Fri Apr 18 12:04:58 UTC 2025: ## Twin Allergies: Shared Genes, Different Outcomes
**Kolkata, India (April 18, 2025)** – A new study sheds light on the complex relationship between genetics and allergies, particularly in twins. While identical twins share a higher likelihood of having the same allergies due to their identical genes, environmental factors play a significant role in determining individual allergic responses.
Dr. Breanne Hayes Haney, an allergist and immunologist, explains that allergies are triggered when the immune system misidentifies harmless substances (allergens) as threats. This can lead to symptoms ranging from mild (sneezing, runny nose) to life-threatening anaphylaxis (requiring immediate epinephrine treatment).
Several factors influence allergy development, including genetics, hygiene, and environment. Children raised on farms or with pets tend to have lower allergy rates, while city-dwelling children and those exposed to smoke are at higher risk. Early exposure to diverse foods also appears to be protective against food allergies.
The study highlighted that while identical twins share a higher percentage of allergies (60-70%) compared to fraternal twins, they are not guaranteed to have the same allergies. Differences in upbringing, environmental exposure, and other lifestyle factors can influence individual allergic responses.
Dr. Haney emphasizes the ongoing research into allergies and the complexity of determining which factors contribute most significantly to allergy development. The study underscores the importance of considering both genetic predisposition and environmental influences when understanding and managing allergies.
First Piper 