Probably the least understood, and the most complex of the rejuvenating sciences, tantra deals with the control of energy within the body, through a process of concentration. Since tantra calls for the exercise and disciplining the mind, and intense periods of concentration, it is sometimes believed to have magical, even evil, connotations. However, this science calls for long periods of learning and meditation, and has few proponents.

Tantric energy is not just self-healing; its powers are believed to be beneficial for others who can be healed by a tantric yogi.