Thank you for taking part..
Anyone can take part in this study as long as they are:
Aged 18 years or older and currently living in the UK or New Zealand
Are able to read English well enough to complete the survey
Are able to provide a sample of hair which is at least 1cm long (taken from the root end) and 3mm in width (optional).
Able to confirm they have understood what the study is about and agree to being involved