Alkaline 11A

Your solution for neutralizing acidity, easing indigestion, and promoting well-being. Made with safe, naturally sourced minerals and purified (RO) water, this potent alkaline concentrate helps restore your body’s balance and supports anti- inflammatory responses. As your acidity decreases, the taste will become milder, making it easier to incorporate into your daily routine within just a few days. Continued use helps protect against the effects of stress, aging, and an unhealthy diet or lifestyle.

  • Alkaline11 - Alkaline Concentrate - O4Nutrition MD

    Alkaline 11

    Alkaline 11

    $71.99
    $71.99

The Complete Nutrition for Post-Bariatric

Experience the power of comprehensive nutritional support with O4Nutrition's Post Bariatric Line. With two uniquely formulated products - Superfood and Calming Formulas - we bring together all the necessary ingredients to promote faster recovery and sustainable health following bariatric surgery. Designed in line with ASMBS guidelines, our supplements are your ideal partners on your post-surgery wellness journey.

Complete Nutrition Line

The Complete Nutrition Collection from O4Nutrition is a specially curated range of wellness supplements designed to optimize your health and vitality from the inside out.

Fitness Nutrition Line

Our products unite two synergistic components: O4N® Activated Stabilized Oxygen and plant-sourced liquid minerals.

We utilize our most potent stabilized oxygen formula (to enhance VO2 max) and optimize the uptake and use of critical nutrients for superior muscle performance.

This supports efficient energy use, mental clarity, and recovery from physical strains.

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Shop By Your Goals

  • Fitness Nutrition

    Elevate your athletic performance with our specially-formulated sports nutrition supplements

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  • Complete Nutrition

    Meet the nutritional demands of your busy life with our comprehensive, bioavailable supplements.

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  • Bariatric Nutrition

    Support your bariatric journey with our tailored, easily absorbable, nutrient-rich supplements.

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O4Nutrition M.D. Quality

  • Developed Through Sound Science

  • Top Rated and Reviewed

  • We Test & Re-Test For Quality

  • FDA-Registered Facility

  • GMP Certified Manufacturing

  • Made in the USA

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O4Nutrition Wellness Team

  • Hailey Esdaile

    Registered Dietitian

  • Cece Catena

    Registered Dietitian

  • Christopher Taglias

    MD, FACS, DABOM 

  • Dr. Ahmad Nooristani

    MD & Founder of O4Nutrition
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Be part of our passionate advocates' community that trust O4Nutrition for their journey towards optimal health and fitness.

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Becoming a member of the VIP Club is absolutely free, and you'll start enjoying the rewards immediately upon signing up.

Create your account now and receive a 100-point signup bonus as a welcome gift!

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O4Nutrition M.D.

Dr. Ahmad Nooristani, with over 15 years of medical experience, leads O4Nutrition M.D., focusing on breakthrough research in alternative medicine and bioavailable nutrition.

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Let customers speak for us

from 96 reviews
Delicious

I drink this at night a few hours before bed. The first week I didn’t notice much of a difference, but after week two I noticed how much deeper I’m sleeping! How much more relaxed I am at night. I will definitely be keeping this in my routine.

Tiffany
O4N Calming Formula
Delicious and clean

I’ve tried dozens of vitamin powders shakes and pills. O4 Nutrition is by far the best one I’ve ever had!

Tiffany
O4N Superfood Formula

I tried a few supplements since my surgery, and relax is by far the best. I feel healthier and my mood has improved. I will be sticking with this one

Margaret H*****
O4N Calming Formula

Finding the right supplement after bariatric surgery can be tough. This product has made a noticeable difference in my health. The taste is pretty good too.

Edward K.
O4N Calming Formula

My nutritionist recommended this one after my surgery. It's been a few weeks and I feel better. I have more energy and I'm sleeping better. I'm very satisfied with this product

William R.
O4N Calming Formula

I have noticed that my sleep is better and I feel more relaxed. The calcium and Vitamin D3 are a plus too.

Karen D.
O4N Calming Formula

My friend suggested this product after her surgery and I gave it a try after mine. I'm glad I did. My energy is up and I feel like my overall health has improved

Susan B.
O4N Calming Formula

After my surgery, I was overwhelmed with nutritional advice. Relax has made it easy. It's got everything I need and I can see the difference in my health. I will keep using this.

Charles P.
O4N Calming Formula

My doctor was really stressing on calcium and Vitamin D3 after my surgery. Relax Nutrition has been a game-changer. It's easy to use and I actually enjoy the taste.

Donna G.
O4N Calming Formula

Am a few months post-surgery and was looking for a supplement that fits my needs. It came recommended, and am glad I tried it. Energy level is up and I'm feeling pretty good

John C.
O4N Calming Formula

My digestion is better, and I have more energy

Nancy D.
O4N Superfood Formula

I started using it after my surgery and it's made a big difference. My energy is up and my digestion has improved. Great product!

HAROLD_RICHARDS
O4N Superfood Formula

This product is a lifesaver and has good price for everything that is included....

Mary E.
O4N Superfood Formula

After my surgery, I was so confused about what supplements to take. Xtreme Nutrition has made it so easy. It has everything I need, and I feel healthier overall

Richard K****
O4N Superfood Formula

This is a great product for someone like me who has undergone bariatric surgery and need to supplement good stuff

Josephine T.
O4N Superfood Formula