At KYOJIN, we are dedicated to researching, developing, and producing probiotics. Probiotics act on the gut microbiota and have a positive effect on other microbiotas in the body, such as those of the skin, lungs, vaginal area, and scalp. Our products are the result of over 40 years of scientific research and are designed to integrate into a balanced diet, improve quality of life, and reduce the risk of disease. We believe that health is the most valuable asset, and we work to make our solutions as accessible as possible for everyone.
Science applied to health
Our developments are backed by clinical studies in humans and international scientific publications. We apply the highest quality standards to ensure effective, reliable, and sustainable products.
Global presence, local commitment
From Rosario, Argentina, we operate a production facility that supplies both the local and international markets. Our location within Mercosur, with direct access to a port and international airport, allows us to connect with clients and partners around the world.
From Argentina to the world
Contamos con registro vigente en Argentina, Uruguay, Irlanda, España y Estados Unidos, lo que garantiza la distribución legal y segura de nuestros productos en estos mercados. Además, estamos en proceso de autorización en Guatemala, Reino Unido, Egipto, Bahréin, Kuwait, Omán, Qatar, Arabia Saudita y los Emiratos Árabes Unidos, ampliando próximamente nuestra cobertura internacional.
Certified Commitment
We adhere to strict regulatory standards that ensure the quality, safety, and compliance of our products with international production guidelines.
Wholesale Clients
We work with companies that trust us and develop their products using our probiotics. We collaborate with manufacturers of food, beverages, dietary supplements, and pharmaceutical products.
Testimonials
Doctors, researchers, and users share their experiences with our products. Their words reflect the tangible results and positive impact that probiotics have on everyday health and well-being.
News and Developments
Here are our latest articles, where we share research, scientific breakthroughs, educational content, and news about the world of probiotics. If you’d like to keep exploring, we invite you to visit the full Publications section.
Featured Products
We offer a selection of our three most popular products, chosen for their effectiveness and ease of use. You can also browse the full catalog in our store.
Frequently Asked Questions
Below you’ll find answers to the most common questions about Kyojin probiotics. We explain their origin, composition, how to use them, and their compatibility with different diets and special conditions—so you can enjoy their full benefits with total confidence.
Prebiotics are fibers, such as FOS and inulin, that are not digested and serve as food for the beneficial bacteria in the large intestine. They help balance the microbiota and support both gut and metabolic health.
Synbiotics combine probiotics (live microorganisms that provide health benefits) and prebiotics in a single formula. This enhances the survival of the probiotic strain and boosts its beneficial effects.
No, Kyojin is 100% natural and does not contain genetically modified organisms. Its production is also environmentally friendly.
You should take 40 drops daily because Kyojin Gold is formulated with each of its components at 100% of the Recommended Daily Value, delivered in a larger volume (40 drops). This formulation helps prevent unpleasant effects—such as a metallic taste or nausea—during intake. However, some individuals have reported mild discomfort due to the presence of trace metals.
Kyojin Gold probiotic contains the probiotic strain Bacillus subtilis DG 101, trace elements of Selenium, Copper, and Zinc in the form of bisglycinates (which are more bioavailable and provide glycine as an amino acid source for collagen, creatine, and glutathione synthesis), and vitamin B12.
Forty (40) drops of Kyojin Gold probiotic—the suggested daily intake—provide 100% of the Recommended Daily Value (RDV) of probiotic, Selenium, Copper, Zinc, and Vitamin B12 for an adult.
Yes. Due to its composition (Bacillus subtilis DG101, bisglycinates of Selenium, Copper, and Zinc, and Vitamin B12), Kyojin Gold may feel “heavy” and cause a sensation of nausea in some people. This effect is mainly related to the intake of trace metals, especially copper. To minimize discomfort, it’s recommended not to take the product on an empty stomach, or to mix it with food such as juice or yogurt.
No, Bacillus subtilis DG101 is preserved in its natural form, without any genetic modification. It is a completely natural product.
No, Kyojin contains only the Bacillus subtilis DG101 strain, which was isolated in 2003 from natto. It is cultured in defined soy-free media, ensuring its purity.
Yes, Kyojin’s liquid formula contains no animal-derived ingredients. The entire development process is cruelty-free, with no animal testing involved.
No, Kyojin is gluten-free and safe for people with celiac disease or gluten sensitivity.
In some cases, people who follow diets rich in vegetables or fermented foods may experience temporary bloating. This is a sign that the probiotic is adapting to the gut microbiota and usually resolves within a few days. If it persists, it’s recommended to start with 10 drops per day for a week before increasing to the standard dose.
Daily and continuous use is recommended to maintain colonization and its health benefits. After at least six months, and with professional guidance, the dosage may be adjusted (for example, from 20 to 15 drops).
Yes, since it is a food product, it is suitable for children. However, it’s recommended to adjust the dosage according to age and consult a healthcare professional beforehand.
No, as a functional food, it does not cause dependency. Its benefits are maintained with regular use.
There are no known incompatibilities. As a precaution, it is recommended to take it 1–2 hours apart from other medications.
It is a product with no known contraindications or side effects. However, individuals with hemophilia—due to their tendency to bleed—are advised to consult a doctor before use.
Yes, Kyojin is safe for pregnant and breastfeeding mothers. However, it is recommended to confirm this with your healthcare provider.
No adverse effects have been reported when increasing the dose up to 60 drops per day, as long as it is done gradually. However, it is recommended to consult a doctor or nutritionist beforehand.