Mens Gut Guardian

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. 30 day supply of tropical-flavored gummies for ages 18+.


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Better When Combined

Bundle with Men's Multivitamins for +$26 per bottle ($21 in total savings!)

Men's Gut Guardian enhances the body's ability to absorb nutrients from vitamins (and food in general!)

🔥 49+ people choose starter packs every day!

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45 day money-back guarantee1.

Works in tandem with our mens daily multivitamin.

Over 38 million gummies sold in 2023.

Join over 460,000 others who switched to First Day!

Designed with potency in mind! We use scientifically studied strains for the most impact on gut health and wellness.

mens tribotic supplement facts

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, Organic Carnauba Wax

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.

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Receive our eco-friendly refill pouches every 30 days on a physician-recommended schedule.

Plus, you'll receive these benefits:

  • Save an additional 15% every single month.
  • Delivered right to your doorstep for free.
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Mens Gut Guardian
Mens Gut Guardian
Mens Gut Guardian
Mens Gut Guardian
non GMO allergen free probiotic
Mens Gut Guardian

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.


No Gelatin




No Corn Syrup






Made In The USA

These tribiotic gummies include Pre+ Post+ and Probiotics to support:

DigestionStruggle to stay regular? Then support regular bowel movements, digestion, and colon health with a science-based tribiotic.

EnergyFight fatigue and fuel your workouts with energy support.

Athletic PerformanceRamp up your workouts by supporting exercise performance.

Nutrient AbsorptionSupercharge your body's ability to absorb nutrients.

Muscle Strength And PowerBoost results by supporting strength, power, and protein absorption.

ImmunitySkip the sick days and support year-round health.

Dental HealthFight plaque-induced gingivitis and bad breath.

The Powerful Trifecta of Tribiotics

mens probiotic gummy


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®!

mens prebiotic gummy


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.

mens post biotic gummy


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®. 

A complete 3-in-1 approach to support digestion, energy, and athletic performance

A complete 3-in-1 approach to support digestion, energy, and athletic performance




Effectively Dosed For Men

Vegan & Gluten-Free

FirstDay logo. Dark Blue

 Clinically-Proven Strain











Men's Power-Up Starter Pack

Our Mens Gut Guardian + Daily Provision Multivitamins are a nutrition powerhouse!

  • Mens Daily Provision Multivitamins – fills nutrition gaps with 12 organic fruits and vegetables.
  • Mens Gut Guardian Tribiotic – supercharges nutrient absorption from food and vitamins. Also supports digestion, energy, athletic performance, muscle strength and power, and immunity. 

The Mens Power-Up Starter Pack includes a 30-day supply of each, making it easier to cover all your bases at once.

Protect your gut and give your body the nutrients it needs with the Mens Power-Up Starter Pack

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45-Day Money Back Guarantee

You’re going to love these gummies! The energy, digestion support, and muscle-building benefits alone will be a game changer. 

But just for peace of mind, if you don’t like ‘em, let us know and we’ll give you a full refund. 

Our Scientific Advisors

  • Dr. Ed Giovannucci, MD, MPH, ScDHarvard University

    Dr. Ed Giovannucci,MD, MPH, ScD
    Harvard University

    Dr. Giovannucci researches the intricacies of nutrition and lifestyle and is passionate about bringing healthier lifestyles to families everywhere. At home, he has 2 lovely children who love their veggies but also have a soft spot for chocolate!

  • Dr. Lei Chen, MD, MHSYale University

    Dr. Lei Chen,MD, MHS
    Yale University

    Dr. Chen is a professor and a practicing pediatrician in emergency medicine. He's deeply passionate about child healthcare and travels the worldto help bring better access to health for all. He has fast-growing, twin boys who love building kayaks together with him.

men's probiotics faqs

Who should take Mens Gut Guardian?

Our Mens Gut Guardian is crafted for men aged 18 and over, providing essential support for gut and overall health.

Is the product free from common allergens, such as gluten, dairy, or soy?

Yes! Synthetic colors, High-Fructose Corn Syrup, GMOs, Gluten, Eggs, Tree Nuts, Wheat, Peanuts, Artificial Flavors, and Preservatives are a NO-NO here!

Can these be taken with other multivitamins/supplements?

Our Mens Gut Guardian teams up with your body to maintain the smooth operation of your digestive and immune systems. And you can pair it with your current multivitamin for that added kick of goodness!

Do these need to be refrigerated?

Unlike some other probiotics, there is no need to refrigerate these! It's best to store them in a cool, dark place away from sunlight.

What clinical studies or research support the effectiveness of this product?

For Livaux®, we've got two clinical studies: and

For, Bacillus coagulans IS-2®, all of the studies are easily found on their website:

And last but not least, IMMUSE™:

We hope you find the info you're looking for! Let us know if you have more Qs!

What is the full ingredient list?


Livaux® (New Zealand Gold Kiwifruit powder) 250mg
Bacillus coagulans Unique IS-2® (5 Billion CFUs) 50mg
IMMUSE™ (heat-treated Lactococcus lactis strain Plasma) 36 mg

Other Ingredients: Organic Tapioca Syrup, Organic Cane Sugar, Water, Pectin, Natural Flavors, Citric Acid, Natural Colors, Organic Carnauba Wax"

Where are these manufactured?

Made with care right here in the USA, our products are crafted in a top-notch facility that maintains exceptional standards holding both CGMP certification and FDA registration. This just shows how serious we are about quality. We're all about keeping it real! What you see is what you get—no secrets, just clear info about every ingredient in our supplements. 😊

More questions? Find answers on our FAQ page.

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