This book consists of seven chapters that study the useful effects of static magnetic fields. The first chapter focuses on microscopic effects of uniform magnetic fields on simple organic systems like proteins, polymers, and cells where the aim of the study was to show (both experimentally and theoretically) the “strength” of static magnetic fields which that can overcome angular momentum from molecular thermal agitation of macromolecules. The second chapter deepens the discussion by explaining a very important effect of static magnetic fields on cells concerning the activation of voltage-gated calcium and sodium channels induced by static magnetic fields. In the third chapter, effects of uniform magnetic fields on typical cells are also discussed. Possible beneficial effects of static magnetic fields were also highlighted in the fourth chapter in which spectroscopic observations of the response to static magnetic fields of Tau and Creb proteins in brain can be used to detect degenerative diseases and study the memory mechanism. In the fifth chapter, the response to static magnetic fields of chromosomal mechanism in the mitoses of some plant roots was shown. In the sixth chapter, a theoretical discussion on the effects of a uniform magnetic field on two-phase dielectric flows of fluids and the dynamics of bubbles under an applied uniform magnetic field was shown. Finally, further beneficial effect of static magnetic fields was discussed in the seventh chapter.