It is impossible to make it safely for (self)-medical uses. And by the way: DCA means DiChloroAcetic acid which is neither a chloride (salt of eg. sodium, not of 'di') nor an acetate (salt of acetic acid) but the an acid itself (CHCl2COOH).
The problem with producing this acid compound is you need Chlorine (Cl2) gas which is a very toxic and dangerous chemical.
It's not good for human consumption.
In reality human meat is fit for human consumption. Pretty much any animal (unless poisonous) Is fit for human consumption, so yes, bull shark is fit too.
Cannabalism
No, the herbs used in the Warrior Cats series are fictional and not safe for human consumption. It's always best to consult a healthcare professional for any health concerns or medicine needs.
what are the factors that determine when a substance is toxic and unfit for human consumption
Dermatology is the field of medicine concerned with human skin.
Human Consumption = Waste
What humans can eat
no
No.
Zombies thoroughly enjoy the consumption of human brains and flesh.
The consumption of your own kind. Like a human eatting another human.