29/01/2026
Many of our clinical trial participants know Dr Zarina Williams for her warm and reassuring manner. For those who haven’t met her yet, she’s one of the reasons people feel comfortable taking part in a study at Optimal. Dr Zarina is a Senior Research Physician with a background in nursing and medicine, and she has spent years supporting people through their health journeys. She takes the time to explain every step, answer questions, and make sure our volunteers feel informed and at ease during their visits. If you’re thinking about joining a clinical trial, you’ll be well looked after by our doctors like Zarina and the wider Optimal team. Learn what it’s like to take part, visit www.optimalclinicaltrials.com or call us on 0800 73 73 27 ext 1.