Paraphenylenediamine (PPD) Allergies and Safe Hair Colour Alternatives
Understanding Paraphenylenediamine (PPD) Allergies and Safe Hair Colour Alternatives Overview of Paraphenylenediamine (PPD) Paraphenylenediamine (PPD) is a chemical primer that is extensively used in permanent hair dyes and is also found in black henna tattoos. PPD and Allergic Reactions PPD is known to provoke allergic reactions, which can range from mild to moderate skin irritation […]
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