Preface Richard Faragher 1. Cellular senescence and NAD+: what are the links? Sophia Quigley 2. Biomarker for ageing: potential and pitfalls Lynne Cox 3. What chemists offer to ageing research Richard Hartley 4. You are what you eat - or are you? Exploring dietary versus topical anti-oxidants in skin ageing Oliver Dillon 5. Clinical trials: A simple guide for gerontologists Simona Reed 6. Towards an ethical framework for geroscience Richard Faragher