Conservative judges revive case on FDA’s “you are not a horse” ivermectin posts

You are still not a horse, but FDA will go to court over its authority to advise you.

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[UweHalfHand]

Off topic:

I still have no idea how stereoisomers and enantiomers work. A little light digging (ahem google page 1) suggests a reversal in optical polarity but I still don't understand why they behave chemically differently. I can cram my left hand in a right hand glove (for some gloves, anyway), although it is not pleasant. I guess I don't get how (made up example, I have no idea what I'm talking about) a Cl coming off the left of a C means toxin but the right means sedative. They're still sharing the same bonds, yeah? Is it really about the physicality of the molecule?

...I wonder if Veritasium has something on this, though he's usually physics.

I am not a biochemist, so I can’t tell you all the fussy (and very important) details, but basically it comes down to the shape of the molecule in relation to all the other molecules that make up you me and all life. It’s not the absolute orientation, you could have (I believe) a mirror world where all of the chiral molecules in all of our bodies were reversed, and in that mirror world it would be the other isomer that would be toxic. (This ignores possible extremely subtle left/right asymmetries in elementary particle physics, but I doubt that such asymmetries would propagate upward to the relatively huge and slow level of molecules — but I’m also not a particle physicist; I could be wrong.)