High-quality eyelash serum sets for lash growth. - Brand: Lashaddict - Product Name: Lashaddict Eyelash Conditioning Serum - Brand: LASHLINK - Product Name: LASHLINK Eyelash Serum Thank you for viewing. Unfortunately, neither suited my constitution. Regarding the Lashlink serum, I was told it was gentler than Lashaddict, but it didn't agree with my skin, so I'm letting it go. I've only used both about twice. I purchased the Lashaddict serum around mid-September of this year, and the Lashlink serum around mid-October of this year. *Both cost around 10,000 yen. Thank you.