Intestinal Fortitude White Center

Do you like our logo? We sure do! Tell the world that you've got what it takes to deal with whatever life throws at you. Tell the world that you've got Intestinal Fortitude. Tell the world that you've got GUTS!

This T-shirt is made of a thicker, heavier cotton, but it's still soft and comfy. And the double stitching on the neckline and sleeves add more durability to what is sure to be a favorite!

• 100% ringspun cotton
• 4.5 oz/y² (153 g/m²)
• Pre-shrunk
• Shoulder-to-shoulder taping
• Quarter-turned to avoid crease down the center

Size guide

	S	M	L	XL	2XL
Length (inches)	28	29 ¼	30 ¼	31 ¼	32 ½
Width (inches)	18	20	22	24	26

Advanced Gut Health Formula – Backed by Science

Science-Backed Ingredients for Optimal Digestion

Science-Backed Formulas Clinically studied ingredients for real results.

Satisfaction Guaranteed 180-day money-back promise for risk-free wellness.

Restore Your Gut Now

Stronger Immunity Supports your body’s natural defenses with colostrum and vitamins.

Gut Health Support Aids digestion and gut lining repair with probiotics and kiwifruit extract.

Natural Energy Provides B vitamins and minerals to fuel daily energy.

Whole Body Wellness Combines antioxidants, honey, and nutrients for overall vitality.

Stronger Immunity Supports your body’s natural defenses with colostrum and vitamins.

Gut Health Support Aids digestion and gut lining repair with probiotics and kiwifruit extract.

Natural Energy Provides B vitamins and minerals to fuel daily energy.

Whole Body Wellness Combines antioxidants, honey, and nutrients for overall vitality.

Restore Your Gut Now

Pure Ingredients, Sensational Experience

Every jar is packed with carefully selected, all-natural ingredients to deliver a powerful, targeted solution.

Gold Kiwifruit Pectin600 mg

Gold Kiwi Pectin supports healthy digestion and promotes gentle, natural gut balance. 
Rich in fiber and antioxidants, it helps feed the beneficial bacteria in your system that are struggling to keep up.

manuka honey500 mg

Manuka honey is a potent natural superfood known for its unique antibacterial properties and immune-boosting benefits. It supports digestive health by soothing the gut and promoting balanced microbiota. Rich in antioxidants, Manuka honey also helps protect against oxidative stress and promotes skin health.

Colostrum Powder2000 mg

Colostrum powder is packed with immune-supporting antibodies, growth factors, and nutrients that promote overall wellness and vitality. It helps maintain a healthy gut lining, supporting digestion and nutrient absorption. Colostrum also aids in muscle recovery, supports a strong immune response, and contributes to healthy aging.

Empower Your Health with Pure Ingredients

NO CHEMICALS

SUSTAINABLE

all-natural

TOXIN-FREE

CRUELTY-FREE

Intestinal Fortitude provides top quality supplements. I have seen profound results in my clients when using their various formulas. They are thoughtfully created and do fantastic things to heal the gut. I was thrilled to discover Intestinal Fortitude and will be using their products forever!

Emily D., Functional Nutritional Therapist

Better Ingredients. Better Science. Better Results.

Not all supplements are created equal. See why our formulas stand out with superior ingredients, purity, and effectiveness.

100% Clean Formula

Research-Backed Ingredients

Advanced Gut Support

Transparent Labeling

No Fluff, Just Focus

Pure & Clean Formula

Zero Artificial Additives

No Unnecessary Fillers

Zero preservatives

Zero Soy

Zero Common Allergens

Zero Gluten

Decades of Science in Every Jar

Backed by cutting-edge research, our formulas combine the latest advancements in gut health and inflammation support. We use only the most effective, clinically studied ingredients to help you feel your best every day.

Feel Better

Science-Backed Wellness

Clinically Clean Formulas

Targeted Gut Support

Rigorously Lab Tested

the Intestinal Fortitude 180-Day Healthier You Guarantee.

We stand behind the quality and effectiveness of all our products. If you try any of our supplements and feel they aren’t the right fit for you, we offer a 180-day, no-questions-asked, money-back guarantee.

Frequently Asked Questions

Strengthens immunity, repairs gut lining, reduces inflammation, and improves nutrient absorption.

Yes. Our supplements are made with high-quality, natural ingredients.

Results can vary depending on your body and health goals. Some people experience noticeable improvements in digestion, recovery, or energy within a week, while deeper gut support and healing may take a few weeks of consistent use.

For Colostrum, take 1-2 capsules daily on an empty stomach for a body boost that supports gut function and digestive health, and also supports immune health. Always follow the instructions on the label and consult your physician if unsure.

Yes, colostrum is generally safe for daily use and well-tolerated by most people.

Real Stories, Real Results

JESSICA CARTER

"I’ve struggled with chronic gastritis for years. After trying the ‘Reduce, Repair, Rebuild’ bundle and switching to a clean diet, my pain has mostly stopped. It’s a game-changer, and I finally have hope!"

Feeling Better Than Ever!

SOPHIA MARTINEZ

"These supplements have made my symptoms much milder than before. I’m noticing a real improvement!"

Balanced & Refreshed

ETHAN COLLINS

"Just 12 hours after my first dose, I drank my morning coffee without pain or cramping. I’m excited to continue using AI-5 and GLR-6!"

Supports My Routine

AMELIA FOSTER

"I had acid reflux and microbiome issues for months. GLR-6 helped a lot, and adding AI-5 and L-Glutamine made it even better. I’m still tapering off PPIs, but I see great progress!"

Great Product, Slight Taste

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Intestinal Fortitude White Center