Polysaccharides as Alternative Moisture Retention Agents for Shrimp

Area of Science:

• Food Science
• Seafood Technology
• Hydrocolloids

Background:

• Phosphates are commonly used as moisture retention agents (MRAs) in the shrimp industry.
• However, phosphates are costly, require labeling, and can increase consumer prices.
• There is a need for cost-effective and natural alternatives to phosphates.

Purpose of the Study:

• To evaluate polysaccharides as potential alternative MRAs for shrimp.
• To compare the functional impacts of various polysaccharides with conventional phosphates.
• To assess the effects of these treatments on moisture retention, water activity, and consumer acceptability.

Main Methods:

• Shrimp were treated with solutions of fibercolloid, pectin, xanthan gum (XG), carboxymethyl cellulose, and sodium tripolyphosphate (STP).
• Moisture retention was tested through freezing, boiling, and oven drying.
• Water activity and solution uptake were measured; consumer sensory acceptability was also assessed.

Main Results:

• Fibercolloid and STP showed the best performance in reducing moisture loss during freezing.
• STP exhibited the lowest moisture loss during boiling.
• Fibercolloid and XG demonstrated superior moisture uptake compared to phosphates.
• No significant impact on water activity was observed across treatments.
• Most treatments received similar consumer acceptability ratings, except for pectin.

Conclusions:

• Polysaccharides, including fibercolloid and xanthan gum, are viable and effective alternatives to phosphates as MRAs in shrimp.
• These natural alternatives offer comparable or superior functional properties.
• Further research into polysaccharide applications can lead to cost savings and improved product labeling.