, Nov. 14 -- Your "biological age" may say more about your health than the number of years you have lived. While chronological age counts your birthdays, biological age reflects how well your body's systems are functioning - and how long you are likely to live.

With modern epigenetic testing, people can now estimate their biological age at home using a simple saliva sample. The results often reveal how diet, exercise, sleep and habits like smoking or drinking influence the pace of ageing. Experts say the encouraging news is that healthy choices can lower biological age, giving people more control over their long-term wellbeing.

Longevity specialists Dr Sophie Shotter and Nadine Baggott outline five lifestyle habits that can help slow th...