Articles on Allergies

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If one has a reaction to a new food, is the other more likely to as well? BjelicaS/iStock via Getty Images Plus

Are twins allergic to the same things?

An allergic reaction happens when your immune system overreacts to something that should be harmless. Whether that happens can be thanks to your genes, your environment or a combination.
Iron carries oxygen throughout the body, but ironically, it can also make it harder to breathe for people with asthma. Hiroshi Watanabe/Stone via Getty Images

Iron fuels immune cells – and it could make asthma worse

Asthma attacks can result from immune cells overreacting to a harmless allergen. Tamping down iron levels in certain immune cells can help control their activity.

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