TEMPEH has been sitting quietly on Malaysian dinner tables for generations, fried golden at the mamak, tossed into sambal or tucked alongside nasi campur.
While the rest of the world has recently gone wild for fermented foods for gut health, Malaysians have been eating tempeh since before it was trendy.
But does this eating humble fermented soybean cake actually improve your gut health?
Verdict:
TRUE, BUT
The good news is that tempeh genuinely is good for the gut. The slightly complicated news is that whether it delivers its full potential depends entirely how it is cooked.
Tempeh is made by fermenting cooked soybeans in a mould, which binds the beans together into that firm white cake and transforms it in the process.
The fermentation breaks down complex nutrients into forms the body can absorb more easily and produces a whole range of beneficial compounds including antioxidants and organic acids.
For gut health, it creates two things – probiotics, which are live bacteria that take up residence in the digestive system and help keep the gut in good working order and prebiotics, which are the dietary fibres that feed those bacteria.
A study found that eating tempeh for just 16 days significantly increases the levels of a particularly useful gut bacterium called Akkermansia muciniphila, a microbe linked to better blood sugar regulation, improved insulin sensitivity and healthier metabolism overall.
Research published in the US National Institutes of Health's research database confirmed that tempeh consumption also boosted immunoglobulin A, an antibody that forms part of the gut's first line of defence against harmful bacteria and pathogens.
Other peer-reviewed research linked regular tempeh consumption to reduced gut inflammation, lower cholesterol, potentially helping with blood sugar control and possible positive effects on brain function through the gut-brain connection.
Now here comes the catch – most Malaysians cook their tempeh at high heat levels, which will kill any live bacteria.
A peer-reviewed study confirmed that fried, stir-fried or sambal-cooked tempeh delivers what scientists is called paraprobiotic benefits rather than full probiotic ones.
This means heat-inactivated bacterial cells still have measurable positive effects on immunity and gut barrier function but not the same as consuming the bacteria alive.
However, the prebiotic fibre in tempeh remains completely intact after cooking.
The fermentation-enhanced nutritional profile also survives cooking, meaning the body still absorbs far more of tempeh's minerals than it can from unfermented soybeans.
So the bottom line for Malaysians?
Eating tempeh regularly, cooked or otherwise, genuinely supports gut health through its prebiotic fibre, its improved nutritional bioavailability and its paraprobiotic properties.
For the maximum live probiotic benefit, eating a small amount of tempeh lightly steamed or raw would deliver the full package.
For everyone else enjoying their tempeh goreng and sambal tempeh as Malaysian mamaks intend, the benefits are real, just not quite as complete.
Sources:
1. https://www.sciencedirect.com/science/article/pii/S2666833524000364
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC10255641/
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC8658004/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC9263263/
5. https://www.imrpress.com/journal/FBE/16/1/10.31083/j.fbe1601003
6. https://www.nature.com/articles/s41538-026-00754-2
