drink milk.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
A lab study tested a piece of milk protein called BCM-7 to see if it affects the gut in a way that might make you eat more.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 54 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The effect is limited to gut cells in a dish — it doesn't prove BCM-7 makes people eat more or feel hungrier in real life.
- 2At normal milk protein levels, BCM-7 activated opioid receptors in gut cells but didn't damage cells, trigger inflammation, or pass through the gut wall.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Food & function
Year
2026
Authors
Giorgia Antonelli, G. Piccinini, Mattia Santoni, T. Bertuzzi, D. Risso, Federico Canzoneri, R. Menta, N. Tosi, L. Milani, C. Del Bo’, Alessandra Bordoni, Margherita Dall’Asta, Francesca Danesi
Related Content
Claims (4)
Casomorphins from dairy proteins bind to opioid receptors in the body and lead to reduced feelings of fullness and increased food intake.
At a concentration of 120 µM, β-casomorphin-7 raises levels of IL-8 mRNA in intestinal cells but does not raise levels of IL-8 protein.
In human intestinal cells grown in the lab, β-casomorphin-7 at concentrations found in the human body increases the presence of µ-opioid receptors without changing cell survival, mucus output, or inflammatory signals.
When β-casomorphin-7 is present at concentrations found in the human gut, it does not pass significantly through the intestinal lining and is mostly broken down by the enzyme dipeptidyl peptidase-4, leading to little entry into the bloodstream.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.