Introducing The World's First AI-Precision Immune Formula

Fierce Immunity

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1 BOTTLE OF FIERCE IMMUNITY

$58 $49.30 One-Time

$44.37 Subscription

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3 BOTTLES OF FIERCE IMMUNITY

$174 $133.11 One-Time

$119.80 Subscription

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6 BOTTLES OF FIERCE IMMUNITY

$348 $260.10 One-Time

$234.08 Subscription

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12 BOTTLES OF FIERCE IMMUNITY

$696 $502.86 One-Time

$452.58 Subscription

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PROTECT YOURSELF FROM WHAT'S COMING NEXT

The future is uncertain, but one thing is clear: having a strong immune system is your best line of defense.

In this exclusive clip from our latest webinar, learn how Fierce Immunity helps protect you from the health threats we face today—and those on the horizon.

WHAT MAKES FIERCE IMMUNITY DIFFERENT?
While other brands are simply ingredient-based, Fierce Immunity goes beyond by harnessing the power of AI technology and Swarm Intelligence. This allows us to formulate the precise amount of each bioactive ingredient to synergize perfectly with your body’s natural immune response.
Instead of guesswork, we use data-driven precision to create a formula that supports and strengthens your immune system with unparalleled accuracy. It's not about packing in the highest doses, but about how each ingredient synergizes to provide the most effective and powerful protection.
  • AI-Precision
    Leverages the power of Swarm Intelligence and AI to deliver an effective blend of immune-boosting ingredients.
  • Nature + Science
    Vitamin D, Zinc Ascorbate, Quercetin, Hesperidin, and L-Arginine combine to form a potent, synergistic formula.
  • Immune Armor
    Supports your body’s innate immune system, helping to fortify your natural defenses and resilience.
Sharing Our Passion Through

OUR COMMITMENT

  • GMP CERTIFIED
    Rebel Lion’s Fierce supplements are produced at a good manufacturing practices (GMP) certified facility.
  • MADE IN THE USA
    “Liberty and justice for all” is core to our values. We proudly make our supplements in America.
  • NON-GMO
    As part of our zeal for health, we commit to sourcing the highest quality non-GMO ingredients.
  • GLUTEN-FREE
    To serve the gluten-free community, our products are made without ingredients that contain gluten.
  • 3RD PARTY TESTED
    Our products are held to stringent standards, ensuring that our formulas are objectively pure.
  • INTEGRITY
    Our commitment to community, health, and truth is rooted in every product. That’s the Rebel Lion way.
Still have questions?

FAQs

Do you ship internationally?

Yes! However, due to restrictions, we cannot ship to certain countries. Be sure to check our shipping policy for more info.

Is Fierce Immunity safe for kids and pets?

Yes, but as with any supplement, it’s always best to consult with a healthcare professional before giving it to children or pets.

Can I open the capsules if I can't swallow them?

Yes, the contents of the capsules can be mixed with water or juice if swallowing capsules is difficult for you.

Why is the Vitamin D dose lower than other products?

We’ve included a lower dose because high doses of Vitamin D can do more harm than good. Fierce Immunity is designed to maximize the effectiveness of Vitamin D without the risks associated with excessive intake.

  • OUR FIERCE GUARANTEE
    If you're not happy with your Fierce Immunity purchase, contact us within 30 days for a hassle-free return or refund.