Really works!

I noticed a big difference in th condition of of hair, softer and smoother, after using it once a week for a month

Originally posted on sephora.com

Will BREAK off fine hair - use with caution

Do NOT use this product if you have thin bleached hair. I have noticed my hair get progressively weaker in the last year and now realize it is due to the K18 line and packing too much protein into my thin strands. It made my hair feel so strong and soft after first using but then tripled the amount of hair falling out in the shower. I don’t normally write reviews but I saw so many others people writing about this on reddit that I wanted to make sure I put my review on here - it broke so much of my hair off and slowly weakened my hair do NOT use if you have fine hair you will thank me later!!!

Originally posted on sephora.com