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Grass-Fed Colostrum with Lactoferrin and Beta-Glucan

Get the benefits of three powerful gut and immune health nutrients in a single product!

✓ 2.5 grams of cold-processed colostrum plus 200 mg of beta-glucan and 100 mg of lactoferrin
✓ Fortify your immune defenses and reduce hyperactivity
✓ Nourish your microbiome and protect your gut barrier
✓ Revitalize your health from the inside out
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Introducing the first colostrum, lactoferrin, and beta-glucan product—all in one pouch!

Bio-Avail Colostrum+ is the first and only product on the market that combines cold-processed colostrum from grass-fed cows with two other “immune health superstars”: lactoferrin and beta-glucan.

Unlike any other colostrum supplements, which only provide colostrum, Bio-Avail Colostrum includes 100 mg of lactoferrin and 200 mg of beta-glucan, 2 other powerful nutrients that support gut and immune health.

Bio-Avail Colostrum+ is the first and only supplement to combine all 3 of these ingredients in a single product.

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What makes Bio-Avail Omega+ stand out?

  • More than double the colostrum

    Bio-Avail Colostrum+ contains 2.5 grams of colostrum vs. 1 gram found in many products. We source our colostrum from 100% pasture-raised cows never given hormones, antibiotics, or GMOs.

  • Contains 200 mg of beta-glucan

    Bio-Avail Colostrum+ has 200 mg of beta-glucan (1,3/1,6) as Wellmune®. Beta-glucans prime and train our immune cells, helping them to respond more effectively to threats. They also help balance and regulate immune function.

  • Contains 100 mg of lactoferrin

    Bio-Avail Colostrum+ includes 100 mg of lactoferrin (as BioferrinⓇ). Lactoferrin helps defend against microbial invaders, promotes gut health, and enhances the immune system’s effectiveness.

Formulated to Rebuild Gut and Immune Health

From processed food to environmental toxins to chronic stress, the modern world makes health hard. Bio-Avail Colostrum+ was formulated to rebuild your gut health, fortify and strengthen your immune defenses, and restore immune balance. Supporting the “gut-immune axis” is one of the most important things we can do to improve our overall health and extend our lifespan. Bio-Avail Colostrum+ promotes enhanced vitality, a more youthful and radiant appearance, and greater protection against the challenges of daily life.

Here are some benefits you can expect from this one-of-a-kind product:

Strengthens immune defense. Seal your mucosal barriers to keep antigens out. Protect against pathogens, allergens, toxins, and other foreign invaders.

Modulates immune response. Reduce immune hypersensitivity and over-reactivity. Fine-tune your immune system and restore a healthy balance.

Nourishes the microbiome. Feed your beneficial bacteria and reduce harmful microbes. Support your gut flora with prebiotics, immune factors, and beta-glucans. 

Promotes vitality from within. Transform your health from the inside out. Enjoy radiant skin, hair, and nails and more energy and vitality.

Bio-Avail Colostrum+ contains:

2.5 grams
of cold-processed colostrum from grass-fed cows never given antibiotics, hormones, or genetically modified organisms (GMOs). Delivers 2.5 times more colostrum per serving than most brands, with almost 40% higher immunoglobulin content. 

100 mg
of lactoferrin (as Bioferrin®). Lactoferrin helps defend against microbial invaders, promotes gut health, and enhances the immune system’s effectiveness.

200 mg
of beta-glucan (1,3/1,6) as Wellmune®. Beta-glucans are “biological response modifiers” that strengthen and balance the immune system while reducing hypersensitivity.

Bio-Avail Colostrum+ gives you 3 powerful immune-supporting nutrients in a single product—at a significantly lower price than you’d pay for them separately. 

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Adapt Naturals Bio-Avail Colostrum+

Bio-Avail Omega+ is the most complete, advanced colostrum formula on the market. No other product combines the benefits of colostrum, lactoferrin and beta-glucan

  • Contains 2.5 grams of cold-processed colostrum from grass-fed cows
  • 100 mg of lactoferrin (as Bioferrin®).
  • 200 mg of beta-glucan (1,3/1,6 as Wellmune®)
  • Formulated by globally-renowned Functional Medicine clinician Chris Kresser
  • Made without gluten and GMOs
  • Manufactured in the US in a certified GMP facility

Signs You Need Bio-Avail Colostrum+

Frequent colds, flu, or other infections

Premature wrinkles, dryness, or other skin issues

Imbalanced or hyperactive immune system

Hair loss or brittle and dry hair and nails

Gas, bloating, or other digestive problems

Low energy and fatigue

What You'll Feel Using Bio-Avail Colostrum+

  • Stronger immune defenses

  • Fewer sick days and faster recovery from illness

  • A more balanced immune response

  • Smoother digestion and elimination

  • More youthful and radiant skin, hair, and nails

  • Greater vitality and overall health

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

"I'm excited about Adapt Naturals and Bio-Avail Multi. Chris is a leading clinician, educator, and researcher in the Functional Medicine space. I've learned a lot from him about nutrition and supplements over the years, and I know his products are fueled by high-quality, evidence-based ingredients you can trust."

Dr. Mark Hyman MD

14-time New York Times best selling author and founder of the Cleveland Clinic Center for Functional Medicine

"Chris Kresser is one of the sharpest minds in the functional / integrative medicine space. I have reached out to Chris many times when working to unravel my own health journey and his insights have always been incredible. Given all that, I'm super excited for the release of Adapt Naturals line of supplements, especially Bio-Avail Multi. Chris and I are aligned in that we believe the bulk of our nutrition should come from whole, minimally processed foods, but we also recognize that the right supplement, at the right time can 'change everything.'"

Robb Wolf

Former research biochemist and 2-time New York Times bestselling author of The Paleo Solution and Wired To Eat.

"I can't think of a better person to formulate supplements than Chris Kresser. I trust his ability to skillfully combine ancestral wisdom with modern science and cutting-edge research. Taken together, the products offer a well-rounded and complete way to boost your nutritional status. I am excited about this high-quality, comprehensive new product line - I strongly recommend it!"

Dr. Akil Palanisamy MD

Harvard-trained physician, author, speaker, and holistic medicine expert in integrative and functional medicine

"I trust Chris Kresser with my life, and you will too."

Sara Gottfried MD

Harvard Trained Physician and New York TimesBestselling author of The Hormone Cure

Choose Your Bio-Avail Colostrum+ Package

Free shipping when you order 3 or more pouches! Plus a FREE pouch of Bio-Avail Myco.

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.

Your Questions Answered

We suggest mixing it with 6-8 ounces of room-temperature water and drinking it on an empty stomach, i.e., 30 minutes before or 2 hours after a meal. If you cannot take it on an empty stomach, you’ll still get good results taking it with food.

We source our colostrum from grass-fed, pasture-raised farms across the US. It’s free from pesticides, heavy metals, antibiotics, and hormones. It has higher IgG content than competing products (40% vs. 25%). And it’s cold-processed to keep the fragile immunoglobulins and other nutrients intact.

While colostrum does contain a minimal amount of lactose, it is generally well-tolerated by people who are lactose intolerant. We suggest that people who are lactose intolerant speak with their healthcare provider before supplementing with colostrum.

Yes, all dairy products (including colostrum) contain casein. We do not recommend taking Bio-Avail Colostrum+ if you have a casein sensitivity or allergy. 

No. The pasture-based farms we source colostrum from understand the importance of colostrum to developing calves. The calves are fed 2–4 liters of colostrum shortly after birth. New mothers often produce more than 12 liters, so the farmers can harvest this excess colostrum without harming the calves. 

Our colostrum contains 40% IgG. This is significantly higher than the average of 25% amongst our competitors. 

Lactoferrin is naturally present in colostrum at 0.3-0.5%. This equals 3-5 mg per gram, or 7.5-12.5 mg per our 2.5 gram serving. However, Bio-Avail Colostrum+ also includes 100 mg of pure lactoferrin—yielding a total of 107.5 to 112.5 mg of lactoferrin per serving. This is far higher than other colostrum products that do not contain additional lactoferrin. 

Customer Reviews

Based on 17 reviews

I tried a bag with my last order and it was easy to take, I dry dosed it. I don’t think this is something I need continuously but it’s nice to know it’s available as immune support while winter viruses are circulating.

Hi CC, We appreciate your review of our Colostrum and is happy you are loving it. Thank you for supporting Adapt Naturals!

MJ Duffy
Game Changer

I have been using the colostrum for about 6 weeks and it has changed my life! I am in the middle of an intense mold detox which has affected my gut in a major way. I am now tolerating foods that I have not eaten in over a year. I take it first thing on an empty stomach and actually envision the healing as I drink it! I am beyond impressed and highly recommend this product.

Hi MJ, Thank you for reviewing the Colostrum. We're indeed thrilled to hear of the improvements you have noticed since taking this supplement. We appreciate your support to Adapt Naturals!

Super gut remedy

I have had digestive issues for years. I have tried many things and only after taking bio-avail colostrum for 2 months, I have I really notice a change for the better.

Hi Fcook, We are pleased to hear our Colostrum supplement has helped to improve your digestive issues. Thank you for reviewing this product!

No illness, better mood

I should say I started the multivitamin at the same time as the colostrum. I have a 1st grader, so I was constantly exposed to germs this past fall and getting sick nonstop. I haven’t gotten sick at all (even after being exposed to my son having another cold) since taking both supplements. I’ve also noticed better mood overall, which is amazing! I’m going to start my son on the colostrum next and see how he does. I take it on an empty stomach as instructed but I’ll have to mix it with a smoothie for me son. Hopefully it’s still effective for immune boosting.


It's a good product that is easy to drink in water

Hi Kendell. Thank you for reviewing our Bio-Avail Colostrum . We hope you experience all the great benefits of this product. Best of Health!