She found that people who had positive ideas about their own ageing (who agreed with comments such as "I have as much pep as last year" and who disagreed that as you get older you get less useful) lived for an average of 22.6 years after they first participated in the study, while the people who felt less positively about ageing lived for just 15 years more on average.

In this study, it didn't matter as much what people thought about the physical implications of ageing, what mattered was whether they believed they would still develop and grow mentally.  

https://www.bbc.com/future/article/20220719-can-you-delay-ageing-by-refusing-to-act-your-age

Your Hands as You Age - https://www.webmd.com/healthy-aging/ss/slideshow-your-hands

In an eight-week clinical trial conducted with adults between 50 and 72 years, researchers determined that biological age could be reversed over three years by using a treatment that included diet (low glycemic fruits, eggs, and liver), at least seven hours of sleep a night, exercise (30 minutes a day for five days a week), meditation and breathing exercises, and supplemental probiotics and nutrients. Cumin, turmeric, green tea, and mushrooms were also included in the recommended diet. The trial was conducted by Kara Fitzgerald, author of Younger You: Reduce Your Bio Age and Live Longer, Better, and her team. - https://www.zmescience.com/science/science-aging-epigenetics/
