Topic
Allergens
Allergens is a recurring research topic on Health Canon. This hub collects related explainers and protocols, newest first, each with evidence grades and practical decision frameworks.
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Metabolic Health
Allergy and Inflammation Sex Axes: Puberty, Pregnancy, Autoimmunity, and Shared Markers
Allergy and autoimmunity show sex skews across the life course; hs-CRP remains a CV marker—not an allergy diagnostic for either sex.
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Hormones & Genes
Type 2 Inflammation Cytokines: IL-4, IL-5, IL-13, Alarmins & Biologic Targets
The shared cytokine program behind atopic dermatitis, allergic rhinitis, eosinophilic asthma, CRSwNP, and EoE—and why T2-high is not always “allergy.”
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Men's Health
Sleep, Inflammation & Allergy Control: Bidirectional Links Without Magic Cures
Short sleep raises inflammatory markers; allergic rhinitis and asthma wreck sleep—optimize both, substitute neither for indicated controllers.
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Women's Health
Sex Differences in Allergy & Autoimmunity: Pubertal Asthma Switch vs Female Autoimmune Bias
Boys dominate childhood asthma; women dominate adult severe asthma and most autoimmunity—different immune axes, not one slogan.
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Hormones & Genes
Non-IgE Hypersensitivity Pathways: FPIES, EoE, Contact & Cell-Mediated Allergy
Delayed food reactions, eosinophilic disease, and Type IV contact pathways—when IgE tests stay negative and the clock matters more than the panel.
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Hormones & Genes
Mast Cell & Basophil Effector Biology: Mediators, Triggers & Tryptase Kinetics
Tissue mast cells and circulating basophils release histamine, tryptase, lipids, and cytokines—IgE and non-IgE triggers, with tryptase as the practical activation clock.
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Hormones & Genes
Mast Cell Activation Syndrome: Consensus Criteria, Tryptase Rule & Overdiagnosis Risk
Vienna/AAAAI-aligned MCAS needs clinical episodes, laboratory mediator proof, and treatment response—not a symptom checklist.
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Environmental Health
Environmental Aeroallergens: Pollen, Dust Mite, Mold, Pet Dander & Cockroach
Seasonal outdoor versus perennial indoor allergens—sensitization plus exposure plus symptoms, with honest grades on avoidance gadgets.
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Environmental Health
Allergy vs Systemic Inflammation: Orthogonal Pathways, Shared Triggers
Type 2 mucosal allergy and sterile systemic residual inflammation are different programs—pollution can touch both without making CRP a hay-fever meter.
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Hormones & Genes
Allergy & Inflammation Testing: sIgE, SPT, OFC, FeNO, Eos & What Not to Order
History-first diagnostics for IgE disease versus T2 markers versus systemic CRP—stop using the wrong panel for the wrong question.
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Metabolic Health
IgE Type I Hypersensitivity Explained
Sensitization, FcεRI, mast-cell degranulation—minutes that define classic allergy.
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Metabolic Health
Eczema, Skin Barrier, and the Atopic March
Barrier failure can sensitize through skin; oral exposure may tolerize. March is not destiny.
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Metabolic Health
Allergic Rhinitis and Asthma: United Airways
One airway, shared T2 inflammation—ARIA asks about asthma in every rhinitis patient.
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Nutrition
Anti-Inflammatory Diet Patterns: What Holds Up Beyond the Label
Mediterranean-class patterns lower inflammatory tone; miracle-food lists usually do not.
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Women's Health
LEAP Trial Early Peanut Introduction: Prevention Without TikTok Chaos
High-risk infants, supervised strategy, 81% relative risk reduction—not unsupervised challenges.
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Nutrition
Food Allergens Big 9: Label Law, Cross-Reactivity, and Sesame
Milk, egg, peanut, tree nuts, soy, wheat, fish, crustacean shellfish, sesame—and what labels actually guarantee.
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Hormones & Genes
Allergens & Inflammation: IgE, Type 2 Pathways, CRP & MCAS Claims
Allergy is not the same as systemic inflammation. Separates IgE from non-IgE disease, maps Type 2 pathways, covers Big 9 foods and LEAP, hs-CRP bands, MCAS triad criteria, and lifestyle adjuncts that do not replace epinephrine.
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