The tooth powder arrived on time. I started using it on January 8th and used it for 11 days. My teeth felt less sensitive when eating. I found that gently rubbing my teeth with it about ten minutes after meals, holding it in my mouth for a while, rinsing with water, and then waiting a longer interval before eating afterward helped. I used it two to three times a day. Although it was a bit pricey, it was worth it. I'm grateful that my country has such a product, making it available to people abroad. Before buying it, I was worried about getting a fake product, but after using it immediately, I confirmed it was a good product. I'm grateful to the Weee platform for ensuring quality for customers, giving us peace of mind. I'm also grateful to the merchant for selecting the right product! Customers are discerning; if they've been fooled once, they won't come back!