{"id":"fcdbfc5e-d41f-5d8b-af4c-9e79a424547e","stable_key":"ea2f0904-ab2c-5d1e-a3d4-3f7ecdd70cd6:caf-urine-mg","predicate":"increases","statement":"Urinary magnesium/creatinine rose from 70 to 110 mg/g.","claim_class":"observational","status":"source_derived_draft","evidence_grade":"ungraded","direction":"positive","is_public":true,"mechanism_event_id":"796cdb91-94ad-574e-bcb3-5f1990756a44","mechanism_event_label":"The acute urine measurement increased.","subject":{"id":"ef028472-7c33-583d-b52e-40676004d370","slug":"caffeine","display_name":"Caffeine","entity_type_key":"small_molecule"},"object":{"id":"a298b414-0e07-568d-a469-d8aa3e8b8c14","slug":"urinary-magnesium-excretion","display_name":"Urinary magnesium excretion","entity_type_key":"cellular_process"},"evidence_count":1,"mechanism_event":{"id":"796cdb91-94ad-574e-bcb3-5f1990756a44","stable_key":"ea2f0904-ab2c-5d1e-a3d4-3f7ecdd70cd6:caf-urine-mg-event","event_type":"observed_relationship","label":"The acute urine measurement increased.","description":"Urinary magnesium/creatinine rose from 70 to 110 mg/g.","status":"provisional","compartment":null,"participants":[{"entity":{"id":"ef028472-7c33-583d-b52e-40676004d370","slug":"caffeine","display_name":"Caffeine","entity_type_key":"small_molecule"},"role":"subject","stoichiometry":null,"state_label":"","sequence_order":0,"notes":""},{"entity":{"id":"a298b414-0e07-568d-a469-d8aa3e8b8c14","slug":"urinary-magnesium-excretion","display_name":"Urinary magnesium excretion","entity_type_key":"cellular_process"},"role":"target","stoichiometry":null,"state_label":"","sequence_order":1,"notes":""},{"entity":{"id":"bff427ab-35f9-59c2-bb24-fd5953bbaec2","slug":"magnesium-ion","display_name":"Mg2+","entity_type_key":"ion"},"role":"context_participant","stoichiometry":null,"state_label":"","sequence_order":2,"notes":""}]},"contexts":[{"dimension":"evidence_access","value_text":"Primary abstract","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"experimental_model","value_text":"37 women, age 31–78; decaffeinated beverage with or without caffeine 6 mg/kg lean body mass; two-hour urine collection.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"limitations","value_text":"Acute renal handling. The exact tubular mechanism was unresolved; no long-term deficiency, bone loss or replacement requirement measured.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"Caffeine collection; salts, coffee, species and coexposure contexts retain their identities.","comparator":null,"unit":null,"notes":"","entity":{"slug":"caffeine","display_name":"Caffeine","entity_type_key":"small_molecule"}},{"dimension":"plain_language","value_text":"The acute urine measurement increased.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"Effects of dietary caffeine on renal handling of minerals in adult women. · 1990 · https://pubmed.ncbi.nlm.nih.gov/2402180/ · DOI 10.1016/0024-3205(90)90616-y","comparator":null,"unit":null,"notes":"","entity":null}],"evidence":[{"id":"f1eb98fc-1f63-5640-b4c7-874b7c199c74","evidence_kind":"source_excerpt","locator":"Lines 308-314","start_line":308,"end_line":314,"excerpt":"## caf-urine-mg\nThe acute urine measurement increased.\nUrinary magnesium/creatinine rose from 70 to 110 mg/g.\nModel: 37 women, age 31–78; decaffeinated beverage with or without caffeine 6 mg/kg lean body mass; two-hour urine collection.\nLimitations: Acute renal handling. The exact tubular mechanism was unresolved; no long-term deficiency, bone loss or replacement requirement measured.\nEvidence access: Primary abstract\nEffects of dietary caffeine on renal handling of minerals in adult women. · 1990 · https://pubmed.ncbi.nlm.nih.gov/2402180/ · DOI 10.1016/0024-3205(90)90616-y","model_system":"37 women, age 31–78; decaffeinated beverage with or without caffeine 6 mg/kg lean body mass; two-hour urine collection.","directness":"reported_statement","verification_status":"source_derived_draft","notes":"Original curation paraphrase; evidence access stated with the claim.","relationship":"supports","weight":1.0,"link_notes":"","source":{"id":"40a654db-878c-5471-bc6c-88f4f52599c0","stable_key":"import-ea2f0904-ab2c-5d1e-a3d4-3f7ecdd70cd6","title":"Caffeine: receptors, metabolism, nutrient interactions, adaptation and discovery questions (2026-09-18)","document_type":"imported_text","citation_label":"AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text.","file_path":"","sha256":"780d73d4abd45a0284d2cc0c646dbe8432ae347362891a4b98a19a61341a7325","revision_id":"f36ffb0a-d6df-522f-b783-5e30214b9e26","review_status":"unverified_draft","notes":""}}],"relations":[],"conflicts":[],"corrections":[],"research":null}