Yeah I was thinking they have been doing this for like 30 years now, and then I made the mistake of googling it.

Fecal microbiota transplantation (FMT), or stool transfer therapy, originated in 4th-century China (c. 300-400 CE), where human fecal suspensions were used to treat severe diarrhea and food poisoning. The first documented use in modern Western medicine occurred in 1958 by surgeon Ben Eiseman to treat pseudomembranous colitis.

4th Century China: Known as "yellow soup" or fecal suspension, it was used by Ge Hong to treat diarrhea.

TIL

But the theory is sound...

The human body is composed of roughly 30 to 39 trillion bacteria and approximately 30 trillion human cells, resulting in a roughly 1:1 to 1.3:1 ratio of microbes to human cells. While microbes outnumber or equal human cells, they only account for about 0.2 kg to 2 kg of total body mass, meaning by weight, the body is over 99% human.

It kinda disturbs me to think I have some microbes living in the pores of my eyebrows.

The microscopic creature that lives in human hair follicles, including the eyebrows and eyelashes, and is commonly described as never pooping (or lacking an anus) is the Demodex mite (specifically Demodex folliculorum and Demodex brevis).

The "No Poop" Myth/Fact: For a long time, it was believed that Demodex mites lacked an anus and therefore stored all their waste throughout their entire life, releasing it all at once when they died. However, a 2022 study found that they do have an anus, but they are often still cited as having a "rudimentary gut" that rarely discharges waste, making the old description popular in science communication.

But its been linked for a while now that people with large concentrations of "bad gut bacteria" have a slew of health problems, its also been proven your stomach/gut has a "mini brain" which coordinates digestion.

What is it? The ENS is a vast,, complex network of over 100 million to 600 million neurons—more than in a cat's brain—embedded in the walls of the gastrointestinal tract, stretching from the esophagus to the rectum.

It also turns out that ethnicity's have their own microbiome flora as well.

Scientific studies indicate that while the core human gut microbiome is similar across the globe, distinct variations exist between different ethnicities and geographic populations. These differences are largely driven by a combination of dietary habits, cultural practices, lifestyle, environmental exposures, and, to a lesser extent, host genetics.

Whats interesting too, is the "bad bacteria", has figured out a way to secrete a substance that makes you feel hungry so that you keep feeding it.

Yes, research indicates that imbalanced or "bad" gut bacteria can secrete substances and produce metabolites that increase hunger, trigger cravings, and sabotage feelings of fullness. When the microbiome is in a state of dysbiosis (an imbalance between beneficial and harmful bacteria), it can manipulate host behavior to favor the consumption of foods that help those bacteria thrive.

Prolly worth mentioning, we are literal walking bacterial colony's, we need them to survive, so I would like to keep mine. But within 15 minutes of someone stepping into a room, they will start to "infect" the space around them.

Human occupancy rapidly changes the microbial composition of indoor air, with studies showing that individuals emit a "microbial cloud" of bacteria and fungi—ranging from (10^{6}) to (10^{7}) particles per person per hour—that can be detected in surrounding air within a very short timeframe. While specific, distinct identification of an individual's cloud often takes 1.5–4 hours in controlled studies, the total airborne bacterial load significantly increases almost immediately upon entering a room.

There are diseases where you gut microbes have been so destroyed, that they try to re-establish their population from a donor. So as ridiculous as it initially sounds, this is an area of study.