Lactobacillus johnsonii, often abbreviated to L. johnsonii, is a very beneficial probiotic found in certain fermented foods, dairy products, and probiotic supplements. It plays an important role in gut health, immune function, and pathogen suppression.
1. Foods that may contain Lactobacillus johnsonii
① Dairy products
Yogurt: especially active cultures rich in probiotics
Kefir: This is a fermented milk drink containing multiple probiotic strains
Certain cheeses, such as Gouda, Swiss, or other aged/fermented cheeses etc.
② Fermented foods
Sauerkraut: such as naturally fermented unpasteurized cabbage
Kimchi, such as Korean fermented vegetables, which may contain Lactobacillus johnsonii
Miso: fermented soybean paste, rich in beneficial bacteria
Fermented soybeans: fermented soy products
③ Probiotic supplements
Some high-quality probiotic supplements (such as Culturelle, Align, or specific strains) often contain Lactobacillus johnsonii. Please check the label for specific strain information, such as LA-1 or NCC 533.
④ Breast milk and infant formula
Some studies have shown that Lactobacillus johnsonii may enhance intestinal immunity by being present in breast milk and certain infant probiotics.
2. Key Health Benefits of Lactobacillus johnsonii
✅ Regulates Gut Health and Digestion
It helps balance gut flora, aids digestion, and reduces bloating, diarrhea, and constipation.
✅ Helps Immune System Support
Stimulates immune cells (e.g., macrophages, T cells) to enhance defenses against infection. And it reduces the risk of respiratory infections (e.g., colds, flu).
✅ Fights Harmful Bacteria
Competition with pathogens such as Helicobacter pylori (associated with stomach ulcers). It can inhibit Candida albicans (a common fungal overgrowth).
✅ Potential Metabolic Benefits
Some studies show that it helps lower low-density lipoprotein cholesterol (LDL-C). May support metabolic health by improving gut barrier function.
✅ Infant Health
Colonization in early infancy can reduce the risk of eczema, allergies, and infections.
How to ensure Lactobacillus johnsonii intake?
✔ Choose "active culture" fermented foods (e.g., yogurt, kimchi) that are refrigerated.
✔ Look for the specific strain name in your probiotic supplement (e.g., *Lactobacillus johnsonii LA-1*).
Do you need recommendations for foods or supplements rich in Lactobacillus johnsonii? Let me know! 😊