From the point of view of industrial development, postbiotics, which are the metabolic byproducts of probiotics, are nonliving and, thus, more stable and have a longer shelf life than live probiotic strains
The US Food and Drug Administration (FDA) has issued a warning letter on 14 April to New Life Pharma, identifying significant current good manufacturing practice (CGMP) violations
This happens through three mechanisms: dietary modification (reducing sulfur-containing substrate), competitive exclusion (introducing beneficial bacteria that outcompete SRB), and environmental optimization (maintaining conditions that favor beneficial bacteria over SRB)
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Like other medications, one may work better for some people compared with another