You can’t flip a switch and make allergies disappear, but several treatments can dramatically reduce or even eliminate allergic reactions over time. The closest thing to a cure is immunotherapy, which retrains your immune system to stop overreacting to harmless substances like pollen, dust, or certain foods. Other approaches range from early prevention strategies in infants to newer treatments that raise your tolerance threshold for specific food allergens.
Why Your Body Overreacts in the First Place
An allergic reaction starts when your immune system misidentifies something harmless, like peanut protein or cat dander, as a threat. It produces a specific type of antibody (IgE) that triggers inflammation, histamine release, and all the familiar symptoms: sneezing, itching, swelling, or in severe cases, anaphylaxis. The goal of every serious allergy treatment is to shift this immune response so your body learns to tolerate the trigger instead of attacking it.
In people who aren’t allergic, a category of immune cells called regulatory T cells keeps the peace. These cells actively suppress the inflammatory response before it starts. In allergic individuals, a different set of immune cells dominates, driving IgE production and inflammation. The most effective treatments work by restoring that regulatory balance, essentially reprogramming the immune system at the cellular level.
Immunotherapy: The Closest Thing to a Cure
Allergen immunotherapy is the only treatment that changes the underlying immune response rather than just masking symptoms. It works by exposing you to gradually increasing amounts of your trigger allergen over months to years, until your immune system shifts from an overreactive state to a tolerant one. During this process, your body produces more regulatory T cells and starts making a different type of antibody (IgG4) that blocks allergic reactions instead of causing them.
There are two main forms. Subcutaneous immunotherapy (allergy shots) involves injections at a clinic, typically weekly during an initial buildup phase and then monthly for three to five years. Sublingual immunotherapy (allergy drops or tablets) involves placing a small dose of allergen under your tongue daily at home. Both work for common environmental allergens like pollen, dust mites, mold, and pet dander.
Research from Johns Hopkins shows that allergy shots tend to reduce symptoms and medication use more than sublingual therapy in head-to-head comparisons. However, both forms produce similar improvements in overall quality of life and combined symptom scores. The trade-off is convenience: sublingual therapy doesn’t require clinic visits, while shots may deliver stronger symptom relief.
After completing a full three-to-five-year course, some people stay symptom-free even after stopping treatment. Others eventually need to resume. There’s no guaranteed timeline for how long the benefits last, and individual results vary widely depending on the allergen and the person.
Food Allergy Treatments
Food allergies have historically been managed purely through avoidance, but that’s changing. Oral immunotherapy (OIT) for peanut allergy is now available, and it follows a similar principle to allergy shots: gradually increasing exposure to build tolerance. The process involves eating small, measured amounts of peanut protein daily, starting with tiny doses and working up to a maintenance level.
The maintenance dose is still being refined. Early clinical trials targeted around 4,000 mg of peanut protein per day, but recent research is evaluating whether much smaller maintenance doses of 30 to 300 mg can provide adequate protection. The goal isn’t necessarily to let you eat peanut butter sandwiches freely. It’s to raise your threshold high enough that accidental exposure won’t trigger a dangerous reaction.
Side effects during OIT are common. In clinical trials of the FDA-approved peanut OIT product, about 76% of participants experienced treatment-related side effects compared to 58% on placebo. The most frequent issues were skin reactions (49%), gastrointestinal problems like stomach pain and nausea (46%), and respiratory symptoms (35%). About 11% of treated participants needed epinephrine at some point during the process, and anaphylactic reactions occurred in roughly 2% during the dose-increase phase and 7% during maintenance.
A different approach for food allergies uses an injectable medication that targets IgE antibodies directly. The FDA has approved this treatment to reduce the severity of allergic reactions in people with IgE-mediated food allergies, including children as young as one year old. It doesn’t eliminate the allergy, but it raises the amount of allergen your body can tolerate before reacting, providing a safety net against accidental exposures.
Skin Patch Immunotherapy
A peanut allergy patch for children ages 4 to 7 recently completed a successful Phase 3 clinical trial. The patch delivers tiny amounts of peanut protein through the skin daily. The FDA has granted it a breakthrough therapy designation, and the manufacturer plans to submit for approval in the first half of 2026. It’s not yet available for purchase in any country, but it represents a less invasive alternative to daily oral dosing for young children.
Preventing Allergies Before They Start
For parents of infants, the most powerful tool may be early introduction of allergenic foods. Guidelines from the National Institute of Allergy and Infectious Diseases recommend introducing peanut-containing foods as early as 4 to 6 months for babies at highest risk (those with severe eczema or egg allergy). Babies with mild to moderate eczema should start around 6 months. Babies with no eczema or food allergy can have peanut-containing foods introduced freely alongside other solids.
The recommended amount is about 6 to 7 grams of peanut protein per week, spread across three or more feedings. This is roughly equivalent to a few teaspoons of smooth peanut butter mixed into purees or cereal, given several times a week. This approach was validated by a landmark trial showing that early, regular peanut exposure reduced peanut allergy rates by over 80% in high-risk infants compared to avoidance. For babies with severe eczema or existing egg allergy, allergy testing before the first introduction is recommended.
What About Supplements and Natural Remedies?
Many people search for natural ways to reduce allergies, and a few herbal products have been studied. Butterbur is probably the most researched, with a 2007 systematic review identifying six randomized controlled trials suggesting it may help with seasonal nasal allergies. Some of those trials reported effects similar to non-drowsy antihistamines.
However, the evidence is inconsistent. A controlled trial of 35 patients taking butterbur (50 mg twice daily) for two weeks found no significant improvement in nasal airflow, nasal symptoms, eye symptoms, or quality of life compared to placebo. A separate study measuring skin reactions found that butterbur failed to reduce histamine or allergen responses, while a standard antihistamine significantly reduced both. The takeaway: butterbur may offer mild relief for some people, but the evidence doesn’t support it as a reliable treatment.
Quercetin, a compound found in onions, apples, and berries, is often marketed as a natural antihistamine. It does stabilize the cells that release histamine in lab studies, but high-quality human trials are limited. No herbal supplement has been shown to retrain the immune system the way immunotherapy does. If your allergies are mild and seasonal, antihistamines and nasal corticosteroid sprays remain far more effective and better studied than any supplement.
Choosing the Right Approach
Your best option depends on what you’re allergic to and how much it affects your life. For seasonal or environmental allergies that don’t respond well to antihistamines and nasal sprays, immunotherapy offers the potential for lasting relief. The commitment is real: years of regular treatment with no guarantee of permanent results, but many people find their symptoms drop significantly within the first year.
For food allergies, the landscape is evolving quickly. Oral immunotherapy is available now for peanut allergy, with new products and approaches in development for other foods. These treatments don’t erase the allergy entirely, but they can mean the difference between a life-threatening reaction from a trace exposure and no reaction at all.
For infants, early and regular introduction of allergenic foods is the single most effective prevention strategy currently available. It’s simple, free, and supported by strong evidence. If you have a family history of food allergies, starting early is one of the few things that can genuinely prevent allergies from developing in the first place.