A lot of the fiber they are putting in foods so they can call them high fiber don’t have the positive health benefits generally associated with fiber. e.g. I researched Benefiber years ago and the studies I found at the time indicated it had none of the benefits to heart health or colon health. But it dissolves basically into nothing while still technically being fiber.

Lots of people = almost all people in the USA, according to research I’ve seen. I’m not sure of exact numbers, but I recall it being somewhere close to 95% of people being deficient to some degree, with the majority of that group being quite deficient.

Wild that people can't just cook and eat more vegetables.