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Efeito da Temperatura na Digestão de Amido: De 25°C a 35°C Acelera a Hidrólise

Raising temperature from 25°C to 35°C significantly enhances starch digestion kinetics:

1. Enzyme Kinetics (Q₁₀ Effect)

α-Amylase (salivary, pancreatic) Q₁₀ ≈ 1.5–2.0. 10°C rise → 1.5–2× rate increase. Optimum ~37°C; 35°C approaches peak.

2. Starch Gelatinization

Granule swelling/rupture accelerates with temperature. At 35°C, granules hydrate faster → more accessible to amylase. Full gelatinization typically >60°C, but pre-gelatinization softening occurs at 35°C.

3. Substrate Diffusion

Increased molecular motion → faster enzyme-substrate collision frequency (Arrhenius).

4. Microbial Contribution

Colonic microbiota (if considering in vitro fermentation models) show enhanced amylolytic activity at 35°C vs 25°C.

5. Nutrient Absorption

Intestinal glucose transporters (SGLT1, GLUT2) function optimally at body temperature; 35°C improves uptake vs. 25°C.

Caveat

>40°C denatures amylase; fever >39°C may transiently impair digestion.

Physiologic temperature (37°C) is evolutionary optimum for human digestive enzymes.