Even if a doctor tells you to use it (and doctors aren't immune to quackery) there is still a problem, you have no idea if the bottle of Vitamin D actually contains Vitamin D or just sawdust, or worse.
This was actually the case here, the bottle of "herbal Viagria" was actually just Viagria. Weight loss/bodybuilding supplements are also known to contain prescription stimulants.
You also can't know if the dosage is what it says on the label. Frontline showed an example where the Vitamin D content of a pill was double the stated dosage on the label.
Even if a doctor tells you to use it (and doctors aren't immune to quackery) there is still a problem, you have no idea if the bottle of Vitamin D actually contains Vitamin D or just sawdust, or worse.
This was actually the case here, the bottle of "herbal Viagria" was actually just Viagria. Weight loss/bodybuilding supplements are also known to contain prescription stimulants.
You also can't know if the dosage is what it says on the label. Frontline showed an example where the Vitamin D content of a pill was double the stated dosage on the label.