If you are even remotely interested in Hair care, you've probably heard of K18. The brand's Leave-In Molecular Repair Hair Mask has amassed a cult-like following after going viral on TikTok multiple times, and massively popular influencers like Alix Earle are fans. Practically everyone who has tried it out says it's worked wonders on their hair, taking it from dry and damaged to soft and shiny.

"The secret is in the patented K18 peptide - born after 10 years of complex bioscience research - which is the perfect molecular puzzle piece to reconnect damage sites, restoring strength and elasticity," Suveen Sahib, co-founder of K18, tells POPSUGAR. Apparently, while some products condition the hair just by coating it, K18 products work at a deeper level to molecularly repair hair.

At first, the claims sounded too good to be true, and I was on the fence about testing the products out. But after months of watching my favorite influencers, coworkers, and even friends rave about the brand's products, I knew I needed to try them for myself. K18 currently has four different products on the market: their viral hair mask, a detox shampoo, a daily shampoo, and most recently, a hair oil.

I tested all of them, so keep reading to find out which products earned a coveted five-star rating.