Dr. Ai is a brand owned by Freda, which belongs to domestic brands, so the products are reliable and guaranteed. Generally speaking, there will be no fakes, but if the friends who buy them are worried about authenticity, they can use the above method to identify them.
Dr. Ai's ingredients are relatively safe, and Freda, as the largest hyaluronic acid group, has also cooperated with many international brands, so Dr. Ai's products are not bad and can be used by people of any skin type. Because Dr. Ai's price is not expensive, I suggest you buy it in official website, which can dispel your doubts about buying fake goods from the source.