Azelaic acid is a natural substance that prevents some types of hair loss. It has been said that combining 15% of this product with the 5% minoxidil solution (widely available on the retail market such as Costco) can increase the effectiveness of the overall treatment process. You can make this solution yourself and save a lot of $$$. To make such a solution, you can measure ~10 grams of azelaic acid for each 60 mL (2 floz) minoxidil solution. Add a small amount of minoxidil solution into the powder and mix it into a uniform paste. Pour more solution into this paste and keep mixing until all solution has been added. You will end up with a well mixed final product. Shake well before each application.