Lapacho tea is made from tree bark.
It has been used as a herbal medicine by some native tribes, and there were attempts to hype it as a cure for all sorts of things. Scientific evidence does for the most part not support that, though. The claim as a cure for cancer has been disproven, and others, such as reducing skin redness, are based only on one study.
So it should technically be considered as one of the things that may or may not help a little more than water for some people, like green tea. Clearly no strong effect, such as Lisdexamfetamine.
I started taking it over 20 years ago. There was a suspicion of a yeast infection at the time, lab results came back negative, but in the meantime, I googled a bit and tried it. (Yeast infections are one of the many things it's supposed to help with, probably also a false claim.)
I did feel great in the week where I tried it, but my trust in the scientific method is very strong. The most likely explanation was a placebo effect, combined with drinking more than usual and avoiding dehydration, possibly a minor deficit of a micro nutrient it contains.
What it seemed to "fix"? For once what I now know to be undiagnosed ADD symptoms, as well as minor digestion problems that are always part of my life. (Poo too hard, too soft, too slimy, but rarely requiring medical intervention.)
Over the next decades, I occasionally bought a pack and drank it over a few weeks, and that always correlated with feeling great and enormous productivity and clarity of mind. Still, lots of more likely explanations for that other than Lapacho "curing" anything:
- reverse causality: Being in a good productive mood -> energy for making tea
- Usually not drinking enough water -> now that I made tee, I should not waste it
- Confirmation bias, placebo effect, law of big numbers. Lots of people have ups and downs, and certainly one of them in the world would happen to make Lapacho tea during theirs.
- Psychologically / subconsciously associating it with the first 1 or 2 times, where the improvement was just by chance.
But it just happened again. I went back to it, and I switched from a general mood of "life is hard right now" into a new golden age within a few hours. Again with a completely fixed digestion.
And this time, I question the science. It just happened too often. I had an exact measure of how much I drank before. I did not change the amount of caffeine, meds, or food. I definitely did not expect an effect, certainly not a strong one. I took various supplements before to avoid a deficit.
My theory why it might work? I think its mild anti inflammatory effect has not entirely been disproven, and maybe that happens to hit the exact spot of my specific problem. Maybe morbus crohn or similar, also related to gut bacteria somehow affecting or even causing ADHD (controversial, lack of evidence, but not clearly proven to be false, afaik!).
Well, if one of you has a similar situation, minor, but life-long digestion problems combined with ADD, feel free to give it a try. I drink a lot of it, like 1 or 2 cans. Not during pregnancy or when trying for a baby! (Unless that also is false.)
I describe a personal experience. Trust in established treatments with scientific evidence, not an inferred causality and applicability to your situation.

Is it like the "Prison Break" show, where each book he somehow gets trapped on an island AGAIN?
Nobody:
Robinson Crusoe: https://www.youtube.com/watch?v=T-Wc8vluyp0