We start life with a sterile gut.
But did you know how this changes?!!
As the infant’s head passes through the birth canal, the baby ingests bacteria that begin to instantly colonize the gut.
When first put to the breast to nurse, the baby consumes unique strains of bacteria that only inhabit the area around the mother’s nipple. These provide a cocktail of breast milk and friendly bacteria that foster strong immunity. As the infant thrives, intestinal flora colonies multiply quickly, and levels climb high.
If antibiotics are indiscriminately used, however—as when treating minor ailments like seasonal colds or earaches—bacterial levels decline dramatically. This drop off can result in early-age immune disruption that may affect adult health.
Over a lifetime, the bacteria we harbored as infants decline and some disappear; new ones appear, and as we age many of the best ones are gone. These changes not only affect the health of our digestive system, but also how well we absorb nutrients from food, and how well the immune system protects us from routine viruses like the common cold to serious illnesses like cancer.
The gut is such a blessed immune gift to us in life so we need to keep the intestines performing for the immune to be “alive”.
The Gut, Your Immunity, and Aging
Researchers have found that as we age, imbalances in gut bacteria produce an environment conducive to dybiosis, a term signifying ecological disruption in the gut. Your gut is like a forest. Everything depends on something else, and all things depend on the overall health of the trees. Dysbiosis leads to unhealthy tissue changes of the gut lining, causing increased inflammation, which is associated with weakened immunity.
Older people grow more toxic bacteria and harbor fewer beneficial ones.
Researchers found that seniors have more gram-negative bacteria like Enterobacter and other potentially pathogenic ones in their large intestines that cause inflammation.
These are linked to urinary and respiratory infections, and obesity.
So older people have less beneficial bacteria like lactobacilli and bifidobacteria species.
There is less diversity of bacterial groups, and bacterial overgrowth of the wrong types in the small intestine is more common in older people.
Throughout life, continual exposure to an ever-changing environment, dietary abuses, infections, overuse of antibiotics, etc either support microorganism evolution of the intestinal microbiota or disrupt its ecology and function.
Body changes in the aging intestine can have profound and noticeable effects on the microbial composition and your health.
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