Well, i'm not saying that their info isn't right. If they synthesize LSD and the result is a product that contains 45% LSD, 45% lysergic acid and 10%of other chemicals needed to produce LSD, and it is hard to separate the actual product from the impurities, i can see why it would be difficult for them to be able to specify exactly how much LSD there is in the endproduct, and that they would just call their entire endproduct including the impurities LSD.

Personally I think most if not all of the differences are related to set/setting/expectations, and dosage. I was today in a lab that analyzes different substances for harm reduction and there was never any LSD sample with significant amount of active impurities, it was always lsd, in different quantities (or the few exceptions of blotters that were DOx, but overal majority were LSD.. This in europe, no idea if USA there are more RC sold as LSD)

We need more analysis coupled with blind tests, I've had enough of "acid Y or X causes dark trips/back aches" speculation

You could test this for yourself by taking a substance that would have a slight vasolidating or broncholidating effect, but no other noticeable effects, like low quantity's of caffeine, theobromine or gingko and you'll see that you will have a better quality experience. Being in a pleasantly warm environment has the same effect.

I've noticed that eating fresh fruit or drinking fresh juice, will immediately enhance visuals dramatically. Especially colours become warmer and brighter.
To me this suggests that if braincells are being even slightly depleted from what they need (oxygen and sugar) you'll have less colourfull and less energetically flowing visuals and other effects.

Lysergic acid is a very powerfull vasoconstrictor that will produce these effects in very tiny amounts that some would call 'amounts not active'.

Pure LSD isn't brown.

But "pure" DMT is ?

Can you provide some analysis of the brown vs. white crystals ?

polytrip: If I'm getting this correctly you are saying something along the following. Correct me, if not.

Our hypothetical chemist named Jesse Jerome cranks up some acid. He does not re-x and is therefore left with a bunch of crystals that contain 50% of LSD and 50% of other substances (reagent leftovers, reaction by products etc). He then dissolves 10g of this mixture in an x amount of alcohol (chemistry definition). Since he thinks he has 10g of LSD his estimation of LSD dosages are therefore flawed by at least 50%.

As for your fruit experiment, I'm not really raving on it. Placebo ? If not, just eating pure sugar should do the trick.

That is what i suspect.

If this is the way LSD chemists generally have come to sell their product, just like say volkswagen etc, claim a car uses x lites of gasoline per kilometer, then our smart chemist doesn't need to re-X and come with more accurate figures.

All speculation, but interesting. As someone said before, until prohibition ends and we can get good testing on the various batches/producers, there's no way to tell. I once had a conversation with an old-school LSD distributor (who told me after doing time in 26 different prisons that he's no longer affiliated with the distribution circles) who stated that the various types of crystal determine the quality of the experience. Chinacat72 on the Shroomery also talked about this. There's so-called "fluff", containing a very high-percentage LSD, which dissolves in distilled water. The lower grade purities - amber, lavender, silver, down to so-called "tornado juice" - require alcohol for full dissolution. Apparently "fluff" is much more mental - it doesn't "spin" you or have the physical, mushroom-like effects of the lower grades of crystal. He also stated that the crystals could be manually separated using a microscope - the clearer specks of crystal could be separated for a purer lay, while the colored ones would probably be used for distribution. That type of separation is a low-tech one that a good chemist such as Nick Sand wouldn't use. Another thing he mentioned was that folks on the East Coast actually wanted the less pure crystal; the "fluff" simply doesn't spin you or cause the physical "trip". Left coasters, on the other hand, preferred the crystal-clear "fluff". Personally I've definitely noticed a lot of the acid going around has this 'darker' feel to it (I often wonder if government agents are still involved in its distribution), along with a metallic taste, and definite edgy effects, which makes since given the vasoconstrictive properties of the lysergamides. On a couple of occasions I've had the well made acid and on these occasions I felt the electric effects immediately from having it in my hand - similar to the "contact buzz" phenomenon. Anyways I have no real information to offer, just anecdotes.