Will magnesium supplements help you relax?

Results will vary wildly by the individual and how deficient in magnesium and other elements they are in addition to the root causes of their stressors such as hormone imbalances and specifically Cortisol levels and root causes for these levels.

There are things that induce relaxation but the affects of those will also vary wildly and come with some minor risks such as Kava, Valerian root, Ashwagandha, Passionflower, CBD, and L-Theanine but all of those can have paradoxical effects depending on the person. It is quite literally impossible to generalize. People must study themselves and experiment if they are not risk averse.