Protein contributes to which aspect of beer head formation?

Protein contributes to which aspect of beer head formation?

• A. Creamy/fluffy head
• B. Increases fizz
• C. Reduced head
• D. No effect

Answer: (A)

Proteins act as surface-active agents that migrate to the bubble surfaces in beer. When beer is carbonated and poured, these proteins form a viscoelastic film at the air–water interface of each bubble, stabilizing the bubbles and preventing them from bursting too quickly. That stabilization is what gives the beer a creamy, fluffy head that lasts, rather than a quick dissolution of foam. The fizz itself comes from dissolved CO2, not the proteins, so proteins don’t increase carbonation. They mainly influence the texture and persistence of the foam, not the amount of fizz. So the best match is that protein contributes to a creamy/fluffy head.

Proteins act as surface-active agents that migrate to the bubble surfaces in beer. When beer is carbonated and poured, these proteins form a viscoelastic film at the air–water interface of each bubble, stabilizing the bubbles and preventing them from bursting too quickly. That stabilization is what gives the beer a creamy, fluffy head that lasts, rather than a quick dissolution of foam. The fizz itself comes from dissolved CO2, not the proteins, so proteins don’t increase carbonation. They mainly influence the texture and persistence of the foam, not the amount of fizz. So the best match is that protein contributes to a creamy/fluffy head.