Mindfulness meditation (the kind favored by the Dalai Lama) increases the activity of telomerase and lengthens telomeres.
Meditation has become the new miracle drug. If I were not a meditator for the last 45 years, I’d find these claims questionable. However, as a caregiver for a spouse with Parkinson’s for over 28 years, I found meditation bring me to a tranquil place no matter how dire the circumstances (and there were many, many dire circumstances).