A classification of living organisms based on the bacteriological system in the human gut microbiome.

Fecal Microbiota Transplantation (FMT) also known as a stool transplant is the process of transplantation of fecal bacteria from a healthy individual into a recipient.

Probiotics are defined as “live microorganisms which when administered in adequate amounts confer a health benefit on the host.” (FAO/ WHO, 2001)

Prebiotics are dietary substances (mostly consisting of nonstarch polysaccharides and oligosaccharides poorly digested by human enzymes) that nurture a selected group of microorganisms living in the gut. They favor the growth of beneficial bacteria over that of harmful ones.

Synbiotics are appropriate combinations of prebiotics and probiotics. A synbiotic product exerts both a prebiotic and probiotic effect.