She believes she is the first person in New Zealand to try it for Hodgkin lymphoma.
The Auckland hairdresser said losing her hair was “the least of my worries”.
She has also made several lifestyle changes, including a Mediterranean diet, cutting back on sugar, keeping active and drinking plenty of water.
Allen also praised her partner, Josh, who has been with her every step of the treatment.
“He’s been at every appointment. He’s stayed with me in hospital and he’s sorted out all our insurance and made every phone call. Honestly, I would not be able to do it without him.”