Impactos do consumo de alimentos probióticos na microbiota intestinal e imunidade humana: uma revisão narrativa
DOI:
https://doi.org/10.61411/rsc2026128919Palavras-chave:
metagenômica; nutracêuticos; biotecnologia alimentar; fermentação vegetal; encapsulação celular.Resumo
O crescente interesse por alimentos funcionais tem impulsionado pesquisas sobre microrganismos benéficos e seus efeitos na saúde humana, especialmente na modulação do ecossistema intestinal e na regulação das respostas imunológicas. Nesse contexto, o presente estudo teve como objetivo analisar, por meio de uma revisão narrativa da literatura científica recente (2021–2026), os principais impactos do consumo de alimentos contendo microrganismos benéficos sobre a microbiota intestinal e o sistema imunológico humano, destacando mecanismos de ação, aplicações tecnológicas e evidências clínicas. A busca bibliográfica foi realizada nas bases Google Acadêmico, PubMed e ScienceDirect, utilizando descritores relacionados à saúde intestinal, alimentos funcionais e imunomodulação. Foram selecionados artigos revisados por pares que abordassem efeitos fisiológicos associados ao consumo desses microrganismos em alimentos ou suplementos. Os estudos analisados demonstram que esses microrganismos atuam por diferentes mecanismos biológicos, incluindo competição por sítios de adesão com patógenos, produção de metabólitos bioativos e fortalecimento da integridade da barreira intestinal. Observa-se também a modulação da resposta imunológica por meio do equilíbrio na produção de citocinas e estímulo à imunidade de mucosa. Além disso, metabólitos bioativos resultantes da fermentação intestinal contribuem para a manutenção da homeostase metabólica e funcional do trato gastrointestinal. Apesar das evidências positivas, os resultados indicam que os efeitos fisiológicos dependem de fatores como a cepa utilizada, a dose administrada, a matriz alimentar e as características individuais do hospedeiro. Estudos clínicos recentes apontam que nem sempre há alterações significativas na diversidade microbiana, reforçando a necessidade de delineamentos experimentais mais padronizados. Adicionalmente, avanços tecnológicos têm ampliado o desenvolvimento de novas matrizes alimentares, incluindo alternativas não lácteas, embora ainda existem desafios relacionados à estabilidade microbiológica e comprovação clínica dos benefícios. Dessa forma, conclui-se que esses microrganismos representam uma estratégia promissora para a promoção da saúde intestinal e imunológica, porém futuras pesquisas devem priorizar ensaios clínicos controlados e abordagens integradas que consolidem evidências científicas mais robustas.
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