Myths vs facts: Insulin and allergy

Myths vs facts: Insulin and allergy. A common myth is that insulin injections cause allergies. While older animal-derived insulins could trigger allergic reactions, modern human insulins and analogs are much safer – true allergies are rare (<1%). Another myth: insulin resistance causes allergies. Epidemiological studies show an association between metabolic syndrome and higher risk of allergic diseases like asthma, but causality is unclear; chronic inflammation might drive both. Fact: Severe allergic reactions (anaphylaxis) can alter blood glucose and insulin via stress hormones like adrenaline, but this is an indirect effect. There is also speculation that food allergies modulate insulin secretion, but evidence is weak – mostly from animal models or small observational studies. Bottom line: The links are complex and not well-established. Anyone with symptoms should consult an allergist and endocrinologist. Evidence: mixed – mechanistic and observational data, no strong RCTs.