How Your Gut Bacteria Can Influence Your Weight

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Food breakdown and nutrient absorption depend on gut bacteria. Bacteria that extract calories from food more efficiently can cause weight gain.

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Digestion and Nutrient Absorption

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 Gut bacteria produce chemicals that regulate appetite, fat storage, and energy expenditure. Some bacteria produce short-chain fatty acids (SCFAs) that affect energy and fat storage.

Metabolism Regulation

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Inflammation and insulin resistance from gut bacteria imbalances are linked to obesity and metabolic disorders.

Inflammation, insulin sensitivity

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Gut bacteria also affect appetite hormones like ghrelin and leptin. Hormonal signal disruptions can cause overeating and weight gain.

Hormonal Regulation

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The gut microbiome—the types and abundance of bacteria—varies widely among people. High gut bacteria diversity has been linked to a healthier weight.

Microbiome Composition

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The gut microbiome is shaped by diet. A diet high in fiber and plant-based foods promotes beneficial bacteria, while processed foods and sugar promote harmful bacteria.

Dietary Influence

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