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13,575+ Happy Customers

Get the Nutrients You Need to Thrive With Core Plus

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See What Others Are Saying About Core Plus

  • “I started taking the CP Bundle about 2 months ago. I have not changed anything else in my life, i.e. eating, exercise, sleep, stress. Since about a month ago, I am definitely more energized throughout the day!!! I can only attribute this to the change that I did make, and that is the start of these vitamins!! My husband has noticed it also, he was a skeptic about also taking them, but he said to me yesterday, "can you order me a supply too"??? So I did and I'm sure he is going to get the same results.”

  • “I was unprepared for the vibrant health that I am now experiencing after having taken the Core Plus Bundle for 3 months. Calm, steady energy—just returned from a 3,000 mile roadtrip. Had a few aches along the way but bounced back fast; smooth skin—lines are actually fading. And I’m sleeping 7, 8 sometimes 9 hours a night. At first glance, it seems expensive, but after calculating how much I spent on supplements that were not producing the kind of results I get from Adapt Naturals, I realize I’m saving in more ways than one. Try these supplements. Your body will thank you.”

    —Meg P.
  • “I’ve tried a lot of different supplements to help with my overall wellbeing. As a personal trainer and nutritionist, the Core Plus Bundle has been the best I’ve tried! With my personal health issues; homozygous MTHFR C677T variant and a fast COMT, this bundle has been life changing! Give it a try! I look forward to see the positive changes in my family and friends! Thank you Chris for creating such a great product!!!”

    —Bri O.
  • “I’ve been taking the Adapt Naturals full Bundle for a few months now and I feel amazing! I have more energy and my sleep is better even between time zones. When I started taking Adapt Naturals I stopped taking all other supplements. I’m saving money and feeling good with the confidence my body is getting what it needs. I highly recommend this product.”

    —Scott A.
  • “These have been a game changer. They don’t make me sick to my stomach and Im feeling so much better even after just a month. They are working!”

    —Shavonne L.
  • “I started taking the core plus bundle about 3 months ago. I’ve had excellent energy, haven’t been sick even when those around me are, and lost 10lb by doing the bodyweight training program in the free reset app. Highly recommend. Many say that multi-vitamins and supplements are a waste of money but this bundle has been absolutely worth it for me.”

    —Kealani T.

Meet the Core Plus Bundle—Your New Daily Stack.

Get the nutrients you need for optimal health and performance in a streamlined daily stack.

Most of us no longer get the nutrients we need, thanks to declining soil quality, a growing toxic burden, and other challenges in the modern world.

With the Core Plus bundle from Adapt Naturals, you can:

✓ Supercharge your nutrient intake so your brain can thrive

 Streamline your daily supplement routine—and save money and time

 Have confidence that you're getting everything you need (and nothing you don't)

Core Plus is backed by over a decade of research and clinical experience and fueled by high-quality, evidence-based ingredients you can trust.

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What makes the Core Plus Bundle stand out?

  • Evidence-Based

    The products and ingredients in Core Plus are backed by peer-reviewed research and the extensive clinical experience of our founder, globally-renowned Functional Medicine clinician, author, and educator Chris Kresser.

  • Easy to Absorb

    Most supplements contain cheap, synthetic ingredients that are poorly absorbed. Core Plus contains food-based or bioidentical nutrients for optimal absorption and assimilation.

  • Saves Money & Time

    Core Plus can save you money and time because it dramatically simplifies your supplement routine. Better supplementation = fewer supplements. We’ve done the hard work and research so you don’t have to!

What's Included In Core Plus?

Bio-Avail Multi: A Multi + Greens & Reds Powder in One Bottle

A multivitamin should be the cornerstone of any supplement strategy.

Bio-Avail Multi is a multivitamin, multimineral, and phytonutrient blend that replicates an ancestral whole-foods, nutrient-dense diet. 

Unlike most multis on the market made with cheap and synthetic compounds, all the ingredients in Bio-Avail Multi are food-based, naturally occurring, or bioidentical. 

It’s like a multi and greens and reds powder all in one!

Bio-Avail Organ: A Food-Based Nutrient Powerhouse

When it comes to nutrient density, organ meats win hands-down. 

A single serving of liver meets the Recommended Dietary Allowance (RDA) for vitamin B12 for an entire week and far exceeds the daily RDA for vitamins A and B2 (riboflavin) and copper.

While most of us don’t eat organ meats regularly, Bio-Avail Organ has you covered with a blend of five freeze-dried bovine organs—liver, heart, kidney, pancreas, and spleen—sourced from 100% grass-fed, grass-finished, free-range New Zealand cattle. 

Taking Bio-Avail Organ daily is equivalent to eating about 4 ounces of organ meat a week.

Bio-Avail Myco: Brain, Immune and Cardiovascular Support

Mushrooms are nothing short of a natural wonder. 

They have a 7,000-year track record of supporting health and well-being—from protecting our brains to supporting immunity and cellular health to maintaining healthy blood sugar and cholesterol levels. 

Bio-Avail Myco is a blend of the eight mushrooms that have shown the greatest health benefits in scientific studies: reishi, chaga, lion’s mane, cordyceps, maitake, shiitake, agaricus, and turkey tail.

Bio-Avail Mag: The Missing Link for Sleep and Metabolic Health

Magnesium promotes sleep and relaxation, helps maintain normal blood sugar, supports bone health, and much more.

Each 2-capsule serving of Bio-Avail Mag contains 300 mg of magnesium in a chelated formula—meaning it gets absorbed quickly and is far less likely to cause gastrointestinal symptoms like loose stools and bloating, unlike inferior forms of magnesium.

Studies suggest that the average American consumes 200 to 300 mg less magnesium daily than needed! We created Bio-Avail Mag to ensure you get enough of this critical and health-boosting nutrient.

Bio-Avail E+: Promotes Healthy Skin, Bones, and Cells

89 percent of Americans don’t get enough vitamin E. But supplementing with the most common form, alpha-tocopherol, has been linked to an increased risk of heart disease and cancer.

Bio-Avail E+ is contains 300 mg of delta- and gamma-tocotrienols, a recently discovered form of vitamin E that has greater health benefits than alpha-tocopherol—and none of its long-term risks. 

It can protect the brain, improve lipid profiles, promote cellular health, support healthy blood sugar levels, and improve bone health.

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Learn What The Core Plus Bundle Can Do For You

Conquer nutrient deficiency and take back your health!

Did you know that humans need at least 30 micronutrients to function optimally? Virtually every process that happens in the body requires a vitamin, mineral, or other nutrients.

This explains why nutrient deficiencies can lead to a wide range of problems, from low energy to poor sleep and weight gain to an increased risk of chronic disease and premature death.

Sadly, the latest research suggests that most Americans fall short on not just one but several essential vitamins and minerals.

Add back in what the modern world has squeezed out.

Our busy, fast-paced lives make it difficult for most of us to eat a clean, whole-food diet 100 percent of the time.

Even if we do, declining soil quality, a growing toxic burden, and other challenges in the modern world have made it difficult—if not impossible—to meet our nutrient needs through food alone. 

Supplements can help close the gaps and ensure that we’re getting all of the nutrients we need to thrive and live a long, healthy life. 

But not just any supplements will do…

Supercharge your health with full-spectrum, bioavailable nutrients.

Frankly, most supplements on the market aren’t worth taking. 

They’re made with cheap, synthetic ingredients, don’t have enough of what we need (or too much of what we don’t), and don’t contain the phytonutrients that promote optimal health and longevity.

To truly benefit from supplementation, you need food-based, highly absorbable nutrients that cover all of the bases—from essential vitamins and minerals like B12, vitamins C and D, iron, zinc, and magnesium to plant nutrients like bioflavonoids, polyphenols, and beta-glucans.

The Core Plus covers your bases with the nutrients you need to feel and perform your best and live a long, healthy life.

Signs You Need the Core Plus Bundle

Low energy levels or chronic fatigue

A weakened immune system or frequent illnesses

Brain fog, poor memory, trouble concentrating

Skin problems, brittle hair and nails

Difficulty falling or staying asleep

Nutrient deficiencies due to poor diet or lifestyle

What You'll Feel Using the Core Plus Bundle

  • Increased energy levels and vitality

  • Improved mental clarity and cognitive function

  • Deeper and more restorative sleep

  • Enhanced immune system support and resilience

  • Correction of nutrient deficiencies for improved overall health

  • Greater endurance and support for an active lifestyle

  • Promotion of overall well-being and healthy aging

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

"I'm excited about Adapt Naturals and Bio-Avail Multi. Chris is a leading clinician, educator, and researcher in the Functional Medicine space. I've learned a lot from him about nutrition and supplements over the years, and I know his products are fueled by high-quality, evidence-based ingredients you can trust."

Dr. Mark Hyman MD

14-time New York Times best selling author and founder of the Cleveland Clinic Center for Functional Medicine

"Chris Kresser is one of the sharpest minds in the functional / integrative medicine space. I have reached out to Chris many times when working to unravel my own health journey and his insights have always been incredible. Given all that, I'm super excited for the release of Adapt Naturals line of supplements, especially Bio-Avail Multi. Chris and I are aligned in that we believe the bulk of our nutrition should come from whole, minimally processed foods, but we also recognize that the right supplement, at the right time can 'change everything.'"

Robb Wolf

Former research biochemist and 2-time New York Times bestselling author of The Paleo Solution and Wired To Eat.

"I can't think of a better person to formulate supplements than Chris Kresser. I trust his ability to skillfully combine ancestral wisdom with modern science and cutting-edge research. Taken together, the products offer a well-rounded and complete way to boost your nutritional status. I am excited about this high-quality, comprehensive new product line - I strongly recommend it!"

Dr. Akil Palanisamy MD

Harvard-trained physician, author, speaker, and holistic medicine expert in integrative and functional medicine

"I trust Chris Kresser with my life, and you will too."

Sara Gottfried MD

Harvard Trained Physician and New York TimesBestselling author of The Hormone Cure

Order the Core Plus Bundle Today and Start Living Your Best Life!

Special offer! Get free shipping plus receive >$60 in discounts and value with your Core Plus order!

Core Plus Bundle

30 day supply

Save $15 on this bundle, get FREE shipping & handling ($14.95 value USA only), plus a free one-year supply of Vitamin D3/K2 ($34.95 value).

**Order now to get >$60 in discounts and value!**

$249.92 199.97

+Free USA shipping& a free bottle of Vitamin D3/K2

Buy Now ($199.97)
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About Your Free Vitamin D3/K2

Vitamin D is critical for bone, heart, metabolic and immune health. Sadly, statistics show that 92 percent of Americans don’t get enough. Bio-Avail D3/K2 contains 1,000 IU of vitamin D3 per serving in a highly absorbable liquid form. It also contains 120 mcg of vitamin K2, which has additional cardiovascular and bone health benefits. A single bottle of Bio-Avail D3/K2 contains 600 servings—up to a one-year supply of these essential vitamins!

Get a FREE bottle of Vitamin D3/K2 when you purchase the Core Plus Bundle today!

60-Day Money-Back GuaranteeWe stand behind the quality of our products, and we want you to be completely satisfied with your order.

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.

Your Questions Answered

Each product in the Core Plus bundle contains a 30-day supply when taken at the recommended dose.

We recommend taking Core Plus daily with food for best results and following this schedule for ease and convenience:

With breakfast:

  • Bio-Avail Multi (2 capsules)
  • Bio-Avail Myco (4 capsules)
  • Bio-Avail Organ (3 capsules)

With dinner:

  • Bio-Avail Multi (2 capsules)
  • Bio-Avail Organ (3 capsules)
  • Bio-Avail Mag (2 capsules)
  • Bio-Avail E+ (1 gel cap)

If you practice intermittent fasting and do not eat in the morning, we suggest taking the “with breakfast” dose of capsules with your first meal of the day, and the “with dinner” dose of capsules with your second meal of the day.

Yes, all products in the Core Plus bundle are made without gluten and GMOs, and are also vegetarian.

Most people see positive changes like more energy, deeper sleep, and better mental and physical performance within a couple of weeks. That said, nutrient deficiencies take years—or even decades—to develop, and they can take months to fully correct. We suggest giving the Core Plus bundle at least three months before determining whether it works for you.

One of the products in the Core Plus bundle, Bio-Avail Multi, contains a substantial dose of vitamin K1/K2 (450 mcg), which may interfere with blood-thinning medications like warfarin. If you’re taking one of these medications, we recommend that you check with your medical provider before starting the Core Plus bundle and Bio-Avail Multi.

When you buy the Core Plus Bundle, shipping is FREE for all orders (U.S. only).   

We ship most orders within one business day. Most orders take 2-3 days to arrive once shipped. 

Unfortunately, we do not ship internationally at this time. 

The products in the Core Plus bundle are manufactured in a U.S. facility that meets the NSF’s rigorous GMP (Good Manufacturing Practices) regulatory standards.

As noted above, nutrient deficiencies can take years (or even decades) to develop and many months to correct. For this reason, we suggest that you take Core Plus for at least three months before determining whether it works for you. 

That said, we know that each individual is different, and we want you to be completely satisfied with your purchase. If you’re unhappy with your order for any reason, simply contact us, and we’ll give you a full refund with no questions asked!

We recommend taking the full Core Plus bundle for the best results. But we also know that, for various reasons, some customers may be unable to take all the products in the bundle. If you’d like to order individual products, pleasevisit our website.

Customer Reviews

Based on 162 reviews
Deedee Hamilton
Best supplements

Best supplements I’ve ever had! My only 2 complaints are that I wish the calcium was in the multivitamin and it would be nice to just take it once a day not twice unless your that deficient

Hi Deedee, Thank you for reviewing our core plus bundle. We understand your concern, However, It does not contain calcium, iodine, and iron because Chris believes these nutrients should be individually doses (and most forms of calcium supplements are problematic when taken long term. We hope this information helps. All the best on your supplement journey!

diana hunter-carlson
Best health in years

I have been taking the Bundle for about two weeks - I have been sleeping better, have more mental clarity, and at 77 years of age - I have energy I didn't think was possible - probably more energy than when I was younger. Thank you!!!

Hi Diana, Thank you for sharing your experience with our Core Plus Bundle. We are pleased to know you are getting the benefits you need from this bundle. We appreciate you supporting Adapt Naturals brand. Best of health!

Cyndy Jacobsen
Results you can see!

We are extremely health conscious in my family and eat fairly clean paleo. So we don't usually see a big result from the many supplements we have taken. The Core Plus Bundle was amazing right from the start. My fingernails, which had broken off and been brittle my whole life, were suddenly strong. Imagine the internal results! TMI but bowel issues resolved for both my husband and I. We got the subscription for all three in our household and are quite grateful for this line of products. Getting the subscription put our supplements on auto pilot. Thanks.

Hi Cyndy, We are so pleased to hear our Core Plus Bundle is working well for you and other family members. Thank you so much for supporting Adapt Naturals. Best of health!


Expensive and it’s hard to tell if it helps but I’m still taking it

Armen Alexanian
Natural vitamins make all the difference

Store bought vitamins turn my pee different fluorescent colors. Adapt Naturals is not just higher quality, it's practically in a different category entirely. I open the capsules and mix it with my coffee and protein powder. I really like the taste. This is now part of my overall health regimen. At my age I need to take every measure possible to retain my health. When I decided to take vitamins I knew I wanted to do it differently. I thought to myself: Who is the most trusted name in nutrition? It's Chris Kresser.

Hi Armen, Thank you for trusting us with your health. We are thrilled to hear our Core Plus bundle is working great for you even when you open the capsules. Thank you for sharing your experience with us. All the best in your supplement journey!