• K18 offers science-backed innovations that are clinically proven to work
• Known for their celebrity-loved Leave-In Molecular Repair Hair Mask, K18 recently launched 2 new shampoos
• I tried all three K18 products to see if they could really transform my damaged hair

In the haircare space, new products come and go so quickly. It can be tough to know what really works, so I was afraid to try something new. But, my damaged hair was in desperate need of some help, so I looked to what my hair inspirations use in their routines.

That’s when I noticed Selena Gomez was raving about K18’s Leave-In Molecular Repair Hair Mask, saying that “Incorporating the K18 hair mask into my morning beauty routine made me feel like a grown woman.” Who doesn’t want healthy, bouncy hair—and to feel like a grown woman? So, I immediately added this mask to my cart.

Before I checked out, I noticed that K18 just launched two new PEPTIDE PREP™ shampoos made to deliver a superior clean, without compromise. We all deserve the best clean, so I dropped those into my cart too.

Here’s my $149 K18 haul of the Leave-In Molecular Repair Hair Mask, the PEPTIDE PREP™ pH Maintenance Shampoo, and the PEPTIDE PREP™ detox shampoo:

The first product is K18’s PEPTIDE PREP™ Detox Shampoo.

I didn’t realize how much buildup was weighing down my hair until this shampoo removed it all. K18’s color-safe detox shampoo is clinically proven to remove 99% product buildup, 95% sebum + 76% copper after just one wash. This non-stripping + pH-optimized cleanse is powered by active skincare-inspired ingredients like activated charcoal and salicylic acid, so it wasn’t drying out my hair or scalp.

After my first wash, my hair felt super soft and bouncy even without a blowout! Best part, this detox shampoo is engineered to improve the efficacy of the K18 mask—making this the perfect prep step for maximum damage repair.

I’ve been switching out my everyday cleanse with this detox once a week, so this $38 bottle will last me a while. For the rest of my hair wash days, K18 has that handled too.

Next up, the PEPTIDE PREP™ pH Maintenance Shampoo.

Most shampoos I’ve used have harsh ingredients that wear hair down, but K18’s smoothing maintenance shampoo is nothing like that. Powered by plant-derived surfactants, this optimized cleanse delivers high foaming + cleansing power without being harsh or leaving stuff behind. This certified microbiome-friendly formula won’t disrupt your scalp’s natural protective barrier, which is great for my sensitive scalp.

Designed with an optimized pH, it helps protect your color + the natural moisture in your hair, leaving it deliciously smooth. I’m constantly running my fingers through my waves, even without my usual detanglers.

It’s safe to use every day if you want and costs $36.

Lastly, the TikTok viral Leave-In Molecular Repair Hair Mask.

With my clean hair base, it was time to finally repair all my hair damage. This easy leave-in reverses hair damage from bleach + color, chemical services, and heat in just 4 minutes. You don’t have to second guess if this mask works for you, the patented K18PEPTIDE™ mimics the natural structure of hair keratin to reconnect damage sites on the molecular level (where all hair is the same). The results? Renewed strength + elasticity on all hair types.

After using the PEPTIDE PREP™ detox shampoo to remove all that buildup, I skipped conditioner and used 1 pump of the K18 mask on towel-dried damp hair. After 4 minutes, you’re good to style as usual. No rinsing needed, it’s really that easy!

For such a low-effort treatment, I’m pleasantly surprised that my stronger, softer, smoother, bouncier hair will last AND get better with continued use. No more switching out my stagnating haircare routine, K18 has the key to my hair happiness.

Since the formula is highly concentrated, a little goes a long way. A full-sized bottle delivers up to 50 uses for $75.

I’m sold on K18 and their entire lineup.