Your FREE Bio-Avail Omega+ will automatically be added at checkout

15,800+ Happy Customers

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

Get Bio-Avail Colostrum+ Now
  • Free Shipping
  • 60-day Returns

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.

Get Bio-Avail Colostrum+ Now

What makes Bio-Avail Colostrum+ 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. 

Get Bio-Avail Colostrum+ Now
  • Free Shipping
  • 60-day Returns

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 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 pouch of Bio-Avail Omega+. Plus, free shipping when you order 3 or more pouches!

 30-Day Supply

1 Bio-Avail Colostrum+ pouch +
1 FREE Bio-Avail Omega+ pouch

$131.91 $69.94
You're saving: $61.97
Try Risk Free

60-Day Money-Back Guarantee

Most Popular
Save 30%
90-Day Supply

3 Bio-Avail Colostrum+ pouches +
1 FREE Bio-Avail Omega+ pouch

$271.79 $190.25
You're saving: $81.54
Try Risk Free

Free Shipping • 60-Day Money-Back Guarantee

Save 40%
180-Day Supply

6 Bio-Avail Colostrum+ pouches +
1 FREE Bio-Avail Omega+ pouch

$481.61 $288.97
You're saving: $192.64
Try Risk Free

Free Shipping • 60-Day Money-Back Guarantee

About your free Bio-Avail Omega+

The power of fish oil, curcumin, and black seed oil in a single product!

Bio-Avail Omega+ combines the purest and freshest fish oil with the most bioavailable forms of curcumin and black seed oil, so you can get the incredible benefits of these nutrients in a single, two soft-gel serving.

Bio-Avail Omega+ is the first and only product on the market that combines ultra-pure fish oil with the most bioavailable forms of curcumin (Novasol) and black seed oil (ThymoQuin).

It’s like taking three supplements in one product!

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 259 reviews
81%
(210)
8%
(20)
5%
(13)
3%
(7)
3%
(9)
k
kirsten
Great

Adapt Naturals Bio-Avail Colostrum has been a game changer for my health. Within days, I noticed better digestion, improved energy, and a stronger immune system. The quality is top-notch, and it mixes easily with no strange aftertaste. I feel healthier and more resilient than ever – highly recommend!

Hi Kirsten,

It’s wonderful to hear Bio-Avail Colostrum+ is fitting so seamlessly into your routine! The high-quality colostrum is carefully processed to preserve bioactive compounds that support gut and immune health—and we’re so glad you’re enjoying the taste and mixability.

T
Tish Mallicoat
Love it!!

I just finished chemotherapy and took this product along with my other Adapt Natural supplements consistentl . My team couldn’t believe how well I did. I love these products. Thanks Adapt Naturals!

Hi Tish,

Thank you so much for sharing this. We’re truly honored to be part of your wellness routine during such a critical time. Bio-Avail Colostrum+ is designed to support gut barrier integrity and immune function with bioactive compounds like lactoferrin, beta glucan and immunoglobulins. We’re thrilled you’re feeling the difference and grateful for your trust in Adapt Naturals.

A
Ashley Anglin
Love it!

A month after I began taking Colostrum, my hair stylist told me that I had a TON of new hair growth. I have Hashimoto's and this has also helped my energy and brain fog tremendously!

Hi Ashley,

This is such powerful feedback—thank you. Colostrum+ is packed with growth factors and immune-supportive nutrients like lactoferrin and beta-glucan, which can help nourish both the gut and hair follicles from the inside out. We’re thrilled it’s supporting your energy and brain clarity too!

D
Debi Sommars
Excellent!

I've been suffering, and rather embarrassingly so - a "bad" stomach for 5 + years. The combo of Biome and Colostrum is managing all of my bloating, gas and discomfort beautifully. Thank you! It's life changing.

Hi Debi,

We’re so grateful to hear this—thank you for your honesty. The combination of Biome Protect and Colostrum+ was designed to support gut integrity, improve recovery, and restore microbial balance. It’s incredibly rewarding to hear it’s bringing you comfort after years of digestive struggle. We’re honored to be part of your healing journey.

N
Nicole L
Great product

I have yet to find a better one.

Hi Nicole,

That’s such a strong endorsement—thank you! We work hard to source clean, bioavailable colostrum with added lactoferrin and beta-glucan for gut and immune support. So glad you found a match that stands out!

123