The present invention relates to hair treatment compositions. In particular, the invention relates to hair treatment compositions that stimulate hair growth. Various compounds and combinations thereof have been reported for use in the treatment of hair to stimulate growth. Although the hair treatment compositions in the prior art provides for hair growth, there is unmet need for improved and superior compositions. It is therefore an object of the present invention to provide an improved and superior composition for stimulating hair growth. Disclosed is a hair treatment composition comprising (i) a polymorph of calcium carbonate; (ii) a water-soluble compound of calcium; and (iii) a suitable carrier. wherein said polymorph is at least one of calcite, vaterite or aragonite and wherein particle size of said polymorph is 1 μm to 10 μm.