How Does the U Pass Work

The UPass urine test works by replicating real human urine, including the temperature. By carefully analyzing the properties and chemical conditions of actual urine, scientists have been able to recreate a synthetic formula that is nearly indistinguishable from the real thing.

How much does a UPass cost?

TypeFare1-Way$1.7530-Day Pass$43LIFE 30-Day Pass (low-income)$30U-Pass (participating schools only)varies

Can you tell the difference between synthetic urine and real urine?

Shaking a sample can expose fake pee because real urine contains protein, which bubbles when agitated. Synthetic urine lacks protein, he said. Sniffing works because urine contains odor-producing bacteria that multiplies the longer a sample is outside the body. Synthetic doesn’t.