If you’re trying to ping someone you need to put their handle in the “to:” line, as above, not in the body of the post.
I thank you for the pings on this, and it’s a concern, but I really try to keep the Take Charge Of Your Health ping list for things that are modifiable to make one’s health better, and the removal off Amazon will still leave some other outlets able to sell it.
However, the FDA is cracking down and may ban it everywhere, soon.