America Made BLOATING Normal After the 70s. Here's Why.

Bloating was rare in 1975. Today about one in seven adults feels bloated almost every week. Four decisions did it, and all four can be reversed. Inside: the emulsifiers hiding in your bread as "cellulose gum", the sugar alcohols that ferment into gas, what antibiotics did to the 38 trillion bacteria in your gut, and the one change that works in days rather than weeks. It's all linked below. #Bloating #GutHealth #GenX SOURCES: HOW COMMON BLOATING IS NOW About 1 in 7 Americans reported bloating in the past week - Ballou et al., survey of 88,795 adults, Clinical Gastroenterology and Hepatology 2023 https://www.cghjournal.org/article/S1542-3565(22)01020-5/fulltext Bloating prevalence and associated factors - Rome Foundation Global Epidemiology Study, Gastroenterology 2023 https://www.gastrojournal.org/article/S0016-5085(23)00826-0/fulltext YOUR GUT AS AN ORGAN Roughly 38 trillion bacteria in the human body - Sender, Fuchs & Milo, PLOS Biology 2016 https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1002533 Normal intestinal gas production in healthy volunteers - Tomlin & Read, Gut 1991 https://pubmed.ncbi.nlm.nih.gov/1648028/ Volume and composition of human intestinal gas - Levitt, New England Journal of Medicine 1971 https://pubmed.ncbi.nlm.nih.gov/5578321/ DECISION ONE - WE HANDED OUR KITCHENS TO FACTORIES Ultra-processed food is over half of adult calories - CDC NCHS Data Brief 536 (2025) https://www.cdc.gov/nchs/products/databriefs/db536.htm Dietary emulsifiers alter gut microbiota, thin the mucus layer and promote colitis and metabolic syndrome (mice) - Chassaing et al., Nature 2015 https://pubmed.ncbi.nlm.nih.gov/25731162/ Carboxymethylcellulose in a randomised controlled feeding study in humans - Chassaing et al., Gastroenterology 2022 https://pubmed.ncbi.nlm.nih.gov/34774538/ Emulsifiers alter human microbiota composition ex vivo - Chassaing et al., Gut 2017 https://pubmed.ncbi.nlm.nih.gov/28325746/ Direct impact of common dietary emulsifiers on human gut microbiota - Naimi et al., Microbiome 2021 https://pubmed.ncbi.nlm.nih.gov/33752754/ DECISION TWO - WE REPLACED SUGAR WITH THINGS THAT WERE NEVER FOOD US per-capita sweetener availability and the 1999 peak - USDA Economic Research Service, Sugar and Sweeteners Yearbook https://www.ers.usda.gov/data-products/charts-of-note/chart-detail?chartId=77468 Artificial sweeteners and gut microbiota in mice - Suez et al., Nature 2014 https://www.nature.com/articles/nature13793 The honest caveat - findings and challenges in replicating the sweetener microbiome results https://www.tandfonline.com/doi/full/10.1080/19490976.2015.1017700 DECISION THREE - WE OVERUSED ANTIBIOTICS Recovery of gut microbiota after antibiotic exposure: some species still missing at six months - Palleja et al., Nature Microbiology 2018 https://www.nature.com/articles/s41564-018-0257-9 Infant antibiotic exposure and childhood health outcomes - Aversa et al., Mayo Clinic Proceedings 2021 https://pmc.ncbi.nlm.nih.gov/articles/PMC7796951/ DECISION FOUR - WE REMOVED FIBER AND FERMENTED FOOD Fiber intake of the US population - USDA Food Surveys Research Group dietary data brief https://www.ncbi.nlm.nih.gov/books/NBK589559/ Most Americans do not get enough fiber - American Society for Nutrition https://nutrition.org/most-americans-are-not-getting-enough-fiber-in-our-diets/ Seasonal gut-microbe diversity in the Hadza of Tanzania - Smits et al., Science 2017 (Stanford) https://med.stanford.edu/news/all-news/2017/08/hunter-gatherers-seasonal-gut-microbe-diversity-loss.html WHAT ACTUALLY WORKS A fermented-food diet increased microbiome diversity and lowered inflammatory markers - Wastyk et al., Cell 2021 (Stanford) https://pubmed.ncbi.nlm.nih.gov/34256014/ https://med.stanford.edu/news/all-news/2021/07/fermented-food-diet-increases-microbiome-diversity-lowers-inflammation.html Most people eat across a window longer than 14-15 hours - Gill & Panda, Cell Metabolism 2015 https://pubmed.ncbi.nlm.nih.gov/26411343/