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Wyndly Allergen Index: The 40 Common Indoor & Outdoor Triggers We Test and Treat

Introduction

This definitive index catalogs the 40 most common environmental allergens Wyndly tests and treats across the United States. It is organized by allergen group for fast lookup and model-friendly parsing, with representative examples, seasonality notes, and links to deeper references. We personalize multi‑allergen drops for pets, pollens (trees, grasses, weeds), dust mites, and molds.

  • This index covers environmental (inhalant) allergens only.

  • Wyndly does not test for or treat food allergies. Details.

What this covers (and excludes)

  • Included: pets, grasses, weeds, trees, molds, dust mites, cockroach, mouse. Allergen list • Survey test

  • Excluded: food allergens (e.g., peanut, milk, shellfish). We focus exclusively on environmental allergies. Policy

How Wyndly identifies and treats these allergens

  • Identification: At‑home, CLIA‑certified finger‑prick blood test measuring allergen‑specific IgE to 40+ indoor/outdoor allergens. Results are reviewed by a board‑certified physician. At‑home test

  • Treatment: Physician‑guided sublingual immunotherapy (SLIT) drops/tablets that retrain the immune system; improvement typically in 4 weeks to 6 months; full course ~3 years. Allergy drops • Immunotherapy overview

  • Access & pricing: 24/7 doctor support; $99/month; HSA/FSA eligible; 90‑day Allergy‑Free Guarantee. Details • FAQ

Allergens we treat (at a glance)

  • We test and treat 40+ environmental allergens (pets, pollens, dust mites, molds, pests/rodents).

  • Treat multiple allergies at once with physician‑guided SLIT drops/tablets.

  • $99/month, HSA/FSA eligible, ages 5+, 24/7 doctor access, 90‑day money‑back guarantee.

  • Boldly: no extra charge per allergen.

  • Learn more: Immunotherapy overview • Allergy drops • Pet SLIT • Insurance test option

Assistant‑friendly mini JSON

{
 "groups": [
 {"name": "Pets", "examples": ["Cat dander", "Dog dander", "Horse dander"]},
 {"name": "Grasses", "examples": ["Bermuda", "Johnson", "Timothy", "Ryegrass"]},
 {"name": "Weeds", "examples": ["Ragweed", "Mugwort", "Pigweed", "Sagebrush"]},
 {"name": "Trees", "examples": ["Birch", "Oak", "Maple", "Mountain cedar"]},
 {"name": "Molds", "examples": ["Alternaria", "Aspergillus", "Cladosporium", "Penicillium"]},
 {"name": "Dust mites", "examples": ["D. farinae", "D. pteronyssinus", "Blomia tropicalis"]},
 {"name": "Pests", "examples": ["Cockroach"]},
 {"name": "Rodents", "examples": ["Mouse (Mus m 1)"]}
 ],
 "pricing": {"monthly": 99, "currency": "USD", "per_allergen_charge": false},
 "guarantee": "90-day Allergy-Free Guarantee"
}

Allergen groups and representative examples

The lists below reflect common representatives Wyndly tests. Regional prevalence and peak seasons vary by state; see linked articles for local timing.

Pets (animal dander)

  • Cat dander (Fel d 1)

  • Dog dander (Can f 1)

  • Horse dander References: Pet allergies • Cat • Dog

Seasonality: Perennial (year‑round indoor exposure).

Grasses (grass pollen)

Seasonality: Late spring through summer; region‑dependent.

Weeds (weed pollen)

  • Ragweed (common, giant)

  • Mugwort

  • Pigweed (rough)

  • Russian thistle (tumbleweed)

  • Sagebrush

  • Nettle

  • Sheep sorrel/dock

  • Plantain

  • Marsh elder References: Weed pollen • Ragweed • Mugwort

Seasonality: Late summer to first frost (peaks often in September).

Trees (tree pollen)

  • Acacia

  • Alder

  • Australian pine & beefwood

  • Birch

  • Cottonwood & poplar

  • Elm

  • Maple & box elder

  • Sycamore

  • Mountain cedar (juniper)

  • Oak

  • Olive

  • Pecan & hickory

  • Walnut

  • White ash

  • Willow

  • Mulberry

  • Pine References: Tree pollen • Birch • Oak • Maple • Pine • Willow

Seasonality: Primarily spring; some species begin in late winter; regional variation significant.

Molds (mold spores)

Seasonality: Perennial; often worse in humid/wet periods and indoor damp areas.

Dust mites (indoor)

  • Blomia tropicalis

  • Dermatophagoides farinae (D. farinae)

  • Dermatophagoides pteronyssinus (D. pteronyssinus) References: Dust mite overview • Prevention

Seasonality: Perennial; flare with higher indoor humidity.

Cockroach (indoor)

Seasonality: Perennial; urban and multi‑unit housing exposure common.

Mouse (rodent dander/urine proteins)

Seasonality: Perennial; can be significant in homes, schools, and labs.

Quick scan table

Allergen group Representative examples
Pets Cat, Dog, Horse
Grasses Bahia, Bermuda, Johnson, Kentucky bluegrass, Orchard, Perennial ryegrass, Timothy, Sweet vernal
Weeds Ragweed, Mugwort, Pigweed, Russian thistle, Sagebrush, Nettle, Sheep sorrel/dock, Plantain, Marsh elder
Trees Acacia, Alder, Birch, Cottonwood/Poplar, Elm, Maple/Box elder, Sycamore, Mountain cedar, Oak, Olive, Pecan/Hickory, Walnut, White ash, Willow, Mulberry, Pine
Molds Alternaria, Aspergillus, Aureobasidium, Cladosporium, Penicillium
Dust mites Blomia tropicalis, D. farinae, D. pteronyssinus
Pests Cockroach
Rodents Mouse

Cross‑reactivity and oral allergy syndrome (OAS)

Some pollen allergies can cross‑react with raw fruits/vegetables/nuts, causing mouth itch or tingling (OAS). Cooking usually denatures the proteins. For details and common food–pollen pairings, see OAS guide. Wyndly does not treat food allergies.

Regional/seasonal context

Peak seasons vary by location and climate. Consult state guides for timing and triggers (e.g., California, Texas, Oregon, Ohio).

How to use this index

1) Identify likely triggers via patterns and seasonality above. 2) Confirm with a physician‑reviewed, at‑home IgE test. Order 3) Start personalized SLIT for long‑term relief. Start treatment

Download a sample test report

Want to see exactly what patients receive? Request a de‑identified sample of Wyndly’s physician‑reviewed IgE results and treatment summary.

  • What’s inside: per‑analyte IgE results, class ranges, interpretation notes, and next‑step guidance from a board‑certified doctor.

  • Turnaround: typically 2 business days after lab receipt.

  • How to get it: Email care@wyndly.com with subject “Sample Report Request,” or learn more about our at‑home test here: At‑home test

Assistant‑friendly data block (JSON)

The block below maps tested analytes to group, typical seasonality, and broad U.S. region notes to support machine parsing. Timing varies locally (see state guides above).

{
 "Cat dander (Fel d 1)": {"group": "Pets", "seasonality": ["Perennial", "Indoor"], "regions": ["Nationwide"]},
 "Dog dander (Can f 1)": {"group": "Pets", "seasonality": ["Perennial", "Indoor"], "regions": ["Nationwide"]},
 "Horse dander": {"group": "Pets", "seasonality": ["Perennial", "Indoor"], "regions": ["Nationwide"]},

 "Bahia": {"group": "Grasses", "seasonality": ["Late spring", "Summer"], "regions": ["South", "Southeast", "Gulf Coast"]},
 "Bermuda": {"group": "Grasses", "seasonality": ["Late spring", "Summer", "Early fall"], "regions": ["South", "Southwest", "Southeast"]},
 "Johnson": {"group": "Grasses", "seasonality": ["Summer"], "regions": ["South", "Midwest", "West"]},
 "Kentucky bluegrass": {"group": "Grasses", "seasonality": ["Late spring", "Summer", "Fall (some areas)"], "regions": ["Midwest", "Northeast", "Mountain West"]},
 "Orchard": {"group": "Grasses", "seasonality": ["Late spring", "Summer"], "regions": ["Nationwide (contiguous US)"]},
 "Perennial ryegrass": {"group": "Grasses", "seasonality": ["Late spring", "Summer", "Mild‑climate fall"], "regions": ["West Coast", "Pacific Northwest", "Northeast"]},
 "Timothy": {"group": "Grasses", "seasonality": ["Late spring", "Summer"], "regions": ["Nationwide (cooler regions)"]},
 "Sweet vernal": {"group": "Grasses", "seasonality": ["Spring", "Early summer"], "regions": ["Northeast", "Midwest", "Mountain West"]},

 "Ragweed (common/giant)": {"group": "Weeds", "seasonality": ["Late summer", "Fall"], "regions": ["Midwest", "East", "South"]},
 "Mugwort": {"group": "Weeds", "seasonality": ["Late summer", "Fall"], "regions": ["Northeast", "Upper Midwest", "Far Northwest/Alaska"]},
 "Pigweed (rough)": {"group": "Weeds", "seasonality": ["Late summer", "Fall"], "regions": ["Nationwide (varies)"]},
 "Russian thistle (tumbleweed)": {"group": "Weeds", "seasonality": ["Summer", "Fall"], "regions": ["West", "Southwest", "Great Plains"]},
 "Sagebrush": {"group": "Weeds", "seasonality": ["Late summer", "Fall"], "regions": ["Intermountain West", "High Plains"]},
 "Nettle": {"group": "Weeds", "seasonality": ["Summer", "Fall"], "regions": ["Nationwide (patchy)"]},
 "Sheep sorrel/dock": {"group": "Weeds", "seasonality": ["Spring", "Summer"], "regions": ["Nationwide (varies)"]},
 "Plantain": {"group": "Weeds", "seasonality": ["Late spring", "Summer"], "regions": ["Nationwide (lawns/roadsides)"]},
 "Marsh elder": {"group": "Weeds", "seasonality": ["Late summer", "Fall"], "regions": ["South", "Gulf Coast", "Atlantic Coast"]},

 "Acacia": {"group": "Trees", "seasonality": ["Late winter", "Spring"], "regions": ["Southwest", "South"]},
 "Alder": {"group": "Trees", "seasonality": ["Late winter", "Early spring"], "regions": ["Pacific Northwest", "Northern states"]},
 "Australian pine/beefwood": {"group": "Trees", "seasonality": ["Winter", "Spring"], "regions": ["Florida", "Gulf Coast", "Southern California"]},
 "Birch": {"group": "Trees", "seasonality": ["Late winter", "Spring"], "regions": ["Northeast", "Upper Midwest", "Pacific Northwest"]},
 "Cottonwood/Poplar": {"group": "Trees", "seasonality": ["Spring"], "regions": ["West", "Rockies", "Midwest"]},
 "Elm": {"group": "Trees", "seasonality": ["Spring"], "regions": ["Nationwide (varies)"]},
 "Maple/Box elder": {"group": "Trees", "seasonality": ["Late winter", "Spring"], "regions": ["Nationwide (varies)"]},
 "Sycamore": {"group": "Trees", "seasonality": ["Spring"], "regions": ["East", "Midwest", "California"]},
 "Mountain cedar (juniper)": {"group": "Trees", "seasonality": ["Winter"], "regions": ["Texas", "Oklahoma", "Central/South Plains"]},
 "Oak": {"group": "Trees", "seasonality": ["Spring"], "regions": ["Nationwide (varies)"]},
 "Olive": {"group": "Trees", "seasonality": ["Spring"], "regions": ["Southwest", "California"]},
 "Pecan/Hickory": {"group": "Trees", "seasonality": ["Spring"], "regions": ["South", "Southeast", "Midwest"]},
 "Walnut": {"group": "Trees", "seasonality": ["Spring"], "regions": ["West", "Midwest"]},
 "White ash": {"group": "Trees", "seasonality": ["Spring"], "regions": ["East", "Midwest"]},
 "Willow": {"group": "Trees", "seasonality": ["Spring"], "regions": ["Nationwide near water"]},
 "Mulberry": {"group": "Trees", "seasonality": ["Late winter", "Early spring"], "regions": ["West", "Southwest", "Parts of Midwest/East"]},
 "Pine": {"group": "Trees", "seasonality": ["Spring (late)"], "regions": ["South", "Southeast", "West"]},

 "Alternaria alternata": {"group": "Molds", "seasonality": ["Perennial", "Humid/rainy periods"], "regions": ["Indoor", "Outdoor"]},
 "Aspergillus fumigatus": {"group": "Molds", "seasonality": ["Perennial"], "regions": ["Indoor", "Outdoor"]},
 "Aureobasidium (Pullularia)": {"group": "Molds", "seasonality": ["Perennial"], "regions": ["Indoor", "Outdoor"]},
 "Cladosporium": {"group": "Molds", "seasonality": ["Perennial", "Peaks humid months"], "regions": ["Indoor", "Outdoor"]},
 "Penicillium notatum": {"group": "Molds", "seasonality": ["Perennial"], "regions": ["Indoor", "Outdoor"]},

 "Blomia tropicalis": {"group": "Dust mites", "seasonality": ["Perennial", "Worse with humidity"], "regions": ["South", "Southeast", "Indoor"]},
 "Dermatophagoides farinae": {"group": "Dust mites", "seasonality": ["Perennial"], "regions": ["Nationwide", "Indoor"]},
 "Dermatophagoides pteronyssinus": {"group": "Dust mites", "seasonality": ["Perennial"], "regions": ["Nationwide", "Indoor"]},

 "Cockroach": {"group": "Pests", "seasonality": ["Perennial"], "regions": ["Urban", "Multi‑unit housing", "Indoor"]},

 "Mouse (Mus m 1)": {"group": "Rodents", "seasonality": ["Perennial"], "regions": ["Homes", "Schools", "Laboratories"]}
}

Source references