SMiB Anti-Aging Series - Colour Change Shampoo for Grey Hair

Overall, the coloring experience is quite interesting. The white hairs are turning a little darker, as I have purchased the "Black" color shampoo. Unsure if I need to continue using this shampoo for as long as I want it to be of a darker color. I have my short hair washed twice a day and it has been 3 weeks, it only managed to turn the top part a little darker. Not obvious for the sides. Unsure how long will it take to have the full head to have the colored results.

I hv been using for a few months. I change back to black colour for better coverage and find the hair shampoo is much softer than brown. Its would be ideal if you can come out with small travelling pack for easier packing during our holiday

I really enjoy using this pdt as it helps to save a lot instead of gg to salon to color my hair every 2-3mths. Will definitely repurchase it.