There is no single mudra that balances all three doshas (vata, pitta, and kapha) universally. However, some mudras are believed to have a balancing effect on specific doshas.
For instance, Prithvi Mudra is often associated with grounding and stability, which can help balance vata. Varuna Mudra promotes hydration and cooling, potentially balancing pitta. And Shunya Mudra is said to aid in releasing excess energy, potentially balancing kapha.
Ultimately, the most effective mudra for balancing doshas depends on the individual's unique constitution and imbalances. It's best to consult with a qualified Ayurvedic practitioner for personalized recommendations.