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

Purchase type options
Delivers every

Free US Shipping on orders over $85

60-day Returns


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.

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

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

Third Party Lab-Tested

At Adapt Naturals, all of our products are third-party tested and validated, and we are always happy to share these results with customers. We want you to have full confidence that you’re getting exactly what you think you are with each purchase.

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.

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

You can mix Bio-Avail Colostrum+ into both foods and beverages! Recent research suggests that for generally healthy individuals, taking colostrum with food does not significantly impact its absorption or benefits. Feel free to stir it into yogurt, oatmeal, smoothies, or other foods and drinks.

However, we advise against mixing Bio-Avail Colostrum+ into hot beverages like coffee or tea, as high temperatures can degrade the delicate immunoglobulins and other beneficial proteins. Stick with room temperature or cold liquids and foods for optimal results.

If you have diabetes, metabolic issues, or simply find you get better results taking it on an empty stomach, mixing Bio-Avail Colostrum+ with 6-8 ounces of room-temperature water and drinking it 30 minutes before or 2 hours after a meal is still a great option.

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 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 82 reviews
Colostrum powder

Great product, I’ve been taking it for two months. My nails and hair is growing so fast. I also have a lot more energy.

Amy J.
Hair changes

I have been using for 6+ months and I can see the volume returning to my hair!

Sue Ecklund
Best Gut Healer

This colostrum really settles down gut problems. Mixes well and has wonderful ingredients besides. A must for my AM drinks.

Jenny Miller
Loving the colostrum

I have noticed a difference with my gut health since I've started taking this. Food sensitivities have seemed to somewhat diminish.

Kevin Alexander
Feeling like it helps, esp with digestion

I wanna believe this is doing something, it's hard to know for sure, but feels like its helping with digestion.