If the GI tract is slowed down, it makes that absorption a lot less predictable, which can disrupt the efficacy of birth control, Miller says
They may not claim to diagnose, mitigate, treat, cure, or prevent a specific disease or class (which would make them a drug, hence the second part of the label disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease) but may claim to aid a structure or function of the human body, benefit a classical nutrient disease, or promote general well-being
These symptoms, while typically mild to moderate, can be severe enough to affect daily life
Am J Dis Child 141:10871089