# Source note — Yamanaka factors, partial reprogramming and longevity claims

## Social/video lead
- Facebook URL resolved to: https://www.facebook.com/reel/1036768335399664
- Public title: “We Almost Have the Tech to Live Forever | Chris Williamson”
- Search result also identifies repost/title variant as “We Almost Have the Tech to Live Forever - David Friedberg.”
- Captured files: metadata JSON, MP4, thumbnail and machine transcript in the local research folder.

## Core claim checked
The video says age reversal may arrive soon through Yamanaka factors / partial epigenetic reprogramming: resetting gene-expression markers without turning cells all the way back into stem cells. It says animal/cell work is promising, eye/retina applications are already in clinical trials, and companies such as Altos Labs are heavily funded.

## Evidence labels
- **Strongly established:** mature cells can be reprogrammed to pluripotency; Yamanaka’s OSKM factors launched induced pluripotent stem-cell biology; epigenetic clocks correlate with age; aging biology is a serious research field.
- **Promising but early:** partial reprogramming can rejuvenate some cellular/animal markers in laboratory models; eye/optic-nerve applications are an important first clinical lane.
- **Clinical-stage but unproven:** Life Biosciences says ER-100 is in Phase I clinical trials for optic neuropathies. Phase I primarily tests safety/tolerability, not “live forever.”
- **Unsupported leap:** “live forever,” indefinite lifespan extension, drink/shot/pill cocktails that reset the whole body, and reversing cancer/diabetes/heart disease broadly are not established medicine.

## Sources used
- Nobel Prize 2012 press release: https://www.nobelprize.org/prizes/medicine/2012/press-release/
- Takahashi & Yamanaka, Cell 2006: https://pubmed.ncbi.nlm.nih.gov/16904174/ DOI 10.1016/j.cell.2006.07.024
- Takahashi et al., Cell 2007 human iPSCs: DOI 10.1016/j.cell.2007.11.019
- Ocampo et al., Cell 2016 partial reprogramming: https://pubmed.ncbi.nlm.nih.gov/27984723/ DOI 10.1016/j.cell.2016.11.052
- Lu et al., Nature 2020 optic nerve/vision restoration: https://pubmed.ncbi.nlm.nih.gov/33268865/ DOI 10.1038/s41586-020-2975-4
- Steve Horvath, Genome Biology 2013: https://genomebiology.biomedcentral.com/articles/10.1186/gb-2013-14-10-r115
- Gill et al., eLife 2022 transient reprogramming: https://elifesciences.org/articles/71624
- Yang et al., Aging 2023 chemical reprogramming: https://pubmed.ncbi.nlm.nih.gov/37437248/
- López-Otín et al., Hallmarks of aging 2013/2023 PubMed pages.
- Nature Communications 2024 review: https://www.nature.com/articles/s41467-024-46020-5
- Company pages checked: Altos Labs, Life Biosciences, NewLimit, Retro Biosciences, Rejuvenate Bio, Calico, Turn Bio, Unity Biotechnology, Juvenescence/JuvLabs, SENS/Lifespan Research Institute.