Why Do Most Indians and Immigrants Develop Allergies After Moving to the USA?

The phenomenon of developing allergies after relocating to the USA or other countries is complex and multifaceted. This article explores the key reasons behind this phenomenon, providing insights into the environmental, genetic, and lifestyle factors that contribute to allergy development.

Environmental Changes

The introduction to new allergens in the USA can trigger allergic reactions, a process known as allergic sensitization. Here are some notable points:

Different Pollens and Plants: The flora in the USA differs significantly from that in India. New allergens such as different types of pollen can trigger allergic reactions in individuals who have not been exposed to them before. Air Quality: Urban areas in the USA may have higher levels of pollution, exacerbating respiratory allergies and asthma. This pollution can include particulate matter, nitrogen dioxide, and other environmental pollutants that may not be present in India.

Dietary Changes

Changes in diet upon relocation can introduce new allergens to the immune system. Here are some dietary factors:

Introduction of New Foods: Moving to a new country often involves a change in diet. Foods that were not commonly consumed in India, such as certain dairy products, gluten-containing grains, or processed foods, may introduce allergens. Food Processing: The way food is processed and preserved in the USA, including the use of additives and preservatives, can also lead to sensitivities that were not present in the home country. This can include MSG, artificial colors, and preservatives.

Genetic Predisposition

Not all individuals who move to a new country develop allergies. Some individuals may have a genetic predisposition to develop allergies. These genetic factors can be triggered by exposure to specific environmental triggers in a new country.

Hygiene Hypothesis

The Hygiene Hypothesis suggests that a lack of early exposure to infectious agents, microbes, and parasites can lead to an increased susceptibility to allergic diseases. In a more sanitized environment, the immune system may overreact to harmless substances, leading to allergies.

Lifestyle Factors

Lifestyle changes can significantly impact the immune system and overall health. Here are some key factors:

Stress: Moving to a new country can be stressful. Stress has been associated with the exacerbation of allergies and asthma. Stress management techniques may be necessary for newly relocated individuals. Changes in Physical Activity: Differences in lifestyle, including changes in physical activity, can impact overall health and immune system responses. Maintaining a regular exercise routine can help in managing allergies.

Increased Awareness and Diagnosis

The USA has a higher awareness and better diagnostic tools for allergies. This can lead to more individuals being diagnosed with allergies who might have had mild symptoms that went unrecognized in their home countries.

Conclusion

The combination of these factors can lead to the development of allergies among immigrants from India and other countries after relocating to the USA. It is essential for individuals experiencing new allergies to consult healthcare professionals for proper diagnosis and management. Understanding the underlying factors can help in managing these conditions more effectively and adapting to a new environment.