Without any doubt—The NIA Interventions Testing Program. They have 20 years of experience on effects of dietary interventions supporting longer lifespan.

https://www.nia.nih.gov/research/dab/interventions-testing-p...

Does anybody write articles on the stuff that is released from this org that lay people can understand?

There is Reason who runs a successful biotech company, and his corpus of writing at https://fightaging.org

His commentary on new papers in ageing is pretty good, in my opinion.

He has a good coverage of NIA ITP trials as well: https://duckduckgo.com/?q=site%3Afightaging.org+NIA&ia=web

Dr. Kaeberlein and Dr. Attia.