I had also a scientific research that showed Iodine is the best (strongest and without negative side effects) antibiotic known to man. I even shared it on my group, and I can't find it now. But I found that, quite unexpectedly:
Selenium, an antioxidant included in multivitamin tablets thought to have a possible protective effect against the development of type 2 diabetes, may actually increase the risk of developing the disease, an analysis by researchers at the...
www.sott.net
where we can read:
"With selenium, which is a trace element, it may be the case that a little bit is essential, but more can cause detrimental effects, at least in well-nourished populations such as the U.S.
It's possible that taking extra selenium overcomes the natural balance. Perhaps excess selenium has a negative effect on the endocrine system."