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the claim

Acrid urine smell is caused by specific metabolic waste products

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Acrid urine smell is caused by specific metabolic waste products?

Yes. Specific metabolic waste products and volatile compounds excreted in urine are responsible for its distinct and sometimes pungent odors.

Verdict: SUPPORTED · 4 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently show that urinary odors, such as those caused by asparagus, ramson, or metabolic conditions like trimethylaminuria, are directly linked to the excretion of specific metabolic waste products and volatile organic compounds.

Evidence for · 4
Excretion and perception of a characteristic odor in urine after asparagus ingestion: a psychophysical and genetic study.
2011
Demonstrates that ingestion of asparagus leads to the excretion of specific sulfurous metabolites that cause a characteristic urine odor.
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ML, P., C, B., FF, D., & DR, R. (2011). Excretion and perception of a characteristic odor in urine after asparagus ingestion: a psychophysical and genetic study.. doi.org. https://doi.org/10.1093/chemse/bjq081

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More for · 3
Mapping of Urinary Volatile Organic Compounds by a Rapid Analytical Method Using Gas Chromatography Coupled to Ion Mobility Spectrometry (GC–IMS)
2022
Shows that urine contains numerous volatile organic compounds resulting from metabolic pathways, which can include sulfur and other odorous compounds.
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Riccio, G., Baroni, S., Urbani, A., & Greco, V. (2022). Mapping of Urinary Volatile Organic Compounds by a Rapid Analytical Method Using Gas Chromatography Coupled to Ion Mobility Spectrometry (GC–IMS). doi.org. https://doi.org/10.3390/metabo12111072

Identification and Quantification of Volatile Ramson-Derived Metabolites in Humans.
2018
Identifies specific volatile metabolites excreted in urine following the consumption of ramson, contributing directly to its characteristic aroma.
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L, S., C, S., T, A., & A, B. (2018). Identification and Quantification of Volatile Ramson-Derived Metabolites in Humans.. doi.org. https://doi.org/10.3389/fchem.2018.00410

Exploring Trimethylaminuria: Genetics and Molecular Mechanisms, Epidemiology, and Emerging Therapeutic Strategies.
2024
Explains trimethylaminuria, a metabolic syndrome where the accumulation of a specific waste product (trimethylamine) causes a distinct fish-like body and urine odor.
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A, S., R, D., A, C., E, V., C, S., S, A., & G, G. (2024). Exploring Trimethylaminuria: Genetics and Molecular Mechanisms, Epidemiology, and Emerging Therapeutic Strategies.. doi.org. https://doi.org/10.3390/biology13120961

What does the evidence say?

The retrieved papers consistently show that urinary odors, such as those caused by asparagus, ramson, or metabolic conditions like trimethylaminuria, are directly linked to the excretion of specific metabolic waste products and volatile organic compounds.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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