Age-related digestive capacity decline modulates the kinetic patterns of starch and protein digestion from varied diets: An in vitro study.

SEA-Diet exhibited the highest total amino acid content but a lower amino acid score compared to other diets.

• SEA-Diet total amino acid content was 1274.22 mg/g protein
• Despite highest total amino acid content, SEA-Diet exhibited a lower amino acid score (AAS)
• Four diets compared: Mediterranean diet (M-Diet), Southern European Atlantic diet (SEA-Diet), Japanese diet (J-Diet), and Chinese diet (C-Diet)
• An in vitro static digestion model was employed for both adults and older adults

J-Diet and C-Diet had substantially higher initial starch digestion rates than M-Diet and SEA-Diet.

• J-Diet initial starch digestion rate: 3.73 × 10⁻² min⁻¹
• C-Diet initial starch digestion rate: 2.45 × 10⁻² min⁻¹
• M-Diet initial starch digestion rate: 1.97 × 10⁻² min⁻¹
• SEA-Diet initial starch digestion rate: 1.88 × 10⁻² min⁻¹
• J-Diet had the highest initial starch digestion rate among all four diets

SEA-Diet exhibited the highest degree of protein hydrolysis among the four dietary patterns tested.

• SEA-Diet degree of protein hydrolysis (DH) reached 26.58%
• Degree of hydrolysis was measured using an in vitro static digestion model
• Both adult and older adult digestive conditions were evaluated
• Dietary composition was identified as a key regulator of protein digestive characteristics

The C-Diet was identified as particularly suitable for older adults based on favorable peptide release patterns, despite concerns about rapid starch digestion.

• C-Diet showed favorable peptide release behavior for older adults
• Rapid starch digestion of C-Diet was noted as a potential concern
• Complementary fiber-rich foods were suggested to offset rapid starch digestion in C-Diet
• Age-related digestive capacity decline was modeled to assess suitability of diets for older populations

An in vitro static digestion model simulating both adult and older adult digestive capacity was used to evaluate digestion kinetics of starch and protein across four dietary patterns.

• Four diets evaluated: Mediterranean diet (M-Diet), Southern European Atlantic diet (SEA-Diet), Japanese diet (J-Diet), and Chinese diet (C-Diet)
• Study assessed nutritional composition, digestion kinetics of starch and protein, and peptide release behavior
• Separate digestion conditions were applied to model adults and older adults
• Age-related digestive capacity decline was incorporated into the model design

Compositional variations among the four diets regulated both protein and starch digestive characteristics across adult and older adult populations.

• Study established a scientific foundation for dietary recommendations for the older population
• Both starch digestion kinetics and protein hydrolysis were modulated by dietary composition
• The findings applied to both adults and older adults under simulated in vitro conditions
• Peptide release behavior was also shown to differ among dietary patterns