Mandalas can also be used as a healing tool for meditation. Meditation itself has been shown to reduce stress, combat depression, reduce pain, and lower blood pressure.It may also boost the immune system and stimulate the release of melatonin, a hormone believed to slow cell aging and promote sleep. While it is unclear what impact visual mandalas may have, people may find that they are a useful tool for their meditative practice.Mandalas are not just something to look at or meditate on. There are now mandala coloring books that can be useful to anyone. Coloring a mandala using pencil crayons, crayons, paint, or pastels combines the benefits of meditation and art therapy into a simple practice that can be done at any time and place.