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 87 reviews
Sharon Shin
Self help grandma

Took your online class in early 2022, and very impressed with your research! Not rich enough to afford self pay medical help, but feel better as I age (78) following your guidance and taking supplements as tolerated. No classic medical issues, but ones the labs or imaging don’t acknowledge! Goal is to keep best health possible, and your research, education and products are helping me reach my “best of days goals.”

Hi sharon, Thank you for trusting Adapt Naturals with your health. We're thrilled to hear you are loving the Bio-Avail Mag. We wish you all the best in your health and supplement journey!


I’ve tried others and the quality of this one is second to none . I have a stressful work schedule and I added this to my night time regimen. I take it an hour before bedtime and I start unwind and feel relaxed right before sleep .

Hi Jason, We are happy to hear our Bio-Avail Mag is helping you to unwind so you can feel more relaxed before sleep. Thank you for supporting Adapt Naturals. We appreciate your review!

Joanne Dean
Better Sleep and Calming

With everything going on in our world today, it’s important to stay calm and to get good sleep and this product seems to help. Easy to take and bioavailability is important. I trust this product.

Hi Joanne, Thank youf for trusting Adapt Naturals with your health. Its great to hear our Bio-Avail Mag jas helped you to stay calm and have a better sleep. Thank you for sharing your experience with us!

Michelle L

I’ve been taking this magnesium for several months now and have experienced both better sleep and no more muscle spasms. I recently ran out in between orders and noticed a definite change in a negative way and can’t wait til my recent order arrives! This truly is a great supplement just like all of the other adapt natural supplements I take.

Hi Michelle, We're thrilled to hear you have experience positive changes in sleep and a reduction in muscles spasms since trying our Bio-Avail Mag. Thank you for giving our products a try! We appreciate your feedback.

Andrew Bufkin
I feel more regular and sleep much better.

As the video states, I love this magnesium. My favorite part is the stress relief.

Hi Andrew. We are glad our Bio-Avail Mag has helped with your sleep and stess relief. Thank you for sharing your experience with this supplement.