Supplements are a scam. They don't "work" OR barely add little if anything of what they claim.
Richard Feynman, famously stated, "Science is the belief in the ignorance of experts." Scientific knowledge is always provisional and subject to revision based on new evidence and insights.
Scientific theories and hypotheses are not considered absolute or infallible truths, but rather working models that provide the best explanation of the available evidence at a given time. As new evidence emerges, scientists may revise or even abandon their previous theories to account for the new observations.