What Are Fermented Foods and Why Do They Matter?
Fermented foods are those transformed by microorganisms—bacteria, yeasts, or moulds—that break down sugars and proteins into new compounds more easily absorbed by the body.
Well-known examples include yogurt, kimchi, kombucha, miso, tempeh, and kefir. Each has a distinct microbial profile and set of properties.
Comparing Kefir to Other Fermented Foods
| Fermented Food | Microbial Strains | Contains Beneficial Yeasts | Lactose Digestion |
|---|---|---|---|
| Kefir | 30–50 strains | Yes | High |
| Yogurt | 2–5 strains | No | Partial |
| Kimchi | 10–20 strains | Sometimes | Not applicable |
| Kombucha | 5–15 strains | Yes | Not applicable |
| Miso | 5–10 strains | Sometimes | Not applicable |
Kefir’s distinction lies in its unmatched strain diversity and the balanced presence of beneficial yeasts alongside lactic acid bacteria.
The Fermentation Process That Sets Kefir Apart
Kefir is fermented using kefir grains—polysaccharide clumps that house dozens of microbial strains in a three-dimensional structure. This contrasts with yogurt fermentation, which adds only two or three predetermined strains.
The process involves simultaneous fermentation by bacteria (producing lactic acid) and yeasts (producing small amounts of CO₂ and short-chain fatty acids), yielding a far more complex and varied profile.
Key Strains That Make Kefir Exceptional
- Lactobacillus kefiranofaciens — produces Kefiran, a unique kefir polysaccharide with anti-inflammatory properties.
- Bifidobacterium spp. — associated with colon health and immune support.
- Saccharomyces cerevisiae — a beneficial yeast that may help inhibit Candida.
- Lactobacillus acidophilus — aids lactose digestion and suppresses pathogens.
- Streptococcus thermophilus — supports an acidic environment in the gut.
Why Kefir Suits the Thai Lifestyle
The hot climate of Bangkok and the region, combined with a diet often high in sugar and starch, can disrupt gut microbial balance. Kefir, with its wide microbial diversity and low sugar content (2.1g per 100ml in Rokabo’s formula), aligns naturally with the health goals of those mindful of their microbiome.