Alva Review-Courier -

ROCHESTER, Minn. (AP) — The quest for eternal youth never gets old.

By extension, companies making progress on developing anti-aging treatments always have been very popular with deep-pocketed investors.

The latest focus on making people healthier as they grow old by combating age-related maladies is attracting a lot of attention. Unity Biotechnology, a San Francisco-based biotechnology firm co-founded by Mayo Clinic molecular biologist Dr. Jan van Deursen, is drawing in big investors such as Amazon's Jeff Bezos as the research advances.

Unity, which was founded in 2011, announced it took in a...