A urine sample showing white foam on shaking implies increased concentration of which component?

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Multiple Choice

A urine sample showing white foam on shaking implies increased concentration of which component?

Explanation:
Foamy urine when shaken reflects protein in the urine. Proteins, especially albumin, act as surface-active agents and lower the surface tension at the air–urine interface, stabilizing air bubbles and creating persistent white foam. The more protein present, the more noticeable the foam. This is not due to hemoglobin, bilirubin, or nitrite, which would cause different indicators or color changes rather than a frothy, foamy appearance.

Foamy urine when shaken reflects protein in the urine. Proteins, especially albumin, act as surface-active agents and lower the surface tension at the air–urine interface, stabilizing air bubbles and creating persistent white foam. The more protein present, the more noticeable the foam. This is not due to hemoglobin, bilirubin, or nitrite, which would cause different indicators or color changes rather than a frothy, foamy appearance.

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