{"hq_id":"hq-p-hom-000211","name":"Nickel Allergy and Everyday Exposure (Jewelry, Coins, Food, Cookware)","category":{"primary":"household","secondary":"allergen","tags":["nickel","allergy","contact dermatitis","jewelry","coin","belt buckle","food","cookware","10-20%"]},"product_tier":"HOM","overall_risk_level":"low","description":"Nickel contact allergy affects 10-20% of the global population (higher in women — jewelry exposure). Nickel is ubiquitous: jewelry, coins, belt buckles, eyeglass frames, buttons, zippers, phone cases, keys, stainless steel cookware (304 contains 8-10% nickel), canned food, and even some foods (chocolate, nuts, legumes). EU REACH restricts nickel release from articles in prolonged skin contact to 0.5 μg/cm²/week. US has no equivalent restriction. Once sensitized, nickel allergy is lifelong.","synthesis":{"derived_risk_level":"severe","synthesis_confidence":0.731,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.208,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"sensitive_populations":"10-20% of population (higher in women), nickel-sensitized individuals","overall_risk":"low","primary_concerns":["10-20% population prevalence — most common contact allergen worldwide","Ubiquitous exposure: jewelry, coins, buttons, cookware, food","US has no nickel release limit (EU REACH: 0.5 μg/cm²/week)","Once sensitized, allergy is lifelong — avoidance is only management"],"exposure_routes":"Dermal (prolonged metal contact); oral (dietary nickel, cookware leaching)"},"exposure":{"routes":["dermal","oral"],"contact_types":["skin_prolonged","oral_direct"],"users":["adult","child"],"duration":"hours","frequency":"daily","scenarios":["Jewelry contact dermatitis (ears, neck, wrists — most common)","Belt buckle, jean button, zipper dermatitis (waistline)","Stainless steel cookware leaching nickel into acidic food","Dietary nickel from chocolate, nuts, legumes, whole grains"],"notes":"Nickel sensitization is lifelong — once allergic, always allergic. EU REACH Annex XVII Entry 27: limits nickel release from prolonged-contact articles to 0.5 μg/cm²/week. US has no equivalent regulation. Dimethylglyoxime (DMG) test: home test for nickel in metal objects (spot test, $10-15). Stainless steel 316 leaches less nickel than 304. Titanium and platinum jewelry are nickel-free. Low-nickel diet can reduce systemic dermatitis in severely allergic individuals."},"consumer_guidance":{"usage_warning":"If nickel-allergic: use DMG spot test on metal objects before prolonged contact. Choose titanium, platinum, or surgical stainless steel (316) jewelry. Apply clear nail polish to metal buttons and snaps as barrier. 316 stainless cookware leaches less nickel than 304. Low-nickel diet may help systemic symptoms.","safer_alternatives":["Titanium or platinum jewelry (nickel-free)","316 stainless steel cookware (lower nickel leaching than 304)","Clear nail polish barrier on metal buttons, snaps, zippers","DMG spot test kit for testing metal objects ($10-15)"],"red_flags":[{"indicator":"Product not tested for or labeled for specific vulnerable population","meaning":"Standard safety data may not apply to your specific condition.","action":"Consult specialist physician for population-specific guidance."}],"green_flags":[{"indicator":"Physician-recommended or specifically tested for vulnerable population","meaning":"Safety evaluated for your specific condition/life stage.","verification":"Check for condition-specific certifications or physician guidance."}],"what_to_ask":[{"question":"Is this product safe for my specific health condition or life stage?","why_it_matters":"Safety varies dramatically by genetic background, life stage, and health condition.","good_answer":"Evaluated for your specific population with physician input.","bad_answer":"Generic safety data without population-specific consideration."}],"alternatives":[{"name":"Titanium or platinum jewelry","notes":"nickel-free"},{"name":"316 stainless steel cookware","notes":"lower nickel leaching than 304"},{"name":"Clear nail polish barrier on metal buttons, snaps, zippers","notes":"Alternative"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"EU","regulation":"REACH Annex XVII Entry 27 (Nickel Release)","citation":"REACH Regulation (EC) 1907/2006","requirements":"Nickel release from prolonged skin contact articles limited to 0.5 μg/cm²/week. Piercing jewelry: 0.2 μg/cm²/week.","compliance_status":null,"effective_date":"1994-01-01","enforcing_agency":"ECHA","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"Regular waste for accessories. Metal recycling.","hazardous_waste":false,"expected_lifespan":"varies"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-ino-000044","name":"Nickel (elemental)","role":"allergen","concentration_pct":"varies"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-ino-000044","compound_name":null,"role":"allergen","typical_concentration":"varies"}],"identifiers":{"common_names":["nickel allergy and everyday exposure (jewelry, coins, food, cookware)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Del Monte","manufacturer":"Del Monte Foods","market_position":"mass_market","notable":"Major canned food brand"},{"brand":"Campbell's","manufacturer":"Campbell Soup","market_position":"mass_market","notable":"Iconic canned soup brand"},{"brand":"Amy's Kitchen","manufacturer":"Amy's Kitchen","market_position":"premium","notable":"BPA-free lined organic canned foods"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"REACH Annex XVII Entry 27 (Nickel Release) (REACH Regulation (EC) 1907/2006)","jurisdiction":"EU","year":1994,"citation":"REACH Regulation (EC) 1907/2006","id":"src_68d0f193"},{"id":"iarc_chromium_v100c_2012","type":"regulatory","title":"IARC Monographs Volume 100C: Arsenic, Metals, Fibres and Dusts — Chromium (VI) Compounds Group 1 (Lung Cancer, Nasal/Sinus Cancer), Nickel Compounds Group 1, Beryllium Group 1 (2012)","year":2012,"inherited_from_compound":"hq-c-ino-000044"},{"id":"epa_ccl5_2022","type":"regulatory","title":"US EPA: Contaminant Candidate List 5 (CCL5) — Final List of Unregulated Contaminants for Regulatory Evaluation under SDWA (2022); includes nickel, cobalt, vanadium, PFAS, and 97 additional chemical and microbial contaminants","year":2022,"inherited_from_compound":"hq-c-ino-000044"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:24:42.333Z"}}