Its wild this research is even being attempted, its borderline unethical to experiment on otherwise healthy people.

I fully don't expect immune system driven aging to be understood until the Thymus better understood. DNA reproduction and telomere related aging will not be addressable until cell to cell signaling is finally mapped, and methylation activation/deactivation can be targeted.

Most likely some kind of cloned brain tissue can help reduce age-related cognitive decline and some diseases. Imo we'd get far more out of targeting specific diseases than going after aging.