Probiotic Gummies for Men | Men's 3-in-1 Pre+ Post+ Probiotic | First Day
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ToddlersAges 2 – 3
\ \ Toddlers' Multivitamin\ \ Support for development when it matters most.](https://firstday.com/products/the-no-junk-toddlers-multivitamin) \ \ Toddlers' Probiotic+\ \ For softer, easier to pass stools.](https://firstday.com/products/toddlers-3-in-1-probiotic)
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\ \ Kids' Multivitamin\ \ Daily nutrition to support mood & behavior.](https://firstday.com/products/kids-enrichment-vitamin) \ \ Kids' Probiotic+\ \ To help improve immunity, digestion & oral health.](https://firstday.com/products/kids-3-in-1-pre-post-probiotic-swap) \ \ Kids' Magnesium\ \ Helps kids fall asleep, and stay asleep during the night.](https://firstday.com/products/kids-calming-magnesium) \ \ Kids' Brain Support\ \ Support for learning, attention & focus.](https://firstday.com/products/kids-daily-focus)
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\ \ Teens' Multivitamin\ \ Daily support for motivation & mood.](https://firstday.com/products/teens-kickstart-vitamin) \ \ Teens' Probiotic+\ \ Gut health support for immunity & skin health.](https://firstday.com/products/first-day-teens-3-in-1-pre-post-probiotic) \ \ Teens' Magnesium\ \ Helps teens wind down & sleep through the night.](https://firstday.com/products/teens-calming-magnesium) \ \ Teens' Brain Support\ \ Support for memory, focus & learning.](https://firstday.com/products/teens-daily-focus)
WomenAges 18+
\ \ Women's Multivitamin\ \ All-day support for women.](https://firstday.com/products/womens-supercharge-vitamin) \ \ Women's Probiotic+\ \ For digestion, bloating & feminine health.](https://firstday.com/products/first-day-womens-3-in-1-pre-post-probiotic) \ \ Women's Magnesium\ \ Helps calm the body after a busy day.](https://firstday.com/products/womens-calming-magnesium) \ \ Women's Brain Support\ \ Support for memory & brain fog.](https://firstday.com/products/womens-daily-focus)
MenAges 18+
\ \ Men's Multivitamin\ \ Power-packed nutrition for men.](https://firstday.com/products/mens-provisions-vitamin) \ \ Men's Probiotic+\ \ Support for digestion and muscle recovery.](https://firstday.com/products/mens-gut-guardian) \ \ Men's Magnesium\ \ Helps battle stress at the end of the day.](https://firstday.com/products/mens-calming-magnesium) \ \ Men's Brain Support\ \ Support for memory and brain fog.](https://firstday.com/products/mens-daily-focus)
About Us Our Ingredients Our Science Heavy Metals & Pesticides 2026 Hidden Health Crisis Report Vanishing Nutrients Vitamin Overconsumption Blog Is Your Family Nutrient Deficient?
Men's 3-in-1 Pre+ Post+ Probiotic Gummy 3-in-1 For Improved Immunity & Recovery
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The World’s first Men’s 3-in-1 tribiotic designed with clinically studied Pre+ Post+ and Probiotics. Supports digestion, strength, power, and athletic performance.
Flavor: Tropical
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Ingredients
Designed with potency in mind! We use scientifically studied strains for the most impact on gut health and wellness.
Livaux® (Prebiotic): Clinically studied prebiotic that helps increase probiotics in the microbiome, promote regular bowel movements, and support the relief of constipation.
IS-2® (Bacillus coagulans Probiotic): Clinically studied probiotic that supports digestion, protein absorption, muscle strength and power, and dental health to help fight plaque-induced gingivitis.
IMMUSE™ (heat-treated Lactococcus lactis strain Plasma Postbiotic): Clinically studied postbiotic shown to support athletic performance, immunity, and help fight fatigue.
Other Ingredients: Organic Tapioca Syrup, Organic Cane Sugar, Water, Pectin, Natural Flavors, Citric Acid, Natural Colors.
Free From The Top 9 Allergens: We are dairy-free, soy-free, egg-free, gluten-free, peanut-free, tree nut-free, fish-free, shellfish-free, and sesame-free.
Supplement Facts
Subscription Details
You'll receive a stylish refillable bottle on your first order, then receive our eco-friendly refill pouches every 30 days on a physician-recommended schedule.
Plus, you'll receive these benefits:
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To support local nonprofits across the country, First Day will within 90 days make a donation to PayPal Giving Fund (PPGF) an IRS-registered 501(c)(3) charity, to benefit your chosen charity, subject to PPGF’s terms. First Day will cover all applicable processing fees so that 100% of your donation reaches the chosen nonprofit as unrestricted funds. PPGF typically grants funds to recommended charities within 15-45 days. In the rare event PPGF can’t fund the chosen charity, it will reassign the funds to a similar charity. Since the donation is made by First Day, the charity will not receive your information and you will not be entitled to a tax deduction.
Ready For Liftoff
Feeling low on energy? Drained during workouts? Then it’s time for a gut check. An imbalanced gut can hinder performance and nutrient absorption, leaving you sluggish.
That’s why the World’s First 3-in-1 Pre+ Post+ Probiotic, Mens Gut Guardian, helps rebalance your gut.
Real Wholesome®
Real Wholesome®.
Real results you can feel.
No fillers, fake sugars or fad ingredients with wild claims.
Refillable packaging for a healthier planet
Research-backed & clinically proven.
Vegan. Cruelty Free. Non GMO. Free of allergens, artificial colors & flavors.
Tested & loved by picky kids (and adults)
Meticulously sourced for highest quality & safety.
Repeatedly tested for potency & purity.
The Powerful Trifecta of Tribiotics
Our powerful 3-in-1 combination of prebiotics, probiotics and postbiotics work together to promote a healthy gut microbiome, which is essential for maintaining good health in adult men. A healthy gut microbiome plays a key role in immunity, recovery, respiratory health and heart health - and can also help prevent a variety of health issues, including allergies, asthma, eczema and obesity.
Probiotics
Crushing those workouts but not seeing results? Blame it on the gut! An imbalanced gut doesn’t properly absorb nutrients, protein, or BCAAs... CRUCIAL for building muscle and strength.
That’s why Mens Gut Guardian includes the clinically proven probiotic, IS-2®. This game-changing addition to your routine supports muscle strength, power, and protein absorption.
Make your workouts WORK HARDER with IS-2®!
Prebiotics
Struggling to stay regular? This could be why! Good bacteria in the gut need “fuel” (aka prebiotics) to thrive.
Enter Livaux®, a clinically studied prebiotic. Livaux® helps relieve constipation and supports digestion, colon health, and regular bowel movements.
With Livaux®, you can cut down on bathroom time and say goodbye to the bloat.
Postbiotics
You’ve got enough on your plate. So by the time the workday is over, there's nothing left in the tank for a decent workout.
That is, unless you have the energizing postbiotic, IMMUSE®. This postbiotic is clinically proven to support energy, athletic performance, and fight fatigue. So skip the sluggishness and fuel your workouts from start to finish with IMMUSE®.
Just The Good Stuff
Packed with key active ingredients to support your health & well-being.
Livaux® (Prebiotic)
250mg
Supports gut health, regular digestion, and a healthy microbiome.
Gut
Immunity
IS-2® (Probiotic)
50mg
Supports digestion, protein absorption, and muscle strength
Gut
Muscle
IMMUSE™ (Postbiotic)
36mg
Supports immunity, athletic performance, and helps fight fatigue.
Immunity
Energy
1,000,000+ happy customers
"I love how simple the ingredients are to understand. As a parent, it's a no-brainer !"
Brandi C.
Amarillo, TX
"The kids honestly ask me for their vitamins in the morning. Can you say uhhamazing!!"
Rachel Y.
Montgomery, AL
"Every ingredient in these vitamins are beneficial and the added ingredients have no toxic effect- which is something you don’t find in other brands."
Jamie C.
Ada, OK
"First Day will be part of our morning & night routine for a very long time. So happy I stumbled upon them and LOVE the auto-ship subscription option!"
Kasey L.
Rochester, NY
These tribiotic gummies include Pre+ Post+ and Probiotics to support:
Digestion – Struggle to stay regular? Then support regular bowel movements, digestion, and colon health with a science-based tribiotic.
Energy – Fight fatigue and fuel your workouts with energy support.
Athletic Performance – Ramp up your workouts by supporting exercise performance.
Nutrient Absorption – Supercharge your body's ability to absorb nutrients.
Muscle Strength And Power – Boost results by supporting strength, power, and protein absorption.
Immunity – Skip the sick days and support year-round health.
Dental Health – Fight plaque-induced gingivitis and bad breath.
What Sets First Day Apart
Over 1 million families have made the switch to First Day, and it is easy to see why when competitors take so many shortcuts.
Our Scientific Advisors
Dr Lei Chen, MD, MHS
Yale University
A renowned pediatrician who works at Yale University. In 1997, he graduated with his Medical Degree from New York University. He spent his time at the Yale School of Medicine, as well as the Yale-New Haven Children's Hospital. He also graduated with a Masters of Health Science from the Yale School of Medicine in 2010.
Dr. Ed Giovannucci, MD, MPH, ScD
Harvard University
A professor of Nutrition and Epidemiology at the Harvard School of Medicine. In 1984, Dr. Giovannucci graduated with his medical degree from the University of Pittsburgh. He then spent the next 8 years at Harvard, working for his Doctor of Science Degree. Since then, he has climbed to the top of his field.
45 Day Money-Back Guarantee
We're confident this is the best vitamin you'll ever try. But we understand you may be skeptical. So give it a try...worry-free! If you're still not happy, just send it back.
Men's 3-in-1 Pre, Post, Probiotics FAQs
What's are the ingredients?
Designed with potency in mind! We use scientifically studied strains for the most impact on gut health and wellness.
Other Ingredients: Organic Tapioca Syrup, Organic Cane Sugar, Water, Pectin, Natural Flavors, Citric Acid, Natural Colors.
Free From The Top 9 Allergens: We are dairy-free, soy-free, egg-free, gluten-free, peanut-free, tree nut-free, fish-free, shellfish-free, and sesame-free.
Why do you have less than 100% of daily values?
Remember the old adage "more isn't always better"? Many vitamins today use cheap chemicals that our bodies can't absorb in amounts that are much higher than we actually need! In the long term, taking these sorts of vitamins can be harmful to health because our bodies have a tough time getting rid of the excess.
Take plants as an example. Overwatering your plants can damage their roots, wilt the leaves, and ruin their growth. That's why First Day focuses on being a nourishing vitamin filling in the gaps, not overloading you with nutrients.
So, we've consciously formulated our vitamin around what we most commonly lack. Then we made our gummy to fill the gaps in our everyday needs with the finest ingredients.
What else is different about First Day?
We set out by asking the unaddressed questions in the industry. What are supplements really doing for us? Why are they made the way they are?
We found the average multivitamin uses outdated science from 50 years ago.
To separate truth from fiction, our team of experts investigated thousands of clinical studies. That’s why we use the latest science and source the most absorbable ingredients from all around the world so your vitamins are actually working for you and your health.
Should I subscribe if I've never tried First Day before?
Healthy habits are hard to start let alone maintain! We wanted to make it as simple as one-click to building healthy foundations. With your subscription, you get a discount on every order for being a loyal First Day family member! Plus, cancelling a subscription is easy.
For every order, we also have a satisfaction guarantee so you can rest assured knowing we'll always have your back!
Which scientific studies does First Day look at?
Micronutrients, absorption rate, and more! We've combed through the scientific studies so that you don't have to. But if you want to peruse, check out these scientific studies for yourself:
- National Center for Chronic Disease Prevention and Health Promotion, et al. - Vital Signs: Fruit and Vegetable Intake Among Children — United States, 2003–2010
- Department of Molecular Biology, Pusan National University, et al. - Folic acid is necessary for proliferation and differentiation of C2C12 myoblasts
- Austin J Cerebrovasc Dis Stroke - Sulforaphane Protects against Brain Diseases: Roles of Cytoprotective Enzymes
- Department of Pathology, University of Otago, et al. -Vitamin C and Immune Function
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences - Fruit and Vegetable Intake and Mental Health in Adults: A Systematic Review
- Program in International and Community Nutrition, Nutrition Department, University of California - The challenge to reach nutritional adequacy for vitamin A: β-carotene bioavailability and conversion--evidence in humans
- Vitamin and Mineral Nutrition Laboratory, Beltsville Human Nutrition Research Center - The bioavailability to humans of ascorbic acid from oranges, orange juice and cooked broccoli is similar to that of synthetic ascorbic acid
- Institute of Biochemistry, Life Sciences Center, Vilnius University - Bioavailability of Different Vitamin D Oral Supplements in Laboratory Animal Model
- Institute of Human Nutrition Sciences, Warsaw University of Life Sciences - Tocopherols and Tocotrienols—Bioactive Dietary Compounds; What Is Certain, What Is Doubt?
- Division of Nephrology, RWTH Aachen University - Vitamin K: Double Bonds beyond Coagulation Insights into Differences between Vitamin K1 and K2 in Health and Disease
- National Institute of Health - Vitamin B1 (Thiamine)
- National Institute of Health - Riboflavin Fact Sheet for Health Professionals
- University of Medical Sciences, Isfahan, Iran, et al. - Pyridoxal 5 Phosphate (P5P): Highly Bioavailable Vitamin B6
- Institute of Nutrition and Food Sciences, University of Bonn - Folic acid and L-5-methyltetrahydrofolate: comparison of clinical pharmacokinetics and pharmacodynamics
- Cristiana Paul, MS and David M. Brady, ND, DC, CCN, DACBN - Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphisms
- National Institute of Health - Biotin Fact Sheet Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphisms for Health Professionals
- Department of Physiology, School of Medicine, Dokuz Eylul University, et al. - Timeline (Bioavailability) of Magnesium Compounds in Hours: Which Magnesium Compound Works Best
- Human Nutrition Laboratory, Institute of Food, Nutrition and Health, Swiss Federal Institute of Technology - Zinc absorption by young adults from supplemental zinc citrate is comparable with that from zinc gluconate and higher than from zinc oxide
More questions? Find answers on our FAQ page.
Ready to Start Your Health Journey?
Customer Reviews
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Customers say
Customers praised this 3-in-1 probiotic for digestive relief, with shoppers reporting reduced bloating, improved regularity, and increased energy. Many noted "great taste" making daily use easy. One customer said it's "the best probiotic I have ever tried." However, one shopper saw no change in bloating after use.
AI-powered review summary based on recent customer reviews
Review highlights
“Best product out there. A life changer!”More“These taste great and have slowly helped my stomach and digestion!”More“This has helped more than anything I've tried.”More
Tiffany
Verified
02/26/2026
Yummy Vitamins
Love being able to get all our family's vitamins in one place. The monthly autoship is great, so we never run out!!! Whole family enjoys the taste.
Review for
Men's 3-in-1 Pre+ Post+ Probiotic Pouch Refills
Jeff
Verified
07/20/2025
Finally
So far I haven’t been able to find something that has helped my stomach until l now! These taste great and have slowly helped my stomach and digestion! Highly recommend this product
Shannon T.
Verified
07/13/2025
Awesome Vitamins
These vitamins taste so good. I purchased for my whole family. They energy provide as what we needed.
Nehemiah P.
Verified
07/07/2025
Men's Gut Pre+ Post+ Probiotic Add-On
Good so far. Can serve as a good kick start to the day. Helps with energy in the mornings.Taste is pretty good as well.
Review for
Men's Gut Pre+ Post+ Probiotic Add-On
Jen S.
Verified
06/30/2025
Happy with this purchase.
Feeling better after the first week of taking First Day!
Review for
Men's Gut Pre+ Post+ Probiotic Add-On
1 We offer a 45-day satisfaction guarantee for returns. It covers 45 days starting from the day that you place an order and includes only the very first purchase of any product so that families can try our gummies - for any reason you aren't happy with your vitamins. Please note that we will refund up to $100 so that you can try up to 3 bottles of our gummies risk free. If you would like to order more than 3 bottles in your first order, we recommend that you ordering less so that your family can try them first. Thanks so much for your understanding!
\\ Compared with: Flintstones Vitamins Chewable Kids Vitamins; Nordic Naturals Nordic Berries; SmartyPants Kids Formula
Livaux® is a registered trademark of Anagenix IP Ltd.
SNZ 1969® is a trademark of Sanzyme Biologics Private Ltd.
Suntheanine® is a registered trademark of Taiyo International, Inc.
Cognizin® is a registered trademark of Kyowa Hakko Bio Co., Ltd.
FloraSMART® is a registered trademark of Anderson Advanced Ingredients
Affron® is a registered trademark of Pharmactive Biotech Products, S.L.U.
Zembrin® is a registered trademark of HG&H Pharmaceuticals (Pty) Limited.
Unique IS2 Bacillus Coagulans® is a registered trademark of Unique Biotech Ltd.
OPTIBIOME® is a registered trademark of BIO-CAT, Inc.
OPTIBIOME BS50® is a trademark of BIO-CAT, Inc.
Immuno-LP20 is a trademark owned by HOUSE FOODS GROUP INC.
IMMUSE is a clinically researched lactic acid bacteria developed by Kirin Holdings Company, Ltd.
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# Are you sure you want to remove this product?
Keep ProductsRemove Products
FrontrowMD and the clinicians
[Learn more about FrontrowMD in a new tab](https://frontrowmd.com/?&utm_medium=referral&utm_campaign=client_referrals&utm_source=First%20Day)
Who is FrontrowMD?
FrontrowMD is an independent, third-party platform on a mission to make it easier to discover health products you can trust.
Here’s how: first, we make it easy for clinicians to share discounts on their own selection of health products to help their patients. We often hear that our clinician partners are worried about patients spending their hard-earned money on products that may not be best for them.
Then, we digitally track which products our clinicians include on their patient discount pages and display that data to you, verifying that medical experts are choosing to share this product and making it easier to discover the right product for you.
Who / how many clinicians share this?
Clinicians sharing this product include doctors, nurse practitioners, and physician associates. Right now, 444 clinicians are including this product on their personalized patient discounts page, out of hundreds of product options.
Group practices often request to collaborate on one page instead of setting up separate free pages (this way, it’s easier for patients at a medical practice to shop through a single page).
Below, you can see the names of clinicians or practices sharing this product, including how many clinicians chose to collaborate at that practice to sum up the total number of clinicians sharing this product.
What’s “Clinicians’ Choice” / “share”?
Clinicians have the choice to add / remove any health product (either individually, or often in bulk) to their patient discounts pages whenever they would like.
Therefore, FrontrowMD defines a product as being “shared” or as a “Clinicians’ Choice” if that specific product is included in their personalized page and if those clinicians indicated on their “Getting Started” form that they intend to make their page available to patients (like through leaving out ‘Savings Cards’ with QR codes that link to the page), regardless of the number of products they keep / remove, how thoroughly they review each product, and the number of patients who choose to visit these pages.
This is different than a clinician recommending or “prescribing” this product to an individual patient, which clinicians are often less comfortable doing because of liability concerns — clinicians instead often appreciate being able to choose to share a product on their page that is broadly available to all patients.
When you click on 'Preview' below, you’ll be taken to a filtered view of those clinicians’ personalized pages, so you can confirm they included this product. While there, you can even download the “Getting Started” form they submitted by clicking ‘Confirm’ in the full list of clinicians. Only patients of these clinicians can shop on that page.
Are clinicians paid to do this?
No — clinicians are never compensated. This is a free platform for clinicians and patients. These clinicians include products on their personalized discounts pages, which you can preview below, to benefit their patients.
Clinicians who shared this product
For the complete list, [click here](https://app.thefrontrowhealth.com/general-store/all?pid=4213&utm_source=1161&utm_medium=4213&utm_campaign=brands_website&utm_content=modal&spi=true). Numbers below indicate how many clinicians collaborate to share products on a single page at a medical practice.
1
Dr. Christopher Chow
Reseda, CA
[Preview](https://app.thefrontrowhealth.com/provider/CCHOW/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Nancy Esper
Bellaire, TX
[Preview](https://app.thefrontrowhealth.com/provider/NESPER/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Muhammad Raza Aftab
Chicago, IL
[Preview](https://app.thefrontrowhealth.com/provider/MAFTAB/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Paul Feldan
Mt. Laurel
[Preview](https://app.thefrontrowhealth.com/provider/PFELDAN/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Ashley Aya
Jackson, New Jersey
[Preview](https://app.thefrontrowhealth.com/provider/AAYO/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Knotresha Stewart, MD
Dublin, VA
[Preview](https://app.thefrontrowhealth.com/provider/KSTEWART/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
2
Anand Balasubramanian MD
Houston, TX • 2 Providers
[Preview](https://app.thefrontrowhealth.com/provider/ABALASUBRAMANIAN/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Preeti Kallu, MD
Tampa, FL
[Preview](https://app.thefrontrowhealth.com/provider/PKALLU/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Kimberly Rogers, MD
Wilmington, DE
[Preview](https://app.thefrontrowhealth.com/provider/KROGERS2/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
1
Dr. Laura Bonaker
Elmer, New Jersey
[Preview](https://app.thefrontrowhealth.com/provider/LBONAKER/all?preview_store=true&spi=true&utm_campaign=brands_website&utm_content=modal&utm_medium=4213&utm_source=1161&sort=featured&pid=4213)
[See the full list of clinicians and learn more](https://app.thefrontrowhealth.com/general-store/all?pid=4213&utm_source=1161&utm_medium=4213&utm_campaign=brands_website&utm_content=modal&spi=true)
Please consult your own medical provider before buying health products online, as neither FrontrowMD nor our clinician partners are providing medical advice.
[Learn more about FrontrowMD in a new tab](https://frontrowmd.com/?&utm_medium=referral&utm_campaign=client_referrals&utm_source=First%20Day)
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