Welcome to Callaghan Consulting International.
After more than 37 years working across cosmetic science, research, claims development and scientific communication, I now offer my consultancy on a more selective basis.
My work focuses on the areas where experience and independent judgement can make a particular difference: cosmetic claims development and substantiation, interpretation of scientific evidence, study strategy, troubleshooting, and scientific communication.
I work with ingredient suppliers, cosmetic brands and other organisations that value a thoughtful, evidence-led approach to claims and the science behind them.
Cosmetic claims exist at the meeting point between science, regulation, marketing and consumer expectation. Navigating that space requires more than finding the right words. It requires understanding what the evidence can genuinely support — and sometimes recognising what it cannot.
My approach has always been grounded in scientific integrity, informed decision-making and a simple principle: claims should reflect the evidence behind the product rather than asking the evidence to justify a claim that has already been decided.
As the cosmetic industry continues to evolve, I also write and speak extensively about the wider issues affecting claims, including emerging technologies, changing consumer expectations, regulatory challenges and the sometimes uncomfortable relationship between innovation, evidence and marketing.
Callaghan Consulting now operates on a deliberately limited basis, allowing me to concentrate on selected projects where my experience can provide particular value.
These may include claims strategy and troubleshooting, scientific and clinical study development, independent review of evidence, specialist workshops, scientific writing and advisory work.
If you have a particular claims or scientific challenge and believe my experience may be useful, you are welcome to contact me in confidence.
After more than 37 years working across cosmetic science, research, claims development and scientific communication, I now offer my consultancy on a more selective basis.
My work focuses on the areas where experience and independent judgement can make a particular difference: cosmetic claims development and substantiation, interpretation of scientific evidence, study strategy, troubleshooting, and scientific communication.
I work with ingredient suppliers, cosmetic brands and other organisations that value a thoughtful, evidence-led approach to claims and the science behind them.
Cosmetic claims exist at the meeting point between science, regulation, marketing and consumer expectation. Navigating that space requires more than finding the right words. It requires understanding what the evidence can genuinely support — and sometimes recognising what it cannot.
My approach has always been grounded in scientific integrity, informed decision-making and a simple principle: claims should reflect the evidence behind the product rather than asking the evidence to justify a claim that has already been decided.
As the cosmetic industry continues to evolve, I also write and speak extensively about the wider issues affecting claims, including emerging technologies, changing consumer expectations, regulatory challenges and the sometimes uncomfortable relationship between innovation, evidence and marketing.
Callaghan Consulting now operates on a deliberately limited basis, allowing me to concentrate on selected projects where my experience can provide particular value.
These may include claims strategy and troubleshooting, scientific and clinical study development, independent review of evidence, specialist workshops, scientific writing and advisory work.
If you have a particular claims or scientific challenge and believe my experience may be useful, you are welcome to contact me in confidence.
Theresa Callaghan PhD MBHMA
Cosmetic Claims Development & Scientific Affairs Specialist
Cosmetic Claims Development & Scientific Affairs Specialist