Advice about supplements and pre/probiotics

Each supplement is different in their requirements needed to reach the colon. For example, with some probiotics simply adding glucose greatly increases chances of survival. Others are actually better systemic like nicotine while others deliver themselves to the colon like plain curcumin.
For phosphatidylcholine, I have not heard of an effective compound, most research is around enteric coating to deliver it toward the later part of the ileum. The ileum is part of the small intestine but its important to point out it is the later part. Enteric coating usually tries to avoid release in the stomach or early parts of the small intestine. So far though, they havent started selling the enteric coated phosphatidylcholine in the US as far as I am aware. I believe they are trialling it.
Phosphatidylcholine is useful in a deficiency state but I believe inhibiting phospholipase via eugenol may be more effective regarding the health of the intestinal barrier.

I take it via a clove oil. I have a vial of clove oil at home with instructions, I'll update later. Whatever the dosage was listed, I take half the dosage and I don't take it every day. Going above dosage creates risk of testicular and I believe liver toxicity but is safe at or below dosage. Also fun is it increases testosterone for males. I drop the dose into a capsule and take it that way, the flavor is pretty strong.
I can attest, it did help me and it doesn't require every day maintenance.

Thanks a million Sinmiedo.
I will try it myself. In what sense did it help you? Less severe symptoms?

I don't actually like probiotics oddly partly because most of them made me dramatically worse than my normal symptoms but also because of the lack of a full picture. Probiotics are sold as being the good guys in the gut for everyone but most don't understand the full scope of what a single strain of bacteria changes in the body and biome. There are short term changes and long term changes, shifts in competition, epigenetics, changes in food based metabolites.
Eugenol and clove oil as an example has a lot of predictable effects partly because the impact on the biome is limited. It's been fairly well studied so I can understand it easier than a mixture of bacteria that's considered generally good.
I am however a huge fan of FMT and wish it was more accessible.
Not saying probiotics are bad but I don't prefer them or see them as my solution though I do try to influence them by other means.

Apologies, I missed a question =)
As far as how it helped me, it increases my tolerance to foods I wasn't supposed to eat at the time and lowers the pain and symptoms so I was less likely to bleed or hate myself after spicy food. It gave me more good days at the time. I could also see the mucus increase.
Some interesting information on what I have pieced together is there are certain bacteria that break down the mucus barrier but some types actually break down the barrier and create butyrate as a byproduct which signals the gut to increase the mucus thickness which increases protection. The types that uses certain phospholipases break down the mucus barrier but does not create the butyrate feedback mechanism to increase it which thins the mucus barrier reducing protection amd exposing the gut wall. Eugenol inhibits certain phospholipases which allows the butyrate producing bacteria to flourish more.
This is my piece together, there may be innacuracies.

I haven't seen any solid science recommending 2 weeks. To be honest, in looking for reputable sources of science, Dr. Axe is on my personal no list.
The primary issue from what I've seen is dosage rather than time. There is the study Dr Axe linked showing liver protection at lower doses (during reperfusion) but liver damage at higher doses. Similarly there are studies showing increased testosterone at a moderate dose but testicular damage and lowered testosterone at doses that are too high.
I have not stumbled on any studies of long term consumption but to be fair, it is pretty easy to logic this one. Are there any cultures that use cloves on a daily basis? Yep, it's widely used in cooking. Would there likely be studies if moderate consumption of cloves was destroying testicles and livers? You betcha, it would be easy to track cloves considering their usage. This means the low amount found in cloves is likely safe. So the question is how high is safe more than how long.
To be fair, out of concern for the dosage, I calculated the ideal dose of eugenol, ran the percentages and halfed the recommended dose. I don't have that info with me or I would post it.
Also noteworthy is the sustainability aspect. I don't take it every day as it is shown to increase already present bacteria as a mechanism which likely won't require every day maintenance. Currently I take it every few days still at half dose.
As for essential oils in general, there is not a lot of study or experts regarding them. I don't really count the aromatherapists =]
I beleive them to be relatively safe in comparison to most medicines but I also beleive that anyone taking them should be very well informed before trying. It's important to know the traits of what you're using.
As a side note, I believe clove oil may be a blood thinner, I'll have to confirm after work.