Why am I only allergic to Gain but no other laundry detergent Like what is in Gain that no other laundry has?

Your allergy to Gain laundry detergent could be due to specific ingredients or fragrances that are unique to that brand. Gain often contains certain surfactants, enzymes, or synthetic fragrances that might trigger allergic reactions in some individuals. It's possible that other detergents either lack these specific components or use different formulations that your body tolerates better. If you're concerned about your allergy, consulting with an allergist can help identify the specific allergens involved.