Mary Ní Lochlainn researches the habits that lead to better health in older age. She does strength training, takes vitamin D, and does intermittent fasting. But the habits that Ní Lochlainn, 34, thinks are most important for healthy aging aren't expensive. Related storiesShe takes vitamin D supplements because people in the UK, where she lives, don't tend to get enough. AdvertisementNí Lochlainn takes vitamin D. Science Photo Library/Getty ImagesIntermittent fastingNí Lochlainn does intermittent fasting by not eating between her dinner and her breakfast in the late morning.

---

Persons: Mary Ní Lochlainn, —, Ní, Ní Lochlainn Organizations: Service, King's College London, Trinity College Dublin, Kings College London, National Cancer Institute, Getty