Your Gut Health Guru - Supporting your gut health since 1999
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A leap forward in gut heath
We did the research so you can get the results
At OSN, our formulas are backed by more than tradition—they’re backed by science. One of several clinical studies on our products examined FPE (Fermented Plant Extract), the core ingredient in Active Guard, and was conducted at Okayama University and Sonoda Women’s University in Japan.
The study found that FPE helped reduce key inflammatory markers (including IL-6 and TNF-α) while increasing beneficial gut bacteria such as Clostridiales—microbes known to support intestinal balance and regulate inflammation.
This is just one of the clinical studies validating our approach: combining multi-year, seasonal fermentation techniques with evidence-based gut wellness.
Read About the Study HereYour Gut Health, in Expert Hands
Guided by professionals in clinical care and nutritional health, OSN delivers products grounded in scientific research and real-world results.
Dr. Amir Farid Isahak
Obstetrics & Gynecology, Anti-Ageing Expert
Dr. Zulkifli Ismail
- Secretary General of the Asia Pacific Pediatric Association (APPA)
- Consultant pediatrician & pediatric cardiologist at KPJ Selangor Hospital
- Visiting pediatric cardiologist at KPJ Damansara Hospital.
Dr. Nathan Ganapathi
PhD in Microbiology, Biotechnology, & Forest Pathology.
Dr. Sharifa Shahreen
Functional Lifestyle Medicine Doctor
Celeste Wong
Nutritionist
Simplify Your Path to Wellness
No more juggling a handful of pills. Active Guard brings together gut-friendly bacteria, plant-based nutrients, and naturally occurring vitamins and minerals—all in one easy softgel. Feel good, stay consistent, and keep things simple.
Join our OSN Family!
Seah Zhang Yu
Beating Asthma, Becoming a Champion
- The Youngest & 3 times Malaysian Invasion Mixed Martial Arts (MMA) Champion
- Under Armour Test of Will Fitness 2018 Champion
- ASEANS's Are You Tough Enough 2019 Champion
- Redline Fitness Games 2024 Men's Single Competitive Silver
- Redline Fitness 2025 Mixed Doubles and Mixed Team Relay Competitive Gold
Leonard Chua
Pei Shuang
I feel less bloated during competition with Activia!
- Malaysia Dodgeball National Player
Awatif Ezzah
Consuming since 2020, can't live without OSN products!
- RTM News Anchor
- Sports Manager of Rangers Youth Sports Academy
Amanda Love
- Content Creator
- Managing her IBS issues with OSN products, consumer of 1 year
Let customers speak for us
Discover our community events, wellness workshops, and gut-friendly gatherings.
#TheGutHealthClub
Our Signature Range
From daily gut support to wholefood nutrition, our signature range is designed to work together—naturally.
Learn More
Active Guard
Proudly made in Okayama, Japan—fermented over 3 years with 75 fruits, vegetables, and 17 probiotic strains. Crafted through all four seasons to deliver a potent, nutrient-rich extract that’s easy to absorb and built for daily gut harmony.
Active Greens
A nourishing blend of Ashitaba Leaves, Barley Grass, Chlorella, and Spirulina—four of nature’s richest greens from soil, freshwater, and sea. Organically grown and gently spray-dried to preserve live enzymes, antioxidants, and essential nutrients for whole-body vitality.
Activia
A modern superfood blend of micro-milled chia seeds, rich in plant-based Omega-3, fibre, and natural prebiotics. Lightly sweetened with Monk Fruit for a refreshing taste, Activia supports digestion, sustained energy, and mood balance—ready to enjoy in just 3 minutes.
25
Years of Service
Since 1999, OSN has been the only company in Malaysia to produce 100% natural whole foods. Our signature range is made with the purest plant-based ingredients, harvested with the natural cycle of nature in mind.
40000
Customers Served
At OSN, we're more than just a wellness brand—we’re a community built on care, education, and real results. Every person we serve is part of our mission to make gut health simple, natural, and sustainable. Whether you're just starting your journey or continuing your path to better health, we're here to support you—every step of the way.
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Have A Question ? We Are Here To Help.
Check out the most common questions our customers asked. Still have questions ? Contact our customer support.
Are OSN products safe for all ages?
All OSN products are safe for most ages including the elderly and children. With infants and babies under the age of 1, here are the guidelines:
Active Guard: Babies who are at least 6 months old and are starting to eat solid foods can begin to take the Active Guard paste! Parents can squeeze the paste out of the capsule for their children.
Activia and Active Greens: We recommend that infants and babies under the age of 1 do not consume Activia and Active Greens as their digestive systems are still developing.
Do consult your pediatrician before introducing any new food or supplements into your babies' diet!
Are OSN products safe for pregnant and lactating mothers?
ll OSN products are safe for pregnant and lactating mothers, as well as their babies. In fact, we recommend mothers take OSN Active Guard during pregnancy to ensure their baby has high levels of friendly bacteria even at a young age.
I have a specific health condition. Which product should I take?
Please share more details with us via email at info@osn-sg.com, or through our live chat/WhatsApp so we can provide a more specific recommendation!
My product has expired. Is it still safe to consume?
- For Active Guard: If your product doesn’t display any whiteish discoloration, it is still safe to consume.
- For Active Greens and Activia: If your product doesn’t contain any clumps or solidified powder at the bottom of the container, it is still safe to consume.
Can I return or exchange the products?
General Policy: At OSN, we prioritize the quality of our products and perform three rounds of stringent quality checks to ensure that the goods you receive meet our high standards. As a result, we do not generally accept returns or offer refunds on our products. We understand that unforeseeable situations can occur, and we want to address those cases to ensure your satisfaction. Therefore, we offer the following exception to our general policy:
In the unlikely event that you receive a damaged product, we are here to assist you. To qualify for an exchange, please notify us within 3 days of receiving OSN products. (Exceptions apply.)
Note: This return and exchange policy is subject to change without notice, and the most up-to-date version will always be available on our website.
What constitutes a damaged product that qualifies for an exchange?
Damaged products are defined as follows:
a. Active Guard: Products showing white spots or discoloration that were not caused by customer mishandling.
b. Activia and Active Greens: Products that develop wet clumps, excluding cases where the products have been stored for more than 3 years.
