paraphenylenediamine (PPD) has a reputation for negative side effects. Contact with skin can cause irritation including redness, sores, itching, and burning. Occasionally, allergic reactions occur and involve swelling of the face and neck. 

Parabens are believed to disrupt hormone function by mimicking oestrogen. Too much oestrogen can trigger an increase in breast cell division and growth of tumours, which is why paraben use has been linked to breast cancer and reproductive issues.

Resorcinol is classified as a hazardous chemical. If it gets on your skin (or your scalp), it causes redness and pain.  According to the World Health Organization (WHO), animal studies show that resorcinol caused thyroid dysfunction. 

paraphenylenediamine (PPD) has a reputation for negative side effects. Contact with skin can cause irritation including redness, sores, itching, and burning. Occasionally, allergic reactions occur and involve swelling of the face and neck. 

Parabens are believed to disrupt hormone function by mimicking oestrogen. Too much oestrogen can trigger an increase in breast cell division and growth of tumours, which is why paraben use has been linked to breast cancer and reproductive issues.

Resorcinol is classified as a hazardous chemical. If it gets on your skin (or your scalp), it causes redness and pain.  According to the World Health Organization (WHO), animal studies show that resorcinol caused thyroid dysfunction. 

paraphenylenediamine (PPD) has a reputation for negative side effects. Contact with skin can cause irritation including redness, sores, itching, and burning. Occasionally, allergic reactions occur and involve swelling of the face and neck. 

Parabens are believed to disrupt hormone function by mimicking oestrogen. Too much oestrogen can trigger an increase in breast cell division and growth of tumours, which is why paraben use has been linked to breast cancer and reproductive issues.

Resorcinol is classified as a hazardous chemical. If it gets on your skin (or your scalp), it causes redness and pain.  According to the World Health Organization (WHO), animal studies show that resorcinol caused thyroid dysfunction. 

paraphenylenediamine (PPD) has a reputation for negative side effects. Contact with skin can cause irritation including redness, sores, itching, and burning. Occasionally, allergic reactions occur and involve swelling of the face and neck. 

Parabens are believed to disrupt hormone function by mimicking oestrogen. Too much oestrogen can trigger an increase in breast cell division and growth of tumours, which is why paraben use has been linked to breast cancer and reproductive issues.

Resorcinol is classified as a hazardous chemical. If it gets on your skin (or your scalp), it causes redness and pain.  According to the World Health Organization (WHO), animal studies show that resorcinol caused thyroid dysfunction. 

paraphenylenediamine (PPD) has a reputation for negative side effects. Contact with skin can cause irritation including redness, sores, itching, and burning. Occasionally, allergic reactions occur and involve swelling of the face and neck. 

Parabens are believed to disrupt hormone function by mimicking oestrogen. Too much oestrogen can trigger an increase in breast cell division and growth of tumours, which is why paraben use has been linked to breast cancer and reproductive issues.

Resorcinol is classified as a hazardous chemical. If it gets on your skin (or your scalp), it causes redness and pain.  According to the World Health Organization (WHO), animal studies show that resorcinol caused thyroid dysfunction.