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.

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 ...

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 ...

Symptoms of an allergic reaction can include itching ... While Mehendi is a popular natural hair dye and conditioner, it's ...

However, some PPD-allergic patients may be able to tolerate PTDS and/or PTD as an alternative in some circumstances, they added. Patients with PTDS ACD should be warned that alternative hair dyes ...