Lash Boost.

"Lash Boost is a serum that claims to give you longer looking lashes in four weeks. The lawsuits are basically based on the accusation that Lash Boost contained an ingredient called isopropyl cloprostinate, which poses potentially really harmful risks, that the brand failed to adequately disclose. The plaintiffs argue that the ingredient functions like a drug, working very similarly to prescription lash growth serums, and therefore needs to meet the appropriate FDA regulations, which they say it currently does not. Rodan+Fields was deceptive in its marketing of the product, saying it was a cosmetic, and that the company failed to adequately warn consumers of the potential side effects such as eye irritation, eyelid drooping, and even potentially changing the colors of your iris."