In a study of older adults, those who volunteered had higher life satisfaction and will to live, and less depression, anxiety, and somatization.
ɪn ɐ stˈʌdi ʌv ˈoʊldɚɹ ɐdˈʌlts, ðoʊz hˌuː vˌɑːləntˈɪɹd hæd hˈaɪɚ lˈaɪf sˌæɾɪsfˈækʃən ænd wˈɪltə lˈaɪv, ænd lˈɛs dᵻpɹˈɛʃən, æŋzˈaɪəɾi, ænd sˌɑːmɐɾᵻzˈeɪʃən.