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Updated: Jul 14, 2026
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In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids
Published on: November 18, 2022
Structural Differences Modulate In Vitro and In Vivo Digestion and Absorption of Milk Phospholipids: Insights from
Shilu Deng1, Jing Li1,2, Li Chen3
1State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang, Jiangxi 330047, China.
Journal of Agricultural and Food Chemistry
|July 13, 2026
Summary
Phospholipid composition significantly impacts infant digestion and fatty acid absorption. Human milk phospholipid analogs demonstrated enhanced digestion and absorption compared to infant formula analogs in simulated infant digestion and mouse models.
Area of Science:
- Lipid biochemistry
- Nutritional science
- Gastrointestinal physiology
Background:
- Human milk and infant formula have distinct phospholipid profiles.
- Phospholipids are crucial for fat digestion and nutrient absorption in infants.
Purpose of the Study:
- To investigate how phospholipid class composition affects digestion and fatty acid bioavailability.
- To compare the digestion and absorption of simplified human milk (HMPA) and infant formula (IFPA) phospholipid analogs.
Main Methods:
- Utilized simplified model emulsions with purified phosphatidylethanolamine (PE), phosphatidylcholine (PC), and sphingomyelin (SM).
- Simulated infant gastrointestinal digestion to assess phospholipid hydrolysis and fatty acid release.
- Administered emulsions to mice to evaluate fatty acid bioavailability via serum AUCs.
Main Results:
- Phospholipid hydrolysis and fatty acid release followed the order PE > PC > SM.
- HMPA exhibited greater interfacial charge changes, faster degradation, and higher fatty acid release than IFPA.
- HMPA resulted in higher dose-normalized serum fatty acid AUCs in mice.
Conclusions:
- Phospholipid class composition modulates digestion and fatty acid absorption rates.
- These findings provide mechanistic insights into lipid digestion but do not represent direct infant nutritional outcomes due to model simplification.
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