According to board-certified dermatologist Blair Murphy-Rose, key ingredients in some lash serums, prostaglandins, or PGAs, are still mysterious. Hilal-Campo recommends avoiding PGAs entirely, which have been in the collective conversation lately (not to mention TikTok feeds) for their side effects—they often have powerful results—but with a risk.

A) Indeed, MD Lash Factor Eyelash Conditioner has been known to work wonders on even the most stubborn of lashes. But after a few weeks using this three times a week, the hair has become quite soft, and there’s some new growth and thickness.These ingredients strengthen the hair, repair damage and stimulate more collagen production at the hair follicle root, which “translates into lash hair growth. If you just know you can’t be held accountable to brush on an eyelash serum twice a day for six months, choose a serum that’s easier to incorporate consistently, like an eyelash-serum primer, a lash-conditioning mascara with moisturizing peptides, or one that’s already mixed into your eye serum at night.

But keep in mind: It’s pretty strong, so make sure to discuss the potential risks—like eye irritation, eye-color change, and eyelid-darkening—with your doctor beforehand, says ophthalmologist, Nicky Shah, MD. Q) Can I use MD Lash Factor Eyelash Conditioner in combination with my favorite mascara, or will it cause a lash explosion? I knew it might be touch and go for the wedding but they are absolutely fabulous and a hundred times better than falsies.

It helps rebuild the bonds in my lashes to make them stronger and less prone to hair fall, which inevitably makes them look thicker over time. It won’t make your lashes or brows necessarily longer, but it’s hella moisturizing and soothing, thanks to its aloe vera and cannabis-seed extract (which is a great anti-inflammatory, btw). Hyaluronic Acid (Sodium Hyaluronate): helps condition and protect to minimize breakage and bring hydration to dry, brittle lashes.