Is Forgiveness good for mood & stress?

The evidence points that way, though it's not yet conclusive. Forgiveness — of others or of oneself — shows a consistent but modest correlation with physical health across a large observational literature, alongside some evidence of a plausible cardiovascular mechanism. That's reflected in an evidence score of 40/100 for its role in mood & stress, drawn from 5 studies, with an estimated impact on longevity rated limited (22/100).