The concentration of minoxidil—commonly available in 2% and 5% solutions—affects its efficacy, side effects, and performance. Here’s a comparison of how these two concentrations perform: Efficacy of minoxidil concentration 2% vs 5% 2% Minoxidil: Often recommended for women due to a lower risk of side effects. Studies show it can help slow hair loss and promote regrowth, but the effects …