The purpose of this research is to discuss the impact of radially varying viscosity on MHD peristaltic transport in a micropolar Newtonian nanofluid. The fluid moves through a porous media under the influence of ohmic dissipation and radiation. The mathematical equations governing the system were modified with long-wavelength and low-Reynolds number approximations. They were then solved using the homotopy perturbation method. A set of graphs illustrate numerical results regarding the relationships between axial velocity, micro-rotation velocity, temperature and nanoparticle concentration with physical variables. It is observed that both the micro-rotation velocity and temperature magnify with an increase in the value of Eckert number. Meanwhile, the value of the axial velocity reduces with an increase in the value of Eckert number. Furthermore, the current study has many applications in several scientific areas such as the medical industry, medicine and others. Gold nanoparticles can also be used to treat cancerous tumours.