Thingtesting Logo

K18

4.5 • 47 Reviews

K18 sells peptide hair care products to reverse hair damage.

k18hair.comArrow up right
Shop
Reward
15% reward
K18 Reviews

4.5

K18 earns largely positive reviews as a reparative haircare brand that noticeably reduces frizz, boosts shine, and strengthens damaged, color‑treated, and fine hair, though results vary and some users see minimal improvement. Reviewers praise the Leave‑In Molecular Repair Hair Mask, lightweight Hair Oil, and innovative AirWash dry shampoo, while noting occasional heaviness or clumping if overapplied, harshness from shampoos on sensitive scalps, starchy/gritty AirWash residue with limited longevity, and inconsistency between sample and full-size performance.

AI summary based on Thingtesting reviews

Photos

Rewards
Shop
Review
Reward
15% reward

Join to earn a 15% reward

Join Thingtesting to earn a cash-based commission when you shop and review K18 using our link.

By continuing, you agree to Thingtesting’s Terms of Service, Community Guidelines, and the use of data in the Privacy Policy

Articles

Reviews and Posts

View all 47

  • 24d ago

    K18 Damage Shield Protective Conditioner leaves my hair feeling soft, smooth, and hydrated without weighing it down. I love that it helps protect against everyday damage while making my hair easier to detangle and manage. It pairs well with the K18 shampoo and is a great addition to a healthy hair care routine!

  • 24d ago

    K18 Peptide Prep Detox Shampoo is great for giving my hair a deep clean and removing buildup without leaving it feeling overly dry. It leaves my scalp feeling refreshed and my hair feeling lighter and cleaner. Perfect for a reset between washes, especially if you use styling products regularly!

  • 24d ago

    K18 Damage Shield Shampoo leaves my hair feeling clean, soft, and refreshed without stripping away moisture. I love that it helps protect against everyday damage while keeping my hair manageable and smooth. It lathers well, feels gentle, and pairs perfectly with other K18 products for healthier-looking hair!

  • 24d ago

    K18 Leave-In Molecular Repair Hair Mask is worth the hype! It leaves my hair feeling softer, smoother, and healthier without weighing it down. I love that it helps repair damage while reducing frizz and improving manageability. A little goes a long way, making it a great addition to my hair care routine!

View all 47 reviews

What is K18?

K18 sells peptide hair care products to reverse hair damage.