Bio-Avail Mag

60 capsules 30 day supply

A Highly Absorbable and Effective Form of Magnesium

Bio-Avail Mag

60 capsules 30 day supply

A Highly Absorbable and Effective Form of Magnesium

Restore optimal magnesium levels and experience its incredible benefits—with a lower risk of unpleasant GI side effects

  • Promote relaxation and experience deeper and more restorative sleep.

  • Maintain normal blood sugar and metabolic and cardiovascular function.

  • Support strong bones with the collaborative effects of magnesium, calcium, and vitamin D.

  • Soothe your digestive system and improve bowel regularity and gut health.

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Revitalize Your Diet

Boost magnesium intake (over 90% deficient)

Get the amount you need for optimal function and well-being.


Experience restful sleep and a sense of calm

Soothe your nervous system and buffer the effects of daily stress.


Maintain normal blood sugar and metabolic health

Improve conversion of carbohydrates and fat into energy your body can use.


Support healthy bones as you age

Extend your healthspan and vitality with stronger and more resilient bones.

Real Stories of Health and Happiness

  • “I noticed a great improvement in my rest and the amount of time it takes me to fall asleep. I can feel my sleeping is a lot deeper than what it was before. I highly recommend!"

    —C.D., Verified
  • “The Bio-Avail Mag is a must have in my supplement regimen. I’ve been sleeping better as it helps relax my body and calm my mind.”

    —Nancy, Verified
  • “I'm delighted with this product! I feel that is helping my digestion and overall energy. I highly recommend it!”

    —Sasha, Verified

Discover the Bio-Avail Mag Advantage

Buffered chelate form
Non-buffered form
Maximally absorbable
Low absorption
Full strength
Dose too low
Clinical Background
15 years in-clinic
Not typically
Supports ecosystem health
Disregards soil health
Single-use plastics
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 Mag?

Our modern diets often fall short of providing the optimal amounts of essential nutrients our bodies need to function at their best. With Bio-Avail Mag, you can optimize magnesium intake and support your overall health and well-being—without the unpleasant GI side effects associated with inferior forms of magnesium.

Formulated to Replicate Optimal Ancestral Diets

Changes in dietary patterns, declining soil quality, and a growing toxic burden have made it increasingly difficult to obtain adequate nutrients from our daily food intake. Bio-Avail Mag is designed to address these challenges by providing a highly bioavailable form of magnesium that gets absorbed quickly and is easy for the body to use.

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 Mag combines cutting-edge research with insights from ancestral wisdom to bring you a premium-quality supplement.

Signs You Need Bio-Avail Mag

Low energy or fatigue

Chronic stress or “fight or flight” response

Muscle spasms or weakness

Difficulty falling and/or staying asleep

Decreased bowel regularity/GI discomfort

Suboptimal bone health

What You'll Feel Using Bio-Avail Mag

  • Sustained energy throughout the day

  • Relaxed and smoothly toned muscles

  • Improved bowel regularity and GI health

  • A sense of calm and well-being

  • Deeper, more restorative sleep

  • Stronger and more resilient bones

Bio-Avail Mag

Unlock Your Optimal Health

Upgrade Your Wellness with Bio-Avail Multi—Magnesium, Upgraded

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

Bio-Avail Mag is best taken with food. We recommend taking the daily two-capsule serving with dinner to promote optimal sleep and relaxation and healthy elimination the following day.

Many magnesium supplements on the market contain magnesium oxide or magnesium citrate. These forms of magnesium are not as well-absorbed as the Buffered Magnesium Chelates that we use in Bio-Avail Mag, which bypass typical routes of absorption and are thus less likely to cause the unpleasant gastrointestinal effects associated with less bioavailable forms of magnesium.

Customer Reviews

Based on 82 reviews
Dan Ros
Why were the ingredients changed?

There is no notification or idication that the ingredients changed nor an explanation?

Jill J

So far so good!!! Sleeping better than I have in a long time! Waking up feeling rested!

Hi Jill, We are happy our Bio-Avail Mag has improved your sleep. We hope as you ontinue to supplement on this product , you will notice other improvements. Thank you for sharing your experience!

Ingredient Changes

I was so very disappointed with my recent Bio-Avail Mag reorder. I was advised that the packaging had changed to the pouches however was not advised that Adapt Naturals had actually changed their ingredients as well. I did not realize that I would need to check for ingredient changes each time I reordered this product. Will not order this again. Will continue to use the Bio-Avail E capsules but will pay more attention to the ingredients each and every time I order.

Stephanie Mahaffey

Works great!

Hi Stephanie. We are happy our Bio-Avail Mag is working for you. Thank you for reviewing this product. We appreciate your support!

Keeley McKenzie
Sleep has improved!!

Highly recommend this Magnesium. I have noticed such a difference in my sleep since I started taking it!

Hi Keeley, We are pleased to hear you have noticed improvements in your sleep since using our supplement. We hope you experience other benefits. Thank you for reviewing the Bio-Avail Mag.