Ilona Duffy, a GP from Monaghan, shares her insights on vitamins and supplements, offering medical advice on cautions around their use. Sarah Keogh, a registered dietitian and founder of Eat Well, discusses dietary deficiencies and the importance of vitamin D, especially in winter. They shed light on the pros and cons of creatine, the limited benefits of magnesium for sleep, and the necessity of checking dietary sources for hair health. The duo stresses informed decision-making regarding supplements, emphasizing evidence-based recommendations.