A container of Men's 3-in-1 Pre+ Post+ Probiotic stands upright, promoting gut health. An orange, sphere-shaped gummy sits in front, echoing the product's blue and orange design focused on digestive wellness.

Gummy Men's 3-in-1 Pre+ Post+ Probiotic

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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30 Servings Per Bottle

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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, 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.
Supplement Facts
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:

  • Savings every single month.
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  • Cancel anytime.
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Infographic titled "Nourish Your Gut with 3 Powerful Strains" explains prebiotics, probiotics, and postbiotics for digestive wellness. Three icons and descriptions accompany each term, with lab equipment and Men&
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An infographic showcases Men’s 3-in-1 Pre+ Post+ Probiotic supplement facts, gut health support, vegan and non-GMO status, Clean Label Project Purity Award, a full ingredient list, and no top 9 allergens.
A container of first day mens gut health pre, post, and probiotic supplement sits on a marble bathroom countertop, with a white vase and plant in the background.

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.

A container of First Day mens pre, post, and probiotic gummies lies on a towel next to a white cup holding a toothbrush, a soap dispenser, two gummies, and green leaves.

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®!

A container of first day mens gut health pre, post, and probiotic supplement sits on a marble bathroom countertop, with a white vase and plant in the background.

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.

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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.

Brandi C.

Amarillo, TX

"The kids honestly ask me for their vitamins in the morning. Can you say uhhamazing!!"

Rachel Y.

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.

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.

Kasey L.

Rochester, NY

A container of first day 4-in-1 Pre, Post, Probiotics for men rests on a surface of dark, uneven volcanic rocks. The packaging is blue and orange with white and orange text.

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.

Benefits comparison chart for Men's 3-in-1 Pre+ Post+ Probiotic gummies: earns checkmarks for clinically-studied strains and low sugar. Competing brands get red X marks in these categories. Supports gut health and digestive wellness.

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, MHSYale University

    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, ScDHarvard University

    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.
Trusted by over 800,000 parents. 97% of customer prefer First Day over other vitamin brands they've tried. Based on study of 264 customers.

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.

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.

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:

More questions? Find answers on our FAQ page.

Ready to Start Your Health Journey?

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  • 5 stars: 40 (95%)
  • 4 stars: 1 (2%)
  • 3 stars: 1 (2%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
L
Liz L.
It works

I've been taking women's probiotics for a few months now, and the results have been amazing. My stomach no longer feels bloated or uncomfortable, and I feel much cleaner and healthier overall. I've also noticed a significant improvement in my mood—I'm much calmer and more contented than before.

User picture
T
Tiffany
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.

J
Jeff
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

S
Shannon T.
Awesome Vitamins

These vitamins taste so good. I purchased for my whole family. They energy provide as what we needed.

N
Nehemiah P.
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.

J
Jen S.
Happy with this purchase.

Feeling better after the first week of taking First Day!

G
Gary P.
Love It!!

So far so good. Definitely love the taste. Noticed myself being more regular now also. Just finished my 1st month

N
Nathanael V.D.
Comes as advertised

I’ve looked for a long time for something that helps with some indigestion that I’ve dealt with for years, and this has helped more than anything I’ve tried. I would recommend it to anybody.

W
Wlliam A.
Best for your gut.

This is the absolute best probiotic, prebiotic combo and best tasting daily, pick me up. And also I feel it's been so much better, no gut pain..

J
J.N.
Better than expected

Love the Way I feel, better than I expected. I hate taking numerous pills, the gummy makes it easy.

A
Andrew S.
Gummies

I’m loving the gummies so far! They give me energy that I have been looking for!

c
craig w.
First day

Only been using the product for a week now but really enjoying these gummies they have a good flavour

J
Jennifer M.
Perfect Match

First Day Men’s Multi is a perfect match for me. Before using them I used to take mega doses of vitamins. You would think taking large amounts made me feel good…. But actually it was quite the opposite. And I never even knew until taking First Day supplements how good you could feel. I have plenty of energy during the day , and I sleep well at night. Another great thing about these vitamins is that they use all the natural forms … none of that synthetic crap you find in other brands. The formulations also works well, with just the right amount of nutrients to replace what your not getting in your diet. I highly recommend their supplements for the whole family! My family loves them and I’m sure yours will too!

S
Saul f.
Super food the gut the best probiotic product I have ever tried in my whole life. A life changer!!!

I have felt such a relieve from the first week after taking men’s gut guardian. From bloating ease to bowel movement; such a change. I really recommend it. Actually I am doing this review on vacation in South America, and every time I visit I get stomach aches. But now that I have brought men’s gut guardian with me I am so happy I did. Best product out there.

S
Saul f.
Super food the gut the best probiotic product I have ever tried in my whole life. A life changer!!!

I have felt such a relieve from the first week after taking men’s gut guardian. From bloating ease to bowel movement; such a change. I really recommend it. Actually I am doing this review on vacation in South America, and every time I visit I get stomach aches. But now that I have brought men’s gut guardian with me I am so happy I did. Best product out there.

H
Heather G.
Great product!!

My husband struggles with gut health issues. Since taking these men's gut health vitamins he has had alot less problems in the bathroom.

H
Heather G.
Great product!!

My husband struggles with gut health issues. Since taking these men's gut health vitamins he has had alot less problems in the bathroom.

G
Grant S.
So far so good

I can definitely tell a difference since starting these. I am excited to see how my health will improve with more time.

G
Grant S.
So far so good

I can definitely tell a difference since starting these. I am excited to see how my health will improve with more time.

S
Sébastien T.
Does as advertised.

I’ve been using this product for 2 weeks and already shows a net benefit. My bowl movements are a lot better and a lot less bloating in the region of 70% better.

Thank you for a great product and it tastes good as well, a welcomed benefit as well.

N
Nathan
Nice but no change

They are nice but I have not seen any change in how I feel or less bloating.

S
Sal Z.
Men's probiotics

Everything moving along just fine

S
Sal Z.
Men's probiotics

Everything moving along just fine

T
Tim C.
Great

These gummies taste great and I feel better

J
Jamal C.
5 stars⭐️⭐️⭐️⭐️⭐️

It’s worth every penny ,and I’ll be ordering more in a week ,Thank you So Much #FirstDay….get yours I’m already working towards my second purchase

J
Jamal C.
5 stars⭐️⭐️⭐️⭐️⭐️

It’s worth every penny ,and I’ll be ordering more in a week ,Thank you So Much #FirstDay….get yours I’m already working towards my second purchase

D
Dajuan W.
Men’s Gut guardian

Definitely a energy boost and also works wonders on the gut.

D
Dajuan W.
Men’s Gut guardian

Definitely a energy boost and also works wonders on the gut.

C
Christopher R.
Outstanding!

I got these gummies because of a sale that was too good to pass up. These gummies taste incredible and make it easy to stay in a routine of consistently taking them! You will actually WANT to take your vitamins every day! I also got the Gut Guardian and the Magnesium sleep gummies and both are equally as amazing! Give these a try…. You will be so glad that you did!

D
DEAN D.
After a few weeks of taking First Day’s Men’s Multi, I feel great!

I am a male in my early 60’s and suffer from chronic inflammation and osteoarthritis. I have taken daily supplements but found that most of the nutrients from the multivitamins were not absorbed in my body properly. About a month ago, I started taking First Day’s Men’s Multi and Gut Guard(ian) gummies daily. Since taking the daily, my body feels normal and my body and joint aches have diminished to the point I can resume my normal activities. I will definitely continue taking First Day and want to thanks the First Day team for helping giving me back my life!

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.