CLAIM CARD
The population base is narrow, restricting external validity. Clinical cohorts enrolled exclusively adult cancer patients—primarily lung, pancreatic, and glioblastoma subtypes (Somlyai 2025, Somlyai 2023, Boros 2021, Gyongyi 2013)—with no evidence in pediatric, pregnant, or elderly non-oncologic populations. Geographic and institutional diversity is also limited; the Hungarian research group behind Somlyai 2025 and Somlyai 2023 accounts for a substantial share of the clinical data, and independent replication outside this network is absent from the corpus. Preclinical animal studies used young-adult rodents (Halenova 2019, Basov 2019), whose metabolic and deuterium-turnover kinetics may not generalize to aged or metabolically compromised humans. The obesity-relevant rat model (Halenova 2019) demonstrated restored body-weight index and serotonin levels after 3 weeks of DDW at 10 ppm, yet no parallel human dietary-intervention trial exists to bridge this finding.
Evidence grade: exploratory
Contradiction status: none
Publication: d8263221-9f0a-41ec-95ec-4711d2e47db6
Provenance: Derivation Web chain
Citation Support
source_1Somlyai 2025source_2Somlyai 2023source_3Boros 2021source_4Korchinsky 2024source_5Molnar 2021