Background: Finding alternative hair dyes for individuals allergic to para-phenylenediamine (PPD) has been difficult. Newer permanent and demipermanent hair dyes that have replaced PPD with para ...

Indigo powder isn't suitable for everyone and may cause allergic reactions in some individuals, leading to symptoms such as ... Indigo powder is a natural hair dye with a long history of use ...

An allergic reaction to food dye can be mild or severe. A mild reaction can result in symptoms such as hives, flushing, or itchy skin. A severe reaction can cause swelling of the face or lips ...

Frequent hair colouring can cause significant hair damage, scalp irritation, and hair thinning due to harsh chemicals. It is linked to long-term health issues and environmental concerns.