Purchased in November 2025. Bought new directly from Little Scientist. There are no scratches or stains, but I selected "Used, with some scratches or stains" to indicate that it has been used. Remaining amount: 408g (including the container) I used a small amount once to test it, so it's almost full. I am unable to use it now because my scalp is sensitive, so I am selling it. This product repairs and increases hydrophobicity by creating S-S bonds for frizzy and damaged hair.