the present disclosure relates to compositions containing certain pyrimidine compounds such as minoxidil and / or certain pyrimidine sulfate compounds such as minoxidil sulfate and especially compositions containing pyrimidine compounds in combination with an admixtures comprising at least one antioxidant , at least one organic acid and a select fatty acid mixture . the present disclosure also relates to use of the compositions to grow and / or regrow hair and / or prevent hair loss in mammals and particularly in humans .