OLOGIES with Alie Ward
Episode: Allergology (ALLERGIES) with Dr. Zachary Rubin
Release Date: March 18, 2026

Episode Overview

This episode dives deeply into the science and lived experience of allergies with Dr. Zachary Rubin, a double board-certified allergist, immunologist, pediatrician, author, and prominent science communicator. Host Alie Ward and Dr. Rubin unpack everything from the basics (“what is an allergy?”) to nuanced questions about food sensitivities, immunotherapy, at-home allergy tests, the influence of climate, “botanical sexism”, and more. Dr. Rubin also shares personal anecdotes and answers many listener questions with rigor, empathy, and humor.

Key Discussion Points & Insights

What Is an Allergy? (04:53–08:57)

• Definition: Allergies are abnormal immune responses to foreign substances (allergens).

  • “Allergy is the study of abnormal immune system responses to foreign substances.” — Dr. Rubin [04:53]

• Allergy vs. Autoimmune Disease:

  • Allergies: The immune system attacks harmless foreign substances.
  • Autoimmune: The immune system attacks the body’s own tissues.
  • “An allergy is abnormal response to foreign substances. Autoimmune disease is an abnormal response to your healthy tissue.” — Dr. Rubin [05:39]

The Immunology of Allergies: How, Why, and Which Antibodies (06:20–10:29)

• Role of Antibodies:

  • Different types: IgG, IgA, IgM, IgE. IgE is “the allergy protein.”
  • IgE antibodies bind to allergens (like pollen, pet dander) and prime mast cells to release histamine and other chemicals.
  • Histamine’s role: Not just allergy symptoms—also regulates stomach acid, sleep, and appetite.
    • “Histamine is involved in stomach acid regulation, and it’s also produced in your brain... part of your sleep-wake cycle.” — Dr. Rubin [09:24]

• Why Antihistamines Make You Drowsy:

  • “If you take Benadryl, it gets into your brain, it blocks histamine ability there. You get tired.” — Dr. Rubin [09:55]

Allergies and Women's Health (10:29–12:41)

• Pepcid and period pain: Emerging anecdotal evidence, especially for PMDD.
  • “Estrogen acts on mast cells... releasing histamine, that could be causing some of the uncomfortable symptoms.” — Dr. Rubin [11:11]
  • But: “We don't have the clinical studies... right now, it's anecdotal evidence.” [12:16]

Severity and Type of Allergic Reactions (12:41–15:15)

• Respiratory vs. Systemic Allergies:

  • Respiratory: Sneezing, runny nose, asthma (e.g., cat dander).
  • Systemic: Anaphylaxis (e.g., shellfish)—can be life-threatening.
  • Notably, skin or blood tests don’t predict severity—history and context matter more.

• EpiPen/Epinephrine: Used to quickly stop life-threatening allergic reactions, but always see a doctor after.

Food Allergies, Introduction Timing, and the Peanut Paradigm (22:20–25:33)

• Shift in Guidance: Once, allergenic foods were delayed. New research (e.g., Bamba snack study) shows early, controlled introduction reduces peanut allergies by 80%.
  • “Earlier exposure now to these highly allergenic foods could potentially push the immune system towards tolerance.” — Dr. Rubin [24:49]
  • Most babies outgrow milk and egg allergies, but nut/seafood allergies are more persistent.

Pitfalls of At-home or Non-expert Allergy Testing (33:33–36:46)

• IgG Food Sensitivity Tests:

  • “That is a tolerance antibody... anything you’ve been exposed to, it’ll show up as positive.” — Dr. Rubin [34:12]
  • These tests are considered harmful, as they can promote unnecessary food avoidance and even cause new allergies through reintroduction.

• True IgE Allergy Testing: Should be guided by experienced specialists, with strong clinical context.

Distinguishing Allergy, Sensitivity, and Intolerance (37:26–41:15)

• Intolerance: Digestive problems (e.g., lactose intolerance is lack of lactase enzyme, not an allergy).
• True Food Allergy (IgE-mediated): Immediate, potentially life-threatening reaction.
• Celiac Disease: An autoimmune, not allergic, response to gluten.
• “When somebody says, hey, look, my child has a severe peanut allergy...many places are great, but when pop culture and the media talks about these things as if it's funny, ha ha...it makes people not understand the severity of it.” — Dr. Rubin [42:14]

Common Myths and Listener Questions

On Local Honey for Allergies (43:48–50:06)

• Myth: Eating local honey will desensitize you to local pollen.
• Fact: The kinds of pollen causing allergies aren’t in honey. Consuming honey does not help allergy symptoms.
  • “The pollen that you consume in those products is not the pollen you’re allergic to...there’s no plausible mechanism.” — Dr. Rubin [48:57]

Oral Allergy Syndrome / Pollen-Food Syndrome (50:06–54:37)

• Phenomenon: Itchy mouth/throat after eating certain raw fruits/vegetables among those with pollen allergies.
• Cause: Cross-reactivity—similar proteins in some pollens and certain foods.
• “You develop the pollen allergy...there’s a lot of similar features to certain fruits, vegetables, even nuts. So we call that cross reactivity...people get itching in their mouth, mild swelling, irritation in their throat.” — Dr. Rubin [51:19]
• Usually can eat the food cooked (proteins are broken down).

“Botanical Sexism” & Street Trees (54:37–56:38)

• Myth: Cities planted more male trees (vs. female) making allergies worse.
• Fact: Most street trees are hermaphrodites; increases in pollen are more linked to climate change than planting practices.
  • “Botanical sexism...is being misapplied...the real reason is...we've had rising temperatures...the pollen season is starting earlier and ending later.” — Dr. Rubin [56:38]

The Modern Allergy Crisis: Why Are Allergies Increasing? (56:38–59:10)

• Rising atmospheric CO₂ and global warming → longer, more intense pollen seasons.
• Pollution and urban environments exacerbate allergies and asthma.

The Science on Antihistamines & Daily Use (58:10–59:10)

• Second-generation antihistamines (Zyrtec, Claritin) are generally safe, but:
  • Long-term use may increase appetite/weight gain.
  • Stopping after long use can cause rare but severe itching (withdrawal).
    • “The FDA finally admitted...you may notice...I feel like my body is crawling with ants.” — Dr. Rubin [58:33]

Dust Mite Allergies & Bedding (60:18–61:38)

• Anti-Allergy Bedding: Can help by reducing exposure, but must be combined with other environmental controls, like air purifiers, frequent washing, and minimizing upholstered surfaces.

Eczema and Allergies (62:14–65:46)

• Food elimination rarely cures eczema; over-restriction can create new allergies.
• Skin barrier dysfunction and altered skin bacteria play bigger role.

Unexpected Allergic Reactions & Modern Challenges

• Gel Nail Allergies: Acrylate in gel nails can cause delayed hypersensitivity [65:46–66:31]
• Poison Ivy Sensitivity: Why some people are highly reactive and others less so [67:25–67:42]

Allergy Treatments & Immunotherapy (Allergy Shots) (67:42–70:40)

• Allergy shots gradually expose the immune system to allergens, building tolerance (not always a “cure”).
  • “It’s like taking your immune system to school, showing it the same thing over and over...until you get bored to death...for many, it works well. It worked well for me.” — Dr. Rubin [69:58]
• New methods: Intralymphatic immunotherapy (shots to groin lymph nodes) for quicker desensitization.

Diagnosing Allergies: Skin Prick vs. Blood Tests (70:40–72:19)

• Gold standard: Allergy skin tests, interpreted by a specialist with clinical context, are quick and usually more accurate; blood tests track changes over time.
• Note: The protein that triggers dust mite allergies is their poo! [72:18]

The Gray Zone: The Hardest Part of Allergy Medicine (72:45–74:30)

• “Living in the gray zone...sometimes we don’t always have the answers...I always come into my clinical practice with humility, that my patients know a lot more than I do, that I try to be a guide and a voice of risks and benefits...” — Dr. Rubin [72:45]

Personal Reflections & Motivation (74:30–76:53)

• Dr. Rubin’s motivation springs from family, mentorship, and the impact of giving people practical knowledge and reassurance.
• “If we can give people skills to help themselves, it can make a huge difference in this world.” — Dr. Rubin [76:45]

Notable Quotes & Memorable Moments

• On misleading allergy tests:
  “Just because a test exists...doesn’t mean it’s helpful.” — Dr. Rubin [35:25]

• On the myth of local honey:
  “It’s a tasty treat...for allergy purposes, there’s a big myth…” — Dr. Rubin [48:52]

• On media making fun of allergies:
  “It can be very difficult because...a lot of parents and kids are bullied over this issue because it’s not just a problem with you as the individual living with it. It affects families and communities.” — Dr. Rubin [42:31]

• On the hardest part of the job:
  “Living in the gray zone...especially for like patients with mast cell activation syndrome...I know that pain of uncertainty...if we can...live with that gray zone, I think we’ll be in a much better place.” — Dr. Rubin [72:45]

• On balancing professional and personal life:
  “How did you write a book and have a social media channel and have a practice? What the hell, man?” — Alie Ward [76:45]
  “I don’t sleep.” — Dr. Rubin [76:53]

Timestamps for Key Segments

• What is an allergy? [04:53]
• Antibodies & Histamine explained [07:14]
• Period pain, Pepcid, and histamine [10:29]
• Food vs. respiratory allergies [12:41]
• Early exposure and food allergies [22:20]
• Dangers of at-home food allergy testing [33:33]
• Oral allergy syndrome (cross-reactivity) [50:06]
• Street tree “botanical sexism” [54:37]
• Antihistamines, side effects, withdrawal [58:10]
• Dust mite allergy strategies [60:18]
• Eczema & allergy relationship [62:14]
• Allergy shots & immunotherapy [67:42]
• Diagnosing allergies: skin vs. blood [70:40]
• Living with uncertainty, empathy in medicine [72:45]

Actionable Takeaways

• Consult allergists, not at-home tests, when diagnosing allergies.
• Early exposure to common allergens in infancy (with medical guidance) reduces risk of lasting allergy.
• Understand the difference between intolerance, IgE-mediated allergy, and autoimmune syndromes like celiac.
• Oral allergy syndrome is common among pollen allergy sufferers and is often manageable by cooking fruit/vegetables.
• Antihistamines are generally safe long-term but should be titrated when stopping after extended use.
• Reduce dust mite exposure with a combination of strategies (bedding, purifiers, cleaning).
• Empathy, updated science, and context are vital—every patient, allergy, and treatment is individual.

Links

• Book: All About Allergies by Dr. Zachary Rubin
• Charity: Red Sneakers for Oakley (redsneakers.org)
• Dr. Rubin: @RubinAllergy on TikTok, Instagram, YouTube

Tone & Style

• Conversational, funny, but deeply informative. Alie’s asides and meta-commentary provide playful levity amid a rich scientific discussion. Dr. Rubin is matter-of-fact, approachable, empathetic, and refreshingly candid about the limits of current knowledge.

This episode offers a comprehensive, myth-busting, and compassion-fueled guide to allergies—perfect for anyone who has allergies, loves someone who does, or just wants to understand their immune system a little better.