I kind of want to try it for my IBS and depression.
Don't do it.
a) current results for IBS are very mixed. There were 2 clinical trials last year, and in one there was a minor effect seen, while in the second one the placebo actually performed better. We also just recently submitted the results of the trial, and the outcome is basically random. We suspect that there are more variables to it, like donor or recipient factors, side of administration, mode, duration, etc. So once will not do it
b) results on mental health are mostly based on case reports, and there you always need to see that this might be correlated with overall health state
c) the administration is basically the only really dangerous thing for fecal transplants. If done via the upper route, regurgitation of the donor feces, followed by pneumonia is the worst (and very rare) adverse event, which should also not happen if done properly, and via the lower route, a damage of the intestinal structure (perforation) can happen, if done improperly. Both are not adviced to be done by yourself.
"good mental, intestinal, etc. health who might be willing to give me their poop"
I would add: from someone who did not use antibiotics for a long time (could be infected with clostridium difficile bacteria), has not been on tropical travels (could be infected with micro organisms), does not use medicins
And ask what food pattern. To see if that has enough fit with your food pattern.
(it looks more and more like that part of our health from food is coming from feeding our intestinal bacteria adequately, preferrably ofc the right bacteria)
There are even more things to consider.
- Healthy immune state
-- includes no allergies
-- no colonization by potential intestinal parasites
-- no colonization with potential bacterial pathogens
-- above includes also non-pathogenic variants of pathogens, in case they are multi-drug resistant
- no promiscous sexual behaviour
- healthy BMI
- healthy mental state (things can be hidden)
- Good age range (20-50)
But as said: Don't do it yourself.