Immune Defense Stack

30 day supply

Beast mode for your immune system

Immune Defense Stack

30 day supply

Beast mode for your immune system

  • Fortify immune barriers and promote balanced immune function with Bio-Avail Colostrum+'s immunoglobulins, growth factors, and beta-glucans

  • Enhance immune cell function with Bio-Avail Omega+'s ultra-pure fish oil, curcumin, and black seed oil

  • Support overall immune health with Bio-Avail Multi's comprehensive blend of immune-essential vitamins, minerals, and antioxidants

  • Experience the transformative benefits of robust immune defense, reduced illness severity, and faster recovery

Warning: If taking a blood thinner medication, consult a health-care practitioner before use.

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Fortify your first line of defense

Bio-Avail Colostrum+ provides immunoglobulins and other factors to reinforce mucosal barriers in the gut, lungs, and other entry points.


Optimize immune function and regulation

Bio-Avail Colostrum+ and Bio-Avail Omega+ work together to balance immune responses for effective defense without harmful overreaction.


Bolster defenses during times of increased exposure

Bio-Avail Multi delivers crucial nutrients to support immune cell production, function, and protection during seasonal challenges.


Bounce back faster from immune challenges

The synergistic compounds in this stack help reduce the severity and duration of illness and promote faster recovery.

Powerful Nutrients & Vitamins

Grass-Fed Bovine Colostrum

Grass-Fed Bovine Colostrum

Bio-Avail Colostrum+ features 2.5 grams of nutrient-rich, cold-processed colostrum with immunoglobulins, growth factors, and other immune-supportive compounds.

Omega-3 Fatty Acids

Omega-3 Fatty Acids

Bio-Avail Omega+ provides ultra-pure fish oil with EPA and DHA to support healthy cellular response balance and immune cell function.

Vitamin D3

Vitamin D3

Bio-Avail Multi delivers 3,000 IU of vitamin D3, crucial for regulating immune responses and defending against seasonal threats.



Bio-Avail Colostrum+ includes 100 mg of lactoferrin to help neutralize threats, regulate cellular health, and support a healthy gut microbiome.

Vitamin C

Vitamin C

Bio-Avail Multi features highly bioavailable vitamin C, which supports immune cell function and helps shorten the duration of illness.

Beta-Glucan (Wellmune®)

Beta-Glucan (Wellmune®)

Bio-Avail Colostrum+ contains 200 mg of Wellmune® beta-glucan to prime immune cells for a rapid, effective, and balanced response to challenges.

NovaSOL™ Curcumin

NovaSOL™ Curcumin

This bioavailable curcumin in Bio-Avail Omega+ helps modulate immune responses, support cellular defenses, and promote overall immune function and resilience.

Zinc Glycinate

Zinc Glycinate

Bio-Avail Multi includes highly absorbable zinc chelate, essential for immune cell development, function, and signaling.

Signs You Need Immune Defense Stack

Frequent seasonal immune challenges

Slow recovery from illness

Always feel like you’re “fighting something”

Run down or fatigued more than usual

Hyperactive immune response against foods or environment

Gut issues that compromise immunity

Nutrient deficiencies that impact immune function

What You'll Feel Using Immune Defense Stack

  • Stronger resistance to seasonal bugs 

  • Reduced severity and duration of illness

  • Faster bounce-back and recovery 

  • More balanced, optimally functioning immunity

  • Improved gut and respiratory health

  • Enhanced overall resilience and vitality

  • Greater peace of mind and protection year-round

Discover the Immune Defense Stack Advantage

Natural, whole-food
Synthetic, fillers
Maximally absorbable
Low absorption
Health Focus
Addresses root causes
Addresses symptoms
Clinical Background
15 years in-clinic
Not typically
Supports soil health
Disregards soil health
Single-use plastic
Functional Medicine expert

60-Day Money-Back Guarantee

We stand behind the quality of our products, and we want you to be completely satisfied with your order.

The Adapt Naturals Standard

In our increasingly toxic world, the last thing you want to worry about is a lot of artificial junk in your supplements. Adapt Naturals supplements are made with the cleanest possible ingredients, without gluten or GMOs. Our products are manufactured in a U.S. facility that meets the NSF’s rigorous GMP regulatory standards.

Meet Chris Kresser, your
Trusted Health & Wellness Guide

Founder & Functional Medicine Clinician

  • Globally renowned expert with over 15 years of experience
  • Dedicated to helping people improve their health by addressing modern challenges and nutrient gaps

Author & Educator

  • Treated thousands of patients
  • Trained more than 2,000 healthcare professionals
  • Gained valuable insights into functional medicine and nutrition
Immune Defense Stack

Unlock Your Immune Potential

Defend Your Health with the Immune Defense Stack—Powerful Protection, Simplified

Get Healthier & Happier - Try Now

Good For You—And the Planet

You can’t have healthy humans without a healthy planet. That’s why Adapt Naturals is working toward zero plastic and landfill waste in our supply chain.

In the fall of 2023, we started transitioning our packaging to 100% compostable, stand-up pouches. They’re made from cellulose (wood pulp) and are free of PLA, BPA, PFAS, phthalates, and other harmful chemicals. They’re printed with non-toxic, compostable ink. The pouches are so clean and biodegradable that you can put them in your backyard or curbside compost bin! 

Our sustainable packaging initiative will prevent over 120,000 plastic bottles from ending up in a landfill or the oceans. Thank you for being part of the solution and helping Adapt Naturals protect the beauty of our natural environment!

Your Questions Answered

The Immune Defense Stack takes a multi-pronged approach to strengthen and regulate your immune system. Bio-Avail Colostrum+ fortifies immune barriers, modulates cellular response, and primes immune cells for effective responses. Bio-Avail Omega+ provides essential fats and compounds to support healthy immune function. And Bio-Avail Multi delivers a comprehensive blend of vitamins, minerals, and antioxidants to support overall immune health and resilience.

While this stack can be helpful for autoimmunity, we suggest our targeted Autoimmunity Stack for that purpose. It strengthens immune barriers, modulates cellular responses, and provides essential nutrients for immune balancing. However, it's always best to consult your healthcare provider for personalized guidance on managing your specific condition.

Yes, the Immune Defense Stack is formulated with safe, well-tolerated, and nourishing ingredients suitable for long-term use. Unlike some immune supplements that can overstimulate or suppress immune function, this stack optimizes and balances your immune system for lasting health and resilience. However, as with any supplement regimen, it's always a good idea to listen to your body, monitor your individual response, and adjust your protocol as needed under the guidance of a healthcare professional.

Yes, the Immune Defense Stack can be a valuable tool for supporting your body's natural defenses and recovery processes when you’re already fighting something. The nutrients and compounds in this stack can help reduce the severity and duration of illness, promote faster healing, and support a balanced immune response. However, it's always best to consult your healthcare provider if you have a severe or persistent illness, as additional treatment may be necessary.

While there's no guaranteed way to prevent autoimmunity, optimizing immune balance and gut health can significantly reduce risk. The Autoimmunity Stack provides key nutrients and compounds that support a well-regulated immune response. It is an excellent choice for those looking to ward off autoimmune issues and maintain vibrant health.

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