I have areas on my eyebrows that are patchy and have not been growing back. I have been wishing they were thicker and fuller. Before bed I have been putting this on my eyelashes only top lid by the directions from inner corner to outer and also my eyebrows where I needed regrowth. I am excited to say in only a weeks time my eyebrows are growing back in with the serum as they do grow faster than my lashes. I am excited to see how it will effect my lashes even though they are thick already. I rate this product 5 out of 5 stars in my own opinion. I received this product discounted. This is my honest and unbiased review.