After trying this lash and brow serum faithfully 2x a day for 3 weeks, I can honestly say I saw very little change in my lashes and no change in my brows except for a few fine hairs. I had only disappointing results.
I know products like this take time, consistency, and patience, but I was hoping to see more noticeable results with this product.
Therefore, if you want to see any visible results, I would think you'd need to purchase and use the product consistently for a couple of months, if not longer.