In metta meditation, we direct loving-kindness toward ourselves and then, in an expanding sequence, toward someone we love. Someone we are neutral toward. Someone we have difficulty with. And finally toward all beings everywhere without discrimination.

In the normal cell cycle, telomeres shorten with the aging process of the body. Therefore, telomere length that is shorter than the average length for a certain age group has been shown to be associated with an increased risk of aging diseases or a reduced lifespan in humans.