Bio-Avail Colostrum+

30 day supply

Grass-Fed Colostrum with Lactoferrin and Beta-Glucan

Bio-Avail Colostrum+

30 day supply

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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Seal your mucosal barriers to keep antigens out

Protect against pathogens, allergens, toxins, and other foreign invaders


Reduce immune hypersensitivity and over-reactivity

Fine-tune your immune system and restore a healthy balance


Feed your beneficial bacteria and reduce harmful microbes

Support your gut flora with prebiotics, immune factors, and beta-glucans


Transform your health from the inside out

Enjoy radiant skin, hair, and nails and more energy and vitality

Powerful Nutrients & Vitamins

Grass-Fed Bovine Colostrum

Grass-Fed Bovine Colostrum

Contains 2.5 grams of cold-processed colostrum from grass-fed cows never given antibiotics, hormones, or GMOs. Colostrum is “Mother Nature’s perfect first food.” It’s the nutrient-rich fluid female mammals produce in the first few days after giving birth. It serves as the first source of nourishment for newborns and is packed with essential nutrients, antibodies, growth factors, and other bioactive compounds. Colostrum nourishes the gut microbiome, supports the mucosal barriers (e.g., gut, skin, lungs, etc.), protects against infections, and modulates the immune response.

Lactoferrin (Bioferrin®)

Lactoferrin (Bioferrin®)

Contains 100 mg of lactoferrin (as Bioferrin®). Lactoferrin is a protein in the milk, tears, and saliva of mammals. It plays a vital role in defending against microbial invaders, promoting gut health, and enhancing the immune system's effectiveness. It also supports efficient iron metabolism—keeping it away from pathogens that require it and helping us to absorb it more efficiently. Lactoferrin is naturally present in small amounts (~3-5 mg per gram) in colostrum. We’ve included a much larger amount to amplify its benefits and provide better results. 

Beta-Glucan (Wellmune®)

Beta-Glucan (Wellmune®)

Contains 200 mg of beta-glucan (1,3/1,6 as Wellmune®). Beta-glucan is a naturally occurring polysaccharide in yeast, mushrooms, and other foods. It’s known as a “biological response modifier,” a class of compounds that regulate immune function. Beta-glucans help to “train” our innate immune cells, helping them to recognize and respond more quickly and efficiently to threats. Instead of boosting or suppressing the immune system, beta-glucans fine-tune it and restore balance.

Discover the Bio-Avail Colostrum+ 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

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

Why Choose Bio-Avail Colostrum+?

Bio-Avail Colostrum+ contains 2.5 grams of colostrum per serving—2.5x more than most competitors. This is critical because studies documenting colostrum’s benefits typically use a dose of 2 grams or more. We source our colostrum from grass-fed, pasture-raised farms across the US, and 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. But we didn’t stop there. We included two more compounds that support gut and immune health: lactoferrin and beta-glucan. Bio-Avail Colostrum+ is the first and only supplement that contains all three of these powerful ingredients. If you were to buy these products separately, you’d be spending well over $100—and taking more powder or pills.

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.

Harness Years of In-Clinic Experience and Ancestral Wisdom

Backed by Adapt Naturals' 15 years of in-clinic experience and dedicated to creating supplements that make a meaningful difference, Bio-Avail Colostrum+ combines cutting-edge research with insights from ancestral wisdom to bring you a premium-quality supplement.

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

Bio-Avail Colostrum+

Unlock Your Optimal Health

Upgrade Your Wellness with Bio-Avail Colostrum+—Immune Defense, Simplified

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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.

Starting in the fall of 2023, we’re 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

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!