It is an interesting question the issue of just how much one should listen to Dr's and the medical 'experts'... It sometimes takes an effort not to reflexively follow the old mantra of 'Do whatever the Dr says', yet at the same time most of us are here on this website doing the LC thing DESPITE all the medical experts advising us to eat a low fat, high carb diet, w/ minimal amounts of meat, etc.
I know that I personally, after years of study and resarch have reached the conclusion that the leading cause of illnes and death is life!
not
I tend to believe what the MD's say and go to them for 'break - fix' type problems, such as broken bones, heavy bleeding, and other assorted trauma. They do pretty well with that. Illness of the 'disease' variety, they sometimes can help with, but usually it seems like if you go to the Dr, you feel better in seven days; if you don't it will take a week...
I read a rather barbed paper once that pointed out how in many ways the modern medical profession has a position in society and law not unlike that of religion in ancient days - those who question the standard advice are treated as heretics, if they act against it, and especially if they assist others in acting against it, they risk being persecuted (er, prosecuted) by the governmental authorities. But if one dares to look behind the curtain, their results aren't all that great, and often the 'cures' are as bad as the disease.
In terms of whether something has been 'proven safe' or not, again there is considerable debate. What defines 'Proven Safe'??? How many studies of what sort does it take to 'prove' _ is safe??? This is a negative proof, a question that philosphically falls in the same category as the existence of UFO's outside the pages of the Weekly World News.
I can point out in endless detail how little proof there is, and even if all the evidence is accepted, it won't prevent one from landing on the White House lawn tomorrow and doing something unspeakable to the President (one can always hope!)
Likewise, no matter what the issue, one can't say that something is 'proven safe' no matter how many studies have been done on it, because the next study to come along might prove that it isn't.
A 'positive proof' is far easier, because all it requires is evidence that something DOES exist. A UFO is proved to exist by coming up with one, a substance is shown harmful by producing evidence of the harm and a definite causal link.
This is why you may have noticed I tend to ask for evidence on assertions such as Badger Girl's latest mention that one should avoid artificial sweeteners when PG because 'they haven't been proved safe'. I would assert that they CAN'T be proven safe, because there is always a possibility that they could be proven harmful under some circumstance. OTOH, I think that if after some reasonable but fairly short period of time (a great deal depends on how many people are using the stuff) there is no evidence of harm, then they should be presumed safe.
In the case of the PG question, the harm would have to be either defective kids or incomplete pregnancies, and their numbers would have to be significantly higher than the ones for people who were NOT using the fake sweeteners. AFAIK, all of the stuff on the market in the US currently has been around for years, and has not had this sort of evidence shown for it.
Gooserider