Plexaderm in the Heat? Here's What Happened

Hey there!

Over the long (and very humid) Memorial Day weekend, I decided to put two popular under-eye serums to the test: Plexaderm and Peter Thomas Roth FirmX.

Both are made to visibly smooth puffiness, dark circles, fine lines, and those crinkly little under-eye wrinkles we all deal with—especially on long, sweaty days.

💦 It was 90 degrees. Sticky and uncomfortable. Definitely not ideal skincare weather.

But honestly? Perfect for testing which one actually holds up under sweat, sunscreen, and a full day outdoors.

My honest takeaway? Both serums held up surprisingly well in the heat and humidity.

Plexaderm felt a little tackier on my skin—almost like it was locking everything in place. Peter Thomas Roth, on the other hand, stayed dry and comfortable as soon as I started to sweat.

Still, both gave me smoother, tighter-looking under-eyes by the end of the day, which honestly surprised me given the conditions.

If you’ve ever wondered which serum performs better in heat, on dry skin, or during high-humidity days, I laid it all out for you right here:

👉 Which Eye Serum Lasts Longer—Plexaderm or Peter Thomas Roth? »

Curious how these stack up against other popular serums? I personally tested 7 top-rated under-eye treatments and shared the full results—before-and-after pics included. If you're dealing with puffiness, lines, or tired-looking eyes, this deep dive might help you find the one that actually works for your skin.

👉 See my honest review of 7 under-eye serums »

Thanks for reading and following along!

Stay cool and hydrated out there—and if you're heading into any summer heat, let me know which skincare products you're putting to the test. ☀️

P.S. Is there a topic you'd love me to cover next? Just hit reply.

Warm wishes, XOXO