People who eat fewer calories for many years have more of a protein called beclin-1 in their muscles, which helps start the process of cleaning up damaged cell parts.

People who eat fewer calories for many years have more of a protein called LC3 in their muscles, which is involved in the process of cleaning up damaged cell parts.

People who eat fewer calories for many years have more proteins in their muscles that help clean up damaged proteins and cell parts, which may help keep cells healthier.

People who eat fewer calories for many years have more proteins in their muscles that help clean up damaged proteins and cell parts, which might explain why calorie restriction could slow aging.