FitProbio+ | HOWARU® Shape B420 Weight Management Probiotic

Name: FitProbio+
Brand: Fitties
SKU: BIO-LEAN-C30
Price: 59.00 USD
Availability: InStock

One clinically studied strain for healthy body composition.

$59.00

30 servings | $1.96/serving

HOWARU Shape B420, a single clinically studied strain
10 billion CFU, the dose used in clinical research
Supports healthy weight management and body composition
Acid-resistant DRcaps™ deliver it to your gut alive
Vegetarian, gluten-free, dairy-free, made in a cGMP facility

FitProbio+ is one clinically studied probiotic strain, HOWARU Shape B420 at 10 billion CFU, to support healthy weight management and body composition.

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Studied for Body Composition
HOWARU Shape B420 is a single probiotic strain studied in a human trial to support healthy weight management and body composition.
Works Through Your Gut Barrier
The strain supports gut barrier function, which is how it’s thought to support healthy body composition.
Delivered to Your Gut Alive
Acid-resistant DRcaps capsules slow exposure to stomach acid for more targeted release, so the strain actually reaches your gut.
One Strain, Done Right
Not a random blend chasing a high CFU count. One clinically studied strain at the 10 billion CFU dose used in research.

Overhead view of fit female removing packet from box of Fitties FitProbio+

Why the Strain Matters More Than the Count

The probiotic aisle competes on two numbers: how many billion CFUs, and how many strains. Neither tells you whether the product does anything. What matters is the specific strain, and whether it’s been studied for a specific benefit. FitProbio+ is built on one strain, HOWARU Shape B420, studied in a human trial for healthy body composition, at the exact dose used in that research. It’s delivered in acid-resistant capsules so it survives stomach acid, and sealed in nitrogen-purged blister packs so it stays stable. One strain that’s been studied beats ten that haven’t.

Who FitProbio+ Is For

Built for people who want a probiotic with actual clinical backing, not a CFU number on a label.

Who It’s For:
Anyone supporting healthy weight management and body composition
People who want a clinically studied strain, not a random blend
Anyone who cares whether a probiotic survives stomach acid
Who It’s Not For:
Anyone wanting a general digestive or immune probiotic
People looking for a quick weight-loss fix

What’s Inside

One clinically studied strain, the dose used in research, and the delivery and packaging that keep it alive. Here’s what’s in every capsule and pack.

HOWARU Shape B420

A single probiotic strain, Bifidobacterium animalis subsp. lactis B420, at 10 billion CFU, studied in a human trial to support healthy body composition.

Acid-Resistant DRcaps Capsules

Gastro-resistant capsules that slow exposure to stomach acid for more targeted release, so the strain reaches your gut where it works.

Nitrogen-Purged Blister Packs

Each capsule is sealed in a nitrogen-purged blister pack, protecting the strain from the heat, moisture, and oxygen that degrade probiotics.

Formulated to exclude: wheat, gluten, soy, animal and dairy products, fish, shellfish, peanuts, tree nuts, egg, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial sweeteners, and artificial preservatives.

Other ingredients include: microcrystalline cellulose, acid-resistant capsule (hypromellose, gellan gum, and water), ascorbyl palmitate, and silica.

What to Expect From FitProbio+

Body composition changes slowly. FitProbio+ works with consistent daily use over months, alongside healthy habits, not overnight.

Week 1
You’re starting daily intake of a clinically studied strain at the researched dose, delivered in capsules built to survive stomach acid.
Months 1-3
Probiotics work gradually. With consistent daily use, you’re supporting gut barrier function and healthy body composition over time.
Ongoing
A long-game strain, so consistency matters. Steady daily use, alongside a healthy diet and regular activity.

Closeup of Fitties FitProbio+ on kitchen counter with fit male in the background

How to Take FitProbio+

Take one capsule daily with water, any time of day, straight from the blister pack
Once daily, every day
Any time of day, with or without food; daily consistency is what matters for a probiotic

Pro Tip: Take it consistently. Probiotics build their benefit over time, not in a day.

How FitProbio+ Compares

Most probiotics chase big CFU numbers and long strain lists with no clinical proof. FitProbio+ is one studied strain, properly dosed and delivered.

Single clinically studied strain

Studied for body composition

10 billion CFU (research dose)

Acid-resistant DRcaps delivery

Nitrogen-purged blister packs

Vegetarian, dairy-free

Made in USA, cGMP facility

FitProbio+

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FitProbio+

Typical Probiotics

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What People Notice About FitProbio+

See what people are saying

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Where FitProbio+ Fits Your Stack

FitProbio+ supports healthy body composition. Pair it with the right products to round out your daily routine without overlap.

FitWhey+: protein to support lean muscle and body composition.
FitNutrients+: broad daily vitamins and minerals.
FitFuel: daily foundational nutrition.

Find Your Stack

Frequently Asked Questions

What is HOWARU Shape B420?

HOWARU Shape B420 is a specific probiotic strain (Bifidobacterium animalis subsp. lactis B420) studied in a human trial for healthy body composition. FitProbio+ uses it at 10 billion CFU.

How is FitProbio+ different from other probiotics?

Most probiotics are multi-strain blends chasing high CFU counts with no clinical backing. FitProbio+ is one strain studied for a specific benefit, delivered in acid-resistant capsules that survive stomach acid.

How does a probiotic support body composition?

The B420 strain supports gut barrier function, which research links to healthy body composition. It’s been shown to support healthy weight management and the reduction of body fat mass.

Do I need to refrigerate it?

No. Each capsule is sealed in a nitrogen-purged blister pack that protects the strain from heat, moisture, and oxygen, so it stays stable. Store it in a cool, dry place.

When and how should I take FitProbio+?

Take one capsule daily with water, any time of day, with or without food. Consistency is what matters, since probiotics build their benefit over time.

Is FitProbio+ a weight-loss pill?

No. FitProbio+ supports healthy weight management and body composition as part of a healthy diet and lifestyle. It’s not a quick fix, and it works gradually with consistent use.

Is FitProbio+ vegetarian, gluten-free, or dairy-free?

Yes to all three. The strain and capsule are vegetarian, gluten-free, and dairy-free, which is uncommon for probiotics. It’s also made without GMOs and artificial additives.

Can I take FitProbio+ with other supplements or medication?

Generally yes. FitProbio+ pairs well with daily foundational products. If you take medication or have a health condition, check with your healthcare professional first.

Can I stack Fitties products together?

Yes. All Fitties supplements are formulated with complementary ingredient profiles, so they can be used as part of the same daily routine. If you want a ready-made stack, our curated bundles pair the right products for strength, performance, recovery, and overall health so you don't have to guess.

Are Fitties products third-party tested?

Yes. Every Fitties formula goes through independent third-party testing to verify purity, potency, and identity before it ever reaches your hands. No hidden extras. No low-grade shortcuts. Just ultra-premium, research-backed ingredients that are formulated to match exactly what the label says.

Where are Fitties products made?

All Fitties supplements are manufactured in the USA in cGMP-certified, FDA-registered facilities. We don’t outsource quality. We build everything to the highest standard because your health and performance deserve nothing less.

Are Fitties supplements vegan, gluten-free, or allergen-friendly?

Each product is different, and we call out all dietary details clearly on every product page. Many formulas are vegan, gluten-free, dairy-free, or soy-free, and we never use artificial dyes or cheap fillers. If something doesn’t fit your dietary needs, you’ll know upfront.

What Real Users Are Saying

Reviews from athletes and high performers who expect to get what they pay for in their supplements.