synbiotic duo cap.

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synbiotic duo cap.
4.59 reviews 4.59

Duo cap® technology is 30x more effective in reaching the gut alive, ensuring targeted delivery within the gut.

30x more effective in reaching the gut alive.

One potent daily dosage contains 11 clinically trialled bacterial strains alongside FOS fibre, vitamin D, zinc and biotin. Duo cap® technology ensures targeted delivery within the gut. Just once a day, every day.

50 billion CFU. Best taken daily over a minimum of 3 months.

One potent daily dosage contains 11 clinically trialled bacterial strains, FOS fibre, vitamin D, zinc and biotin. With duo cap® technology to ensure 50 billion CFU reach the gut alive.
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€39,99
• 30 servings
• €1.33 per serving
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One-time purchase
30 servings
3 products
90 servings
Save 10%
6 products
180 servings
Save 15%
START NOW

Free delivery on all EU orders

EU and International shipping rates vary, and you may also need to pay local taxes. For more information on delivery times and rates visit our Shipping Page.

Skip, pause or cancel your subscription anytime

The British Society of Gastroenterology recommends taking a new bacterial product for a minimum of 3 months, which is why we've made it easy (and more affordable) to subscribe. Skip, pause or cancel anytime from your subscription page.

90 day money-back guarantee

We truly believe we have created the best digestive health supplement on the market. Therefore if you don't see results after taking our synbiotic for 90 days (once a day, every day) our money-back guarantee exists to protect you. Read more on our Policies Page.

Eco-friendly packaging info

Your first order arrives in a reusable jar. Keep your jar. From your second order onwards, refill sachets will arrive every three or six months for effortless top ups.

“Out of the non-fermented options, I've personally found Seenbyo to work wonders.”

“Recognised as one of the best bloating supplements to try in 2025.”

"With 50 billion colony-forming units (CFU), it's one of the most potent supplements on the market."

Product

"You might feel as if you stumbled upon a revolutionary hack or 'magic pill'."

your unique journey.

Your microbiome is as unique as you are - it's as unique as your fingerprint. Therefore, your journey will be unique to you too. Here's what you may expect, with some variance to be expected.

Day 0 image
Day 0
Your new daily habit starts. Remember, just once a day, every day.
Week 1 image
Week 1
Your body starts getting acquainted with its new guests.
Month 1 image
Month 1
You have cemented your new routine, with some fluctuations still possible.
Month 3 image
Month 3
Your body starts to adapt, finding tempo and balance.
Month 6 image
Month 6
Personal discoveries? We'd love to hear them.

optimised by technology.

Seenbyo synbiotic duo cap. is the meeting point of science and simplicity. 30x more effective than a standard capsule, its unique capsule-in-capsule design ensures targeted delivery of ingredients within the gut, where the microbiome thrives.

pill

The transparent outer shell is designed to break down in your stomach, releasing fructooligosaccharides (FOS) fibre, which act as food for the live bacteria. It also contains Vitamin D3, Biotin and Zinc, all of which have been included for their role in supporting a healthy gut.

outer

Not visible to the naked eye, within the green inner capsule are 50 billion live bacteria. Protected by the outer shell as it makes its way through the stomach, this inner capsule is able to continue through the gastro-intestinal tract, breaking down in the intestines and releasing the live cultures into your gut microbiome.

inner

what sets seenbyo apart?

pre + pro = synbiotic duo cap.

leading liquid
leading capsules
potency. CFU/g (billion)
50
10
10-20
duo cap technology.
diversity. number of bacterial strains
11
4
7-14
prebiotic included.
vitamins & minerals included.
convenient storage.
yescupboard
norefrigerated
yescupboard
convenient consumption.
yes1 a day
yes70ml a day
no3+ per day
price per serving. starting from prices
€1.33
€1.43
€1.33

What exactly is your microbiome and why is it important?

When is it appropriate to take a supplement for gut health?

What can I expect from taking the synbiotic duo cap?

What is Seenbyo synbiotic duo cap?

What is unique about this capsule?

What can I expect from taking the synbiotic duo cap?

Is the synbiotic duo cap a probiotic?

The capsule contains live bacteria, therefore it can be considered a probiotic. It also contains fructooligosaccharides (FOS) which can be considered prebiotics. However, we refrain from using such terms as UK Law prevents this, seeing our products as food supplements to which no health claims can be associated.

How long do I need to take the synbiotic duo cap for?

We recommend taking one capsule a day for a minimum of 3 months. This is how long your microbiome needs to adjust to the new bacteria, as also recommended by the British Society of Gastroenterology to anyone trying a new bacterial product.

Can I take other supplements alongside this for my gut or is Seenbyo enough?

The synbiotic duo cap has been designed to provide one potent dosage of 50 billion live bacteria in one capsule, from 11 unique strains, alongside other vitamins and minerals that support overall gut health. Therefore as far as live bacteria supplements go, our synbiotic duo cap should be enough.

What are the active ingredients in the synbiotic duo cap?

Our capsule combines live bacteria with other vitamins and minerals for added digestive value. See the full nutritional information table for more information.

What are the active ingredients in the synbiotic duo cap?
Are there any side effects from taking the synbiotic duo cap?

Our gut microbiome is as unique as our fingerprint, therefore your experience with our products will be unique to you. Whilst there should be no adverse effects, some people have reported experiencing an upset stomach, gas, diarrhea, or bloating. Those symptoms usually go away after your body gets used to the bacteria in the synbiotic duo cap (usually within 1-4 weeks).

Other than my gut, will I find any other benefits to taking Seenbyo?

Seenbyo is officially classed as a food supplement by UK law, and therefore we cannot legally claim specific health benefits ourselves. We encourage you to do your research.

ALL ANSWERS

The importance of a healthy gut microbiome.

Our gut bacteria play an incredibly complex and critical role in helping us thrive. The microbiome affects everything from digestion to the immune system, hormones, skin health and even mental wellbeing.

learn more
MIND MIND
SKIN SKIN
IMMUNITY IMMUNITY
DIGESTION DIGESTION
HORMONES HORMONES
learn more

our unique formulation.

Our capsule contains 11 unique bacterial strains from 7 different species. They have each been carefully selected and are all trademarked and registered. In amongst them, we are proud to include Lactobacillus acidophilus NCFM, the world's most researched strain of acidophilus.

Paired with FOS fibre and key nutrients, all contained within our state-of-the-art duo cap, we ensure the targeted delivery of ingredients to the right place, at the right time.

LEARN MORE
15 active ingredients.
fos

Fructooligosaccharides (FOS) act as the food and energy source for the live bacteria in our capsule. Housed within the liquid layer, it is released first to support the function of the live inner core.

READ MORE ON FOS
Bifidobacterium lactis HN019
12.88 billion CFU
This particular bifidobacterium has many clinical trials exploring its ability to help with digestive issues like constipation.
View Studies
Del Piano, M., Carmagnola, S., Anderloni, A., et al. (2010).

The Role of Probiotics in Improving Gut Health in Healthy Volunteers with Evacuation Disorders and Hard Stools. Journal of Clinical Gastroenterology, 44(Suppl 1), S30-S34.

READ MORE ON HN019
Waller, P.A., Gopal, P.K., Leyer, G.J., et al. (2011).

Dose-response effect of Bifidobacterium lactis HN019 on whole gut transit time and functional gastrointestinal symptoms in adults. Scandinavian Journal of Gastroenterology, 46(9), 1057–1064.

READ MORE ON HN019
Lactobacillus acidophilus NCFM
10 billion CFU
We are proud to include the world's most researched strain of acidophilus. Many studies explore its link with IBS-related pain, bloating, immune support, cognition and skin health.
View Studies
Magro, D.O., de Oliveira, L.M., Bernasconi, I., et al. (2014).

Efficacy of probiotic supplementation for constipation relief. International Journal of Gastroenterology and Hepatology, 59(1), 15-19.

READ MORE ON NCFM
Paineau, D., Carcano, D., Leyer, G., et al. (2008).

Effects of seven potential probiotic strains on specific immune responses in healthy adults: a double-blind, randomized, controlled trial. Journal of Clinical Immunology, 28(6), 542-551.

READ MORE ON NCFM
Lactobacillus plantarum LP-115
8 billion CFU
LP-115 has been tested on its potential to promote beneficial effects in the immune system and alleviate intestinal disorders.
View Studies
Tian, L., Zhao, R., Xu, X. et al. 2023.

Modulatory effects of Lactiplantibacillus plantarum on chronic metabolic diseases. Food Science and Human Wellness.

READ MORE ON LP-115
Lactobacillus rhamnosus GG
7.11 billion CFU
Lactobacillus rhamnosus GG appears in trials on conditions such as diarrhea, inflammatory bowel disease, atopic dermatitis, and even dental caries.
View Studies
Steele, C. (2022).

Lactobacillus rhamnosus GG: a review of clinical use and efficacy. Nutr. Med. J., 1(3), 70-116.

READ MORE ON GG
Bifidobacterium breve BB18
4.66 billion CFU
Bifidobacterium breve Bb-18 has been tested for its role in supporting the maturation and maintenance of the immune system within the gut. Research indicates that it is associated with increased resistance to infections and enhanced immune activity.
View Studies
Arreola, S. L., Intanon, M., Suljic, J., et al. (2014).

Two β-Galactosidases from the Human Isolate Bifidobacterium breve DSM 20213: Molecular Cloning and Expression, Biochemical Characterization and Synthesis of Galacto-Oligosaccharides. PLOS ONE, 9(8), e104056.

READ MORE ON BB18
Bifidobacterium lactis BL04
3.25 billion CFU
This strain has been tested in a broad range of areas, including improving intestinal barrier function, regulating immune defence, reducing the incidence of diarrhoea and associations with the gut-brain axis.
View Studies
Wang Y, Li N, Yang J.J. et al. 2020.

Probiotics and fructo-oligosaccharide intervention modulate the microbiota-gut brain axis to improve autism spectrum reducing also the hyper-serotonergic state and the dopamine metabolism disorder.

READ MORE ON BL04
Forssten S.D., Yeung N., Ouwehand A.C. 2020.

Fecal Recovery of Probiotics Administered as a Multi-Strain Formulation during Antibiotic Treatment.

READ MORE ON BL04
Lactobacillus rhamnosus HN001
1.2 billion CFU
Lactobacillus rhamnosus HN001 has demonstrated potential to enhance immune function and increase natural cellular immune responses. It has also demonstrated potential to improve skin conditions like eczema.
View Studies
Barthow, C., Hood, F., Crane, J., et al. (2022).

A randomised controlled trial of a probiotic and a prebiotic examining metabolic and mental health outcomes in adults with pre-diabetes. BMJ Open, 12:e055214.

READ MORE ON HN001
Bonfrate L, Di Palo DM, Celano G, et al.

Effects of Bifidobacterium longum BB536 and Lactobacillus rhamnosus HN001 in IBS patients. Eur J Clin Invest. 2020;50(3):e13201.

READ MORE ON HN001
Bifidobacterium bifidum BB-06
0.88 billion CFU
Bifidobacterium bifidum BB-06 has been tested mostly around its ability to support the gut-brain axis and gut-skin axis, two growing research areas in gut health.
View Studies
Ferro, M., Charneca, S., Dourado, E., Guerreiro, C.S., Fonseca, J.E. (2021).

Probiotic Supplementation for Rheumatoid Arthritis: A Promising Adjuvant Therapy in the Gut Microbiome Era. Front. Pharmacol., 12:711788.

READ MORE ON BS01
Lacticaseibacillus paracasei LPC37
0.88 billion CFU
Lacticaseibacillus paracasei Lpc-37 is well-researched for its role in supporting digestive health and has also been studied for its potential to help manage the psychological response to stress.
View Studies
Ouwehand AC, DongLian C, Weijian X, et al.

Probiotics reduce symptoms of antibiotic use in a hospital setting: a randomized dose response study. Vaccine. 2014;32:458-463.

READ MORE ON LPC-37
Bifidobacterium longum BL05
0.88 billion CFU
Bifidobacterium longum BL-05 has more limited research but has shown promising results, including measurable changes in gut microbiome composition, improvements in symptoms like constipation, bloating, diarrhoea, and abdominal discomfort.
View Studies
Chen, S., Jiang, P.-P., Yu, D., et al. (2021).

Effects of probiotic supplementation on serum trimethylamine-N-oxide level and gut microbiota composition in young males: A double-blinded randomized controlled trial. Eur. J. Nutr., 60(2), 747–758.

READ MORE ON BL05
Lactobacillus acidophilus LA14
0.26 billion CFU
Lactobacillus acidophilus LA14 has been tested on its role in immune function and modulation, and some limited tests into its ability to improve cognitive function.
View Studies
De Nunzio, C., Bartoletti, R., Tubaro, A. et al. (2021).

Role of D-Mannose in the Prevention of Recurrent Uncomplicated Cystitis: State of the Art and Future Perspectives. Antibiotics, 10, 373.

READ MORE ON LA14
+7 more strains