Percentage of Bound Water in Meat

Bound water forms what percentage of total water content in meat?

Correct Answer: 4–5%

Bound water forms only 4–5% of total water content in meat. Despite being a small fraction, it plays a crucial role in meat quality.

Types of Water in Meat

• Bound water (4–5%): Tightly held by protein molecules (primarily myofibrillar proteins); cannot be removed by normal pressure or freezing; does not participate in microbial growth or chemical reactions.
• Immobilized water (~85%): Held within the myofibrillar lattice but not tightly bound; can be lost as drip or cooking loss.
• Free water (~10%): Loosely held; easily expressed; forms drip loss.

Clinical Importance

• PSE meat (Pale, Soft, Exudative): Low water binding capacity → more drip loss due to rapid pH fall denaturation of proteins → less bound and immobilized water.
• DFD meat (Dark, Firm, Dry): High water binding capacity → meat appears darker; pH stays above 6.0 → proteins retain more bound water.