The zeta potential is a measure of the electrostatic repulsion between particles in a colloidal system. It is an important parameter in determining the stability of colloidal particles, as it influences the degree of repulsion between particles and their tendency to aggregate. A higher magnitude of zeta potential indicates a more stable colloidal system, while a lower magnitude suggests a less stable system that is more prone to aggregation and sedimentation.Experimental evidence supporting the relationship between the magnitude of the zeta potential and the stability of colloidal particles can be found in various studies. For example, a study by Honary and Zahir 2013 investigated the effect of zeta potential on the stability of a colloidal system containing diclofenac sodium nanoparticles. They found that as the zeta potential increased in magnitude either positive or negative , the stability of the colloidal system also increased, with less aggregation and sedimentation observed.Another study by Kostoglou et al. 2014 examined the relationship between zeta potential and stability in a colloidal system of silver nanoparticles. They observed that a higher magnitude of zeta potential led to a more stable colloidal system, with a decreased tendency for the silver nanoparticles to aggregate.Furthermore, a study by Sanguansri and Augustin 2006 investigated the effect of zeta potential on the stability of oil-in-water emulsions stabilized by whey protein isolate. They found that emulsions with a higher magnitude of zeta potential exhibited greater stability, as the electrostatic repulsion between the droplets prevented aggregation and coalescence.In summary, experimental evidence supports the relationship between the magnitude of the zeta potential and the stability of colloidal particles. A higher magnitude of zeta potential leads to increased electrostatic repulsion between particles, resulting in a more stable colloidal system with a reduced tendency for aggregation and sedimentation.