Ardell Brow & Lash Growth Accelerator has made my eyelashes thicker and longer. I haven't tried it on my eyebrows since they aren't thin. I don't know if it's oil-free, but I can't smell any fragrance. It's a gel in a mascara-type tube that you brush onto your lashes and brows with a mascara-type brush. My problem has been that I've had fewer lashes on one eye ever since I had eye surgery on it when I was a teenager. Now both my eyes look equal in lash quantity. I used to lose quite a few lashes while removing mascara but now I lose very few. That alone makes me believe this product has made my lashes healthier. I'm needing to use fewer swipes of mascara to achieve the desired look. I had to stop using it on my lower lashes because they were growing long enough for me to feel them on the skin under my eye and that bothered me! I'm only applying this to my clean lashes at night about 3 times per week now. At first I was using it every night and I could see results after a couple of weeks. It stings if you get it in your eyes so applying it carefully is a good idea. However even when I apply a generous amount on my lashes it doesn't go into my eyes when I blink, since it is a gel. I would recommend this product to anyone who wants to thicken up their lashes or brows!