I was a little nervous at first about making my own Hyralaunic Serum but WOW what a difference it has made in my skin appearance. This really does penetrate much further into your skin which makes a huge difference. Each batch is only good for a week at a time and I've perfected how to make just enough for the week. I use Rose Water to make it and store it on the refrigerator. I've had it for a while now and have barely put a dent in the bag since each batch only takes a very small amount of powder. I'm 37 and I swear I look 10 years younger since using this product. I more than recommend and will definitely be repurchasing myself when I finally run out!