Lactobacillus casei

Which probiotic is it in? All

Species: Lactobacillus casei is the dominant species of nonstarter lactic acid bacteria

Location in the body: The transverse colon, urinary tract and mouth.

This microbe produces: Gamma-Aminobutyric acid or γ-aminobutyric acid (GABA) is a neurotransmitter found in the brain. GABA is a naturally occurring amino acid that works as a neurotransmitter blocking or inhibiting certain brain signals and decreasing activity in the nervous system. Researchers think GAMA may make a person calm or boost mood. It also produces Acetylcholine, another crucial neurotransmitter.


First proposed to be discovered in 1971 but it has a convoluted history whereby research has rejected and reclassified it many times.

Found in:

Raw and fermented dairy products, fresh and fermented plant products.

What does this microbe do?

This microbe is sensitive to intestinal conditions by having higher bile salts. It also binds to the luminal surface of gastrointestinal cells and stimulates gut-associated lymphoid tissue which in turn strengthens the innate immune response giving local and systemic immunity.


Urinary tract infections, IBS, cholesterol-lowering, diarrhoea, alleviates lactose intolerance, inhibits intestinal pathogens.


Best before food. Adult: 10-20ml daily. Children: 5-15ml daily

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