Development of high-fiber wheat bread using pre-saturated corn bran.

Area of Science:

• Food Science
• Bakery Science
• Ingredient Functionality

Background:

• Fiber ingredients can negatively impact bread quality.
• Pre-hydration is a potential method to mitigate these effects.

Purpose of the Study:

• To investigate the mechanism of pre-hydration on corn bran.
• To determine the optimal pre-hydration level for enriched bread quality.

Main Methods:

• Corn bran was pre-hydrated to various water activity (a_w) levels (0.9875–0.9990).
• Pre-hydrated corn bran replaced 20% of white flour in a standard white bread formula.
• Microstructural and textural properties of the bread were analyzed.

Main Results:

• Pre-saturated corn bran (a_w = 0.9976) yielded the best bread quality.
• Enriched bread with saturated bran exhibited optimal specific loaf volume, hardness, springiness, and cohesiveness.
• Suboptimal pre-hydration levels negatively affected bread characteristics.

Conclusions:

• Optimal pre-hydration (saturation) renders corn bran non-absorbent.
• Non-absorbent bran does not interfere with gluten network development.
• This method preserves high-quality bread characteristics in fiber-enriched products.