Researchers look for signs or clues to help us understand how our bodies age. Scientists call these signs "biomarkers" which can be defined as measurable indicators of some biological state or condition. They are often used in medical research and practice to assess a patient's health status or response to interventions.

The approval of promising anti-aging drugs often face significant hurdles. Lengthy and complex process of regulatory approvals often stagnate a brilliant development for many years before it comes to market. However, there are strategies that can potentially accelerate these processes and bring life-extending drugs to the public much faster.