Mantras are sound vibrations grouped together & chanted to propitiate planets. By chanting Mantras, not only we pay respect to the corresponding planet but also become one with their energy. The Mantra gets activated by perfusing into that part of your body or the cells that it correlates with, which are ultimately made of the tatva corresponded to that planet. Mantra requires the use of the power of your Mana, meaning mind (Man + tra). It is a relatively safer form of remedy with little or no side effect. We can use Mantra and meditation to ward off negative energy that may be troubling us like an overly strong & malefic Rahu, Mars and Saturn. It may not be advisable to strengthen these planets using gemstone. Propitiation of planets in this case using meditation techniques is better way of remedies.