Just wondering if all mescaline cacti green inner flesh should taste VERY BITTER?
Or does some tasre only ..[slightly bitter].. and still contain good amount of mescaline?
I just purchaced some cacti that is suposed to be T Peruvianus and when i tasted the inner green flesh it tasted simmilar to a cucumber only mildly bitter...
I wonder it this means i bought the wong type of cacti by taking the word of the atendant at the cactus farm?
Does lack of bitterness...but only slightly bitter... mean cactus is weak on mescaline?
any advice apreciated...

same here, same here...

Lack of bitterness indicates relative lack of mescaline, and usually relative lack of potency.
Strong bitterness, however, doesnt guarantee any mescaline at all.
Seasonal variation, cultivation technique, and curing of cut stems can effect alks quite a bit.

People would be well advised to, as a general rule, not buy live peruvianus.
There has never been a time when the majority of 'peruvianus' sold have actually been peruvianus. [Fantastical claims of peruvianus potency circulated widely in 'legal highs' books when there was no commercial source for peruvianus so people made a fortune selling mislabeld plants as peruvianus, and thats why to this day many people sell cuzcoensis et al. as peruvianus]
If one buys a 'peruvianus' they are lucky if its at least a macrogonus or pachanoi.

Best bet for actually getting what you pay for is with bridgesii. It became available in the cactus trade before its activity was widely known, so there was never the deluge of fakes as seen with peruvianus.

Yes..I think i bought some other species of cacti that looks like peruvianus...
I took the promise of the cactus farm worker that it was sanpedro macho..but I think he was mistaken too...
I have bought [SM]..from this cactus nursery before..it was called ..[sanpedro macho] and it was super strong that year..
Last year..I bought dryed and ingested .. [sanpedro macho].. powder ..[from same cactus farm]..in 7 or 8 5oomg capsules and it was quite strong..equaling only about 3 to 3 1/2 grams of powder..
If one looks up the name [sanpedro macho] its just another name for [T Peruvianus]..
Well i made a mstake on identifying the cacti i think it was another type in same cactus family..
I think that regular [san pedro] would have been a better choice this time and wonder why ...
[T peruvianus].. is harder to get at cactus nurserys now a days?
This sucks because they charge 30 to 45 dollars for one three foot cacti...

Unfortunately most of the San Pedro that is commercially available (in North America at least) has an extremely low mescaline content, from my understanding.

Yes, the cacti sold as san pedro in north america and to a large extent in australia and europe is a particular and rather peculiar clonal line 'PC' or 'Backberg Clone' that has low to extremely low mescaline content. Its easy to spot tho.
Ironically, genuine pachanois are often mistaken for peruvianus or macrogonus in the US market due to their spines being over 4 mm long. They are even some times branded as 'short spine peruvianus' to exploit the peruvianus popularity and to hint that they are actually of worthwhile potency.

Some additional points:
1 some active plants can be bland and then bitter both seasonally and responsively to various treatments.
2 some weakly active plants are extremely bitter.
3 mescaline is very bitter but a few decent clones are not as bitter as you would expect but they may not acctually have as high a mescaline content as their activity would suggest.
4 there is still a lot that is unknown about the chemistry and activity of these plants and many questions and theories exist. The data available is not feasibly indicative of the qualitative and quantitative aspects of trichocereus chemisty, if anything it suggests that we do not know enough to make realistic claims about alkaloid content.

I think i mistakenly bought a long spined [cuzcoensis] for a peruvianus!
only my self to blame...

Use it as a grafting stock source. They work great.

Yeah, my PC pedro are extremely bitter, but i'm sure there isn't much mescaline in it. I'm guessing that has to do with other alkaloids, but i'm not sure.