The Postbiotic Era
Is Here.

Whole-body health starts in the gut. Fast-acting postbiotics help you feel lighter, clearer, and more balanced - with results probiotics can’t deliver.
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How It Works

Trust your gut.
It’s your second brain.

When it’s off, everything is off. SecondKind restores balance for whole-body health.

Your gut produces

91%

of your
serotonin

50%

of your
dopamine

74%

of your
immune system

The Postbiotics

Breakthrough Formulations

Gut Balance

with BiomeBalance™

Targeted Postbiotics that reduce bloat, rebalance digestion, and support your immune defenses.

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Mood Balance

with BiomeBalance™

Targeted Postbiotics that support mood, relieve stress, and restore emotional clarity.

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  • Vegan
  • Clinically tested
  • Non-GMO
  • Clean Label
  • Third Party-Tested
  • Made in the U.S.A.
  • Gluten-Free

Why Postbiotics?

A Trillion Times Better

Postbiotics are the real outcome you wanted in the first place.

See the Science

Prebiotics

The fertilizer.
Live bacteria you try to add, but fragile, inconsistent, and often don’t survive digestion.

Probiotics

The seed.
Fibers that feed bacteria, but only work if the right microbes are there.

SecondKind Postbiotics

The harvest.
Trillions of beneficial compounds your body actually needs, ready to work, stable, fast, and effective.

See the Science

Our Patented Postbiotic Complex

Introducing BiomeBalance™

From mood and focus to sleep, stress, and immunity, your gut is the command center of it all. That’s why we created BiomeBalance™, an advanced formula powered by clinically studied Postbiotics, designed to help you feel lighter, clearer, and more like yourself – from the inside out.

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Gut

Digestion, debloat, 
and balance.

Mood

Clarity, calm, focus.

Immunity

Strengthens defenses
where it matters.

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Why SecondKind

You’ve tried probiotics.
Now try what actually works.

Grounded
in research

→ Made with clinically studied,
backed by science.

→ Made with clinically studied,
backed by science.

Feel it in days or weeks,
not months

→ Many notice a difference
within the first bottle.

→ Many notice a difference
within the first bottle.

No fillers,
no fluff

→ Clean formulas with only
targeted ingredients.

→ Clean formulas with only
targeted ingredients.

The Science

Two Brains.
One Truth.

SecondKind isn't another probiotic. It's a Postbiotic. It's what comes after. The ready-to-use, already active nutrients your body actually uses. Fast-acting, shelf-stable, and clinically studied, they support mood, immunity, and digestion in a way pre and probiotics can't.

See How It Works
See How It Works
Discover Our Story

Our Story

This
started with our
family

We tried everything - probiotics, powders, endless fixes, but nothing worked. Then we discovered postbiotics: science-backed compounds your body actually uses to feel clear, calm, and balanced again.

— Remy, Founder

Discover Our Story

Proven Results

Trusted Science

See The Science

Gut health isn’t a niche topic anymore - it’s whole-body health, rooted in neuroscience and immunology. In clinical research, postbiotics are emerging as a direct, bioavailable way to influence gut health and systemic balance.

— Dr. Zachary Schwartz, MD, Family Medicine

As a holistic nutritionist, I’ve seen countless gut supplements offer fake promises and deliver nothing…. ineffective results. SecondKind stands apart because it’s postbiotic-first - finally, a solution that aligns with what the science tells us the body truly needs.

— Dr. Nancy Lin, PhD, Holistic Nutritionist

By centering its formulas around postbiotics, SecondKind is translating the latest gut-brain research into something accessible for consumers. It reflects a more modern, science-forward understanding of digestive health.

 — Dr. Stuart Weinberger, MD, Gastroenterologist

SecondKind Edit

Notes from the Inside

what are postbiotics? | a complete guide

Postbiotics 101: A Complete Guide to Postbiotics

When it comes to gut health, you’ve probably heard of probiotics and prebiotics. But a new kind of gut-supporting compound is changing the conversation: postbiotics. These fast-acting, clinically studied nutrients...
Read more
gut health and mood - woman in a good mood

Mood-Boosting Supplements: How Your Gut Holds the Key to Emotional Balance

If you’ve ever felt “off” - moody, foggy, or just not yourself - your gut might be trying to tell you something. The truth is, your mood doesn’t start in...
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The postbiotic benefits of BiomeBalance to balance microbiome, gut for immunity and debloat

BiomeBalance™: All-Natural Gut Health Supplement Formula That Works from the Inside Out

You’ve tried probiotics. You’ve adjusted your diet. Maybe you’ve even given up, wondering if your gut will ever feel normal again. We get it. That’s why we created BiomeBalance™, our patented...
Read more
what are postbiotics? | a complete guide

Postbiotics 101: A Complete Guide to Postbiotics

When it comes to gut health, you’ve probably heard of probiotics and prebiotics. But a new kind of gut-supporting compound is changing the conversation: postbiotics. These fast-acting, clinically studied nutrients...
Read more