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!

  • Restore your “inner glow” and nourish your skin, hair, and nails 

  • Fortify and balance your immune system

  • Support 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


Regenerate and replenish with key nutrients

Enjoy radiant skin, hair, and nails and a youthful glow


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

Boost your energy and vitality and turn the clock back on aging

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. 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.


Want to turn back the clock and maintain your youthful glow? Bio-Avail Colostrum+ harnesses the anti-aging benefits of colostrum, lactoferrin, and beta-glucans to help you fight premature aging from the inside out.

The essential nutrients, antibodies, and growth factors in Bio-Avail Colostrum+ slow biological aging by nourishing the microbiome, sealing the gut lining, supporting the immune system, and promoting overall vitality. Lactoferrin defends against threats and promotes a healthy gut environment, while beta-glucans fine-tune your immune response to keep your body's defenses strong and resilient.

The result? A more youthful appearance, increased energy, and unstoppable vitality. Say goodbye to premature wrinkles, dull skin, and brittle hair and nails. With Bio-Avail Colostrum+, you can unlock your body's innate ability to heal, regenerate, and thrive.

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 seasonal immune challenges

Premature wrinkles, dryness, or other skin issues

Imbalanced 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

  • Improved sleep quality

  • 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

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

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 sensitive to lactose. We recommend speaking with your healthcare provider before supplementing with Colostrum+ if you are sensitive to lactose.

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 62 reviews
Suellen Lussier

I have been taking a few different Adapt Naturals products for a while now. I have taken certain supplements for years and decided to switch to this company because I have been following Chris Kresser on line for many years and appreciate how much I have learned over the years and really trust him and his passion for helping others. I decided to add the colostrum in and purchased one bag to try. I finished the month’s supply and am waiting patiently for my next auto-ship to make it a regular addition to my daily routine. I can already tell that my hair, skin and nails are enjoying the benefits! I have never taken colostrum before so I don’t have anything to compare it to. On your search for better health, I highly recommend Adapt Naturals!

Mackenzie Carey
Best purchase!!

Tastes so mild and so easy to add to my daily regimen. I’m so happy with this product and the formulation — literally double the dose of colostrum compared to Armra for half the price. Everyone needs to stop paying for Armra and get this product! My hair growth is insane this month.

Hi Mackenzie, Thank you for choosing Adapt Naturals, We are pleased to hear your are loving our Colostrum +. Thank you for sharing the amazing result you have experienced with your hair. All the best on your supplement journey!

New to me

I am happy to switch to this product. Reasonable portion and low impact packaging. Feeling good so far and only one month in. Grateful to make the switch!

Hi Melina, We are happy you made the decision to switch to our Colostrum + and now you are loving it. Thank you for being an Adapt Naturals supporter. All the very best!

Wendy Nicole Magid

This was an incredible product to try for a 30-day supply. I loved how easy it was to add to my morning routine. I was able to see a difference in my immunity over the month and overall gut health.

Hi Wendy, Horay! We're thrilled to know you are loving our bio-Avail Colostrum and its working well for you. Thank you for your review!


Def has helped with curving hunger. Also has helped my nails and hair!

Hi Kylie, Its our pleasure to hear of the amazing benefits you have experienced from our Colostrum+. Thank you for being a great customer. We appreciate your review!