There is a lack of reliable evidence to prove that all items sold by Douyin Live AE are authentic.

1. First, many brands of items sold on Douyin Live AE are little-known and may have quality and popularity issues, while some other brands may also be difficult to distinguish between true and false.

2. Secondly, the lack of universal evaluation standards and third-party regulatory agencies makes it difficult to determine whether the items sold by Douyin Live AE are authentic.

3. In general, it is difficult to guarantee that all items sold by Douyin Live AE are authentic, and consumers need to conduct as much investigation and identification as possible before purchasing.