Can fasting reverse your biological age?
The provided source contains no data on fasting and biological ageing, so this question cannot be answered on the basis of this material. For an honest answer, look for studies that directly link fasting to measurements of biological age.
The only source provided concerns the global disease burden of hundreds of conditions across more than two hundred countries. That source contains no measurements whatsoever of fasting, caloric restriction, or biological ageing.
Based solely on this material, the question of whether fasting can reverse your biological age simply cannot be answered. Data on epigenetic clocks, ageing markers, or fasting studies are entirely absent.
To answer this question fairly, other sources are needed, such as studies linking fasting to measurements of biological age. Those have not been provided here.