Probiotics are foods, like yogurt, or dietary supplements that contain living bacteria. why would someone want to knowingly consume bacteria?

pregnancy happens more and more

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.