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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:

GRASS-FED BOVINE COLOSTRUM
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.

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

BETA-GLUCAN (WELLMUNE®)
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 Colostrum+ 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 seasonal immune challenges

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 down days and faster recovery

  • 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 pouch of Bio-Avail Multi included. Plus, free shipping when you order 3 or more pouches!

 30-Day Supply

Bio-Avail Colostrum+ Pouch +
1 FREE Bio-Avail Multi Pouch

$133.67 $69.97
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90-Day Supply

3 Bio-Avail Colostrum+ Pouches +
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$273.55 $191.49
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180-Day Supply

6 Bio-Avail Colostrum+ Pouches +
1 FREE Bio-Avail Multi Pouch

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About your free Bio-Avail Multi

Introducing the first Multivitamin + Greens & Reds Powder—All in One Pouch!

We created Bio-Avail Multi to make it easy for you to get the full spectrum of nutrients you need to thrive, from vitamins and minerals like B12, vitamin D, and magnesium to phytonutrients like polyphenols, bioflavonoids, and carotenoids.  

Unlike most multivitamins, which only provide vitamins and minerals, Bio-Avail Multi includes essential vitamins and minerals and a full range of research-based phytonutrients like lutein, lycopene, broccoli seed extract, and more. 

It’s like taking a multi, greens, and reds powder in one supplement!

60-Day Money Back Guarantee

60-Day Money Back Guarantee

We're confident you'll love our products, but if you're not completely satisfied, we offer a 60-day, 100% money-back guarantee on all purchases. Simply contact us for a full refund, no questions asked. Buy with confidence knowing you're covered by our guarantee.

The Adapt Naturals Standard

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.

Third-Party Lab-Tested with Transparent Results

Third-Party Lab-Tested with Transparent Results

We conduct third-party testing on all our products to verify their purity, potency, and safety. Most importantly, we transparently share these results with our customers by posting Certificates of Analysis (COAs) and test results directly on our website. We want you to have full confidence that you’re getting exactly what you think you are with each purchase.

See Test Results

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. 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. 

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 252 reviews
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Tara Holley
Bio-Avail Colostrum Works!

I started taking Bio-Avail Colostrum to help support my gut. I've done a cleanse and had been taking Biome Protect for several months with good results of bowel movements, but my stomach and gut were still irritable. If I ate the wrong thing or just daily for no reason, I would get cramping or bloating. Since I started taking this colostrum, my symptoms have almost completely resolved. The only time they recur is if I miss taking it for several days. It has also helped with my skin, providing a smoother, more moist and youthful appearance! I'm very happy with this colostrum and recommend it frequently.

Hi Tara,
Thank you so much for sharing your detailed experience — it means a lot to us! It’s incredible to hear how much Bio-Avail Colostrum+ has helped calm your gut symptoms and even supported your skin health. We’re happy to hear that you notice the difference when you miss it, consistency truly can make all the difference with foundational gut support. We’re honored to be part of your wellness routine, and we appreciate you recommending it to others!

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Cindh
High quality good product

Ive tried 2 different colostrum brands and i love adapt naturals especially that it has lactoferrin. I have noticed stronger nails and less bloating since taking this.

Hi Cindh,

Thank you so much for your kind words! We’re thrilled you’re loving Bio-Avail Colostrum+ and noticing those tangible benefits. Including lactoferrin was intentional to support immune and gut health, and we’re so glad it’s also helping with bloating and nail strength as well. We appreciate your support!

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Catherine Poulin

The first month taking Colostrum I was very happy with the bowel movements. I am on my second Colostrum and do not see the same results so I am left to assume I have cleaned out my system.

Hi Catherine,

Thank you for sharing your experience — we really appreciate it. It’s actually quite common for colostrum to support more noticeable digestive shifts early on, especially as it helps strengthen the gut lining and rebalance the microbiome. Over time, many people find that regularity stabilizes at a new, healthier baseline.

That said, if you feel like you’re not seeing the ongoing support you'd hoped for, please remember you're covered by our 60-day money-back guarantee — and we're always here to help troubleshoot or answer any questions that may come up. Take care!

S
Sarah Frantz
Great product!

I was using the other more popular brand and was having so many issues with fulfillment and switched to Adapt. It has been great!!

Hi Sarah,

We’re so glad you made the switch and that it’s been a smooth experience! Bio-Avail Colostrum+ uses pure, grass-fed colostrum plus lactoferrin and beta-glucan for gut and immune support. We appreciate your trust and are happy to have you with us!

S
Sunny Johnson-Gutter
Immune booster

Both my wife and I work in health care and in 18 months I have been taking this colostrum I havent been sick once. Even living in close quarters with my wife when she has brought home bugs I haven’t caught any of them.

Hi Sunny,

Wow — thank you for this sondeful feedback! Bio-Avail Colostrum+ supports mucosal immunity (our first line of defense) through immunoglobulins, lactoferrin, and growth factors, which may help explain your resilience even in close contact settings. We’re honored to support both you and your wife as healthcare workers — thank you for all you do!

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