Composition and Nutrient Value Proposition of Brewers Spent Grain

Area of Science:

• Food Science
• Biochemistry
• Sustainable Agriculture

Background:

• Brewer's spent grain (BSG) is a significant byproduct of the brewing industry.
• BSG is abundant in dietary fiber, proteins, and valuable phenolic compounds.
• These phenolic compounds, primarily hydroxycinnamic acids, possess notable bioactivities.

Purpose of the Study:

• To review the composition and preservation of BSG.
• To explore extraction techniques for BSG proteins and phenolic acids.
• To highlight the bioactivities and applications of BSG components in food and animal feed.

Main Methods:

• Literature review of existing research on BSG.
• Analysis of extraction methods for BSG components.
• Evaluation of studies on BSG integration into food and feed.

Main Results:

• BSG is rich in fiber, protein, and phenolic acids (ferulic, p-coumaric, caffeic).
• These compounds exhibit antioxidant, anticarcinogenic, antiatherogenic, and anti-inflammatory properties.
• BSG incorporation into human food increases fiber and protein; into animal feed, it boosts milk yield and quality.

Conclusions:

• BSG is a valuable, underutilized resource with significant nutritional and bioactive potential.
• Extraction and integration of BSG components offer health benefits for humans and animals.
• Utilizing BSG contributes to sustainable practices in the food and agriculture industries.