DECIDE YOUR HAIR TYPE. THEN PURCHASE A PRODUCT FOR YOUR HAIR TYPE. PROFESSIONAL HAIR PRODUCTS ARE CONCENTRATED AND NOT WATERED DOWN. YOU NEED THE SIZE OF A QUARTER TO DO YOUR HAIR. THERE IS NO NEED TO WASTE IT. YOU SAVE A LOT OF MONEY BECAUSE IT LASTS A LONG TIME. IT MIGHT COST A LITTLE MORE BUT IN THE END IT SAVES YOU MONEY. THERE IS NO ADDITIVES ADDED TO IT LIKE THE STORE BRANDS SO THEY CAN KEEP IT ON THE SHELF LONGER.  ADDITIVES ARE HARSH ON YOUR HAIR.