Most inexpensive way to go.
I am redoing my review for this as things have changed.  I complained about it being watery before, but I must not have put quite enough powder in the water to form a gel.  it is definitely a gel now and I am pleased.  I still find I cannot use it with just water or something else wet on my face because it still dries me out if I don't put a moisturizer on top.  But that's okay.  I use it and then after it dries I immediately put on another moisturizer.  I also use it now with my derma roller to get the best results for increasing the collagen and elastin in my skin.  I would never buy a pre-made serum again as it is so much more expensive that way and so easy to make otherwise.  I would recommend this to others.
Rating: 5 stars