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Frequently Asked Questions

Healthcare Related Questions, Answered for You

What is NIM?

NIM is an acronym for: New Intestinal Microbiota.
NIM is a natural ecosystem of normal intestinal bacteria cultivated and propagated regularly in the laboratory (in vitro). After 20 years of cultivation NIM has retained the same rich biodiversity as the original stool sample, originating from a healthy donor in 1995.

When is NIM used?

ACHIM can restore the ecological balance of the gut when it has been disturbed (dysbiosis) e.g. after antibiotic treatment.

Are there any side effects?

NIM has until now been given to over 400 patients without any serious side effects being observed. Some patients have minor trouble with ”abdominal bloating” and flatulence a few days after receiving NIM. This is the same type of side effects observed after traditional feces microbiota transplantation (FMT).


Microbiological tests have shown that NIM is a well balanced functional microbiota, and that it after 20 years of continuous cultivation still contains the same big microbial groups – Phyla, (Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria) found in the original feces sample. No new bacteria have entered the culture, and, therefore, NIM is free from bacteria exposed to antibiotics in use after 1995.


The risk of transferring any donor related component is negligible, as the donor of the original stool sample was healthy, and the microbiota since then has been cultivated anaerobically in the laboratory under strict conditions.

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