The claims of the traditional texts and teachers of Buddhist meditation include the enhancement of mental health. Twenty five meditators sitting a ten day retreat in Vipassana and Metta meditation were measured on a compassion scale and an androgyny index. The androgyny index was used to measure mental health. Compassion scores for all meditators increased slightly after the retreat. Experienced meditators had significantly higher scores than inexperienced meditators. Regardless of previous experience, meditators with high compassion scores significantly increased in androgyny after the retreat. The traditional claims for the enhancement of mental health are therefore supported by these results.