Every owner who's lived through a product shortage remembers the same sick feeling: the reorder that doesn't come, the patients booked for a treatment you suddenly can't deliver, the scramble to find product at any price or from any source. What almost none of those owners realized at the time is that the shortage didn't appear overnight. It was preceded — often by weeks — by regulatory and quality signals that were essentially public, visible to anyone who knew where to look. By the time a shortage is obvious to everyone, the product is already gone. The advantage belongs entirely to the owners who saw it coming.
This is general education for owners, not regulatory advice. The signals below are indicators to watch, not predictions; interpret them in context.