It says it's never been tested on humans and the proper diligence should follow,
But given that we already eat large amounts of it with no harmful side effects, the expectations are good.
But given that we already eat large amounts of it with no harmful side effects, the expectations are good.
[1] Note that they get skin that is transparent only to one shade of red, it's not transparent to all the visible spectrum.
The effect of a substance is usually three orders of magnitude lower when you rub it on your skin vs. when you swallow it.
Going out on a limb and guessing you're at an effective dose for something when it's making your skin transparent.
(2) assume it isn't absorbed into the larger body. Still the tissue absorbing it got a YUUUUGEEE dose. Then presumably most of it is washed out minutes later. So under that assumption we worry about localized tissue damage ---- --- which, if we're talking about things like cancer patients here who commonly get zapped with X-rays and gamma rays and antimatter and such, is perhaps not out of the ordinary. If there's no systematic damage the main concern would be cancer. If the skin dies, it can be fixed. And heck, a lot of cancer treatments also cause cancer i.e. many children with blood cancers go onto later get other cancers due to the medicinal cure of their blood cancer side effect.