Name the active ingredient, not just the brand. It makes these threads searchable years later.

Worth repeating that this is not medical advice and the answer often depends on who you are.

This is the kind of post the forum exists for.

Personal experience, labelled as such, is exactly right here. Nobody is prescribing.

Is a baseline blood test really necessary before starting something like this?

Same here.

Personal experience, labelled as such, is exactly right here. Nobody is prescribing.

Domain age is one of the few signals that is expensive to fake and free to check.