>Most definitely not, but then again, Doctors err on the side of caution for obvious reasons

Let me rephrase this slightly: Doctors err on the side of caution in terms of the liability of performing a medical intervention (Such as advising to take a supplement). There are many cases where the advice from an MD minimizes their liability and risk but doesn't optimize health for the most number of people.

It's much harder to sue over a lack of an intervention than it is to sue over an intervention that produced a negative outcome. Both happen for sure, but there's a systemic bias in the process. In general, this is probably a good thing, but it's nuanced.