I keep seeing in magazines a syndrome called Leaky Gut Syndrome....?!

I keep seeing in magazines a syndrome called Leaky Gut Syndrome....?

is this really a true ailment or is this just something someone has made up to sell a product? I would like a good answer, because when I read the articles I have all the symptoms. If it is a true ailment has anyone ever had it and been cured?

Leaky gut syndrome is a diagnostic entity popular in various branches of alternative medicine. Its proponents hypothesize that damage to the bowel lining, caused by antibiotics, toxins, poor diet, parasites or infection (e.g. with the yeast Candida albicans) [1] can lead to increased permeability of the gut wall to toxins, microbes, undigested food, waste or larger than normal macromolecules.[2] Some versions posit that these substances affect the body directly, while others postulate an immune reaction to these substances.[3] While many practitioners maintain that leaky gut syndrome is a bona fide medical condition, the area of "gut problems" lies between conventional and alternative medicine, including other diagnostic titles such as Small bowel bacterial overgrowth syndrome or small intestine bacterial overgrowth (SIBO), and "yeast syndrome" or systemic candidiasis, remains controversial and scientifically unsettled.[4]

The concept of increased gut permeability itself is well recognised in various conditions, such as hepatic encephalopathy. It has been discovered that Zonulin regulates intestinal permeability.