Yeah agreed, most of that is absolutely untrue and I've never heard anyone say that before. The K pains are well-known to be because of bladder damage, ketamine and other arylcyclohexamines can cause serious bladder and kidney damage with chronic prolonged use. Some people are more susceptible than others.
Also you should never inhale powder into your lungs, your lungs are supposed to absorb non-solids, whereas your nasal passages absorb solids. Anesket is the name of a pharmaceutical ketamine, it is simply a racemic (has both optical isomers) and pure preparation of ketamine. It's certainly true that K on the street can be cut and adulterated, like any street drug, but I don't think you understand what an isomer is. Some chemicals have chiral centers where the molecule can form in the same structure but basically a mirror image, resulting in 2 isomers (2 possible ways for the same molecule to form). Usually these 2 isomers have different effects. For example, the S isomer of ketamine is lighter and tripper for most people, while R-ketamine is heavier and more anesthesic. Most ketamine is racemic which means it's about a 50/50 blend of the 2 isomers. Any molecule with one or more chiral centers is one of the possible isomers of that molecule.
Lastly, ketamine absolutely does NOT occur naturally or come from the ground. It's a synthetic chemical, in the same family as PCP, MXE, etc. It's usually produced as a hydrochloride salt, but that's just because molecules themselves are freebases unless they're attached to an acid. Attaching them to an acid (like hydrochloric acid, which forms a hydrochloride salt) makes them a "salt", and salts are generally less caustic and more stable. Not sure what state that ketamine freebase exists in, but I know that phenethylamines in freebase form are volatile, caustic liquids, which is why every one of them is converted to a salt because otherwise they'd be dangerous to consume. It's still the same drug though. Mescaline for example is never encountered as a freebase, but usually as the hydrochloride salt. Similarly, you can react a freebase with citric acid to form a citrate salt, or or vitamin C (ascorbic acid) to form an ascorbate salt, or vinegar (acetic acid) to form an acetate salt, and so on with other acids.
I don't know where you got that info, or if you're just fucking with us (come on, you believe that ketamine comes from the ground?), but if you believe what you wrote, you need to educate yourself because almost everything you wrote is either flat wrong or outright harmful. The only thing you got right was that you CAN eat it and it won't damage your nasal passages (or lungs) then. The dose is much higher and it lasts longer orally too.