new formula
1 out of 5 star rating. 
Power Up Your Health
30 trillion
Vitamins and minerals support over 30 trillion cells in the human body – fueling processes from energy production to promote healthy growth and repair of tissue.
100%
Isotonix Multivitamin delivers 100% of your Recommended Daily Value of essential vitamins and nutrients
Chromium: An Unsung Hero of Metabolic Health
Step beyond ordinary multivitamins with a formula designed to do more than just fill nutritional gaps.
Our Isotonix® Multivitamin delivers a precise blend of methylated B vitamins, balanced micronutrients and essential trace minerals—including the standout star: Chromium. At 120 mcg per serving, this trace mineral plays a crucial role in supporting your body's normal glucose metabolism and helping to maintain healthy blood sugar levels—over three times the daily recommended value. Why does it matter? Chromium helps your body use insulin more efficiently, which is key for energy production and overall metabolic wellness.
The Isotonix Difference
Experience what a multivitamin should really feel like. Most multivitamins are trapped in tablets or capsules, forcing your body to do all the work to break them down, absorb, and utilize their nutrients. But nutritional value means nothing without absorption. Isotonix® Multivitamin delivers a carefully balanced blend of essential vitamins and minerals in an isotonic solution—the form your body prefers. This means rapid and controlled nutrient delivery. No need to digest a capsule or tablet. Get fast-acting, bioavailable support right when your body needs it.
Product Classification
Good Manufacturing Practices
Isotonic
Vegetarian
Gluten-Free
Dairy Free
Key Ingredients & Benefits
Methylcobalamin (B12), P5P-B6 and Folate (as 6S)-5-methyltetrahydrolfolic calcium)*
Supports energy, brain function, and stress resilience
Helps promote healthy methylation—a critical pathway for detox, DNA integrity, and hormones
Magnesium (as citrate)*
Supports muscle, nerve, and cardiovascular health
Plays a central role in over 300 enzymatic reactions
Vitamin D3*
Promotes the absorption of calcium and phosphorus
Supports the production of proteins involved in calcium absorption and storage
Antioxidants*
Vitamins C & E, selenium, beta-carotene
Helps support your cells and neutralize free radicals and environmental stressors
Zinc, Chromium, Manganese & Trace Minerals*
Metabolic support, glucose, thyroid and skin health
Delivered in highly bioavailable forms
Isotonix® Multivitamin for Ultimate Wellness
Even healthy diets might be missing out on essential vitamins and minerals. Help fill in those nutritional gaps with Isotonix Multivitamin, providing 100% or more of the Recommended Daily Value of essential vitamins and minerals. Nourish your body with a single serving each day, with options available with or without iron. No fillers. No binders, No nonsense. Just essential nutrients in a form that works.
Isotonix Delivery System
:05 minutes
Isotonix Liquid Vitamins
- Formulated to survive digestion.
- Delivers concentrated nutrients to the site of absorption.
- Contains no fillers or binders.
- No artificial color or flavors.
:40 minutes
Standard Vitamin Tablet
- Contains lab-created coatings and lubricants.
- Often contains artificial colors, nutrients and flavors.
- Limited absorption of nutrient utilization.
Frequently Asked Questions
Why is taking a vitamin supplement important?
Even with a balanced diet, many people fall short of getting the essential vitamins and minerals their bodies need daily. Modern farming practices, busy lifestyles, food processing, and dietary restrictions can all limit the variety and nutrient density of the foods we eat. Vitamin supplements help bridge these gaps, ensuring your body has the critical nutrients required to support energy production, immune defense, bone health, mental clarity, and overall vitality. By giving your body consistent access to essential nutrients, you help protect against deficiencies that can impact long-term health — empowering you to live better, every day.
Are Methylated Multivitamins Important?
Yes, for many people, methylated multivitamins are important. "Methylated" means certain vitamins—such as B12 (methylcobalamin) and folate (5-MTHF)—are provided in their active, bioavailable forms. This is crucial because up to 40% of the population has a genetic variation (such as MTHFR mutations) that makes it harder to properly process and activate standard forms of B vitamins. Methylated vitamins bypass this issue, supporting energy production, mental clarity, cardiovascular health, and detoxification more efficiently. Choosing a multivitamin with methylated nutrients helps ensure that your body can use these vitamins immediately — without unnecessary steps that could slow absorption or effectiveness.
If I Already Take a Quality Multivitamin, Do I Still Need Additional Magnesium, B Vitamins, or Vitamin D3?
While a high-quality multivitamin provides a strong nutritional foundation, certain nutrients—like magnesium, B vitamins, and vitamin D3—are often needed in higher amounts than what multivitamins typically supply. For example, magnesium plays a role in over 600 enzymatic reactions, yet many people fall short due to poor dietary intake. B vitamins, especially in times of stress or high energy demand, may be needed additional supplementation to support adequate levels beyond a standard multivitamin serving. Vitamin D3 is another key nutrient where higher, individualized supplementation is often recommended, especially for those with limited sun exposure or other lifestyle factors that may demand additional vitamin D3. In short: a multivitamin covers your base needs, but depending on your health goals, lifestyle, and lab results, targeted supplementation can provide optimal support.
Isotonix® Multivitamin Research Scope
0
The number of essential vitamins or. minerals the human body can make on its own. Making supplementation a prudent step to achieve a healthy metabolism.
90-95%
The amount of nutrients delivered for absorption from an isotonic solution, compared to the rates of 20-30% with a standard capsule or tablet.
-10%
Fewer than 10% of Americans meet adequate intake recommendations for key nutrients through diet alone.
*These statements have not been evaluated by the Food & Drug Administration, This product is not intended to diagnose, treat, cure or prevent any disease.
‡Sunactive® Fe is a registered trademark of Taiyo International, Inc.
Note: For child safety, this product has a child-resistant cap. The overcap doesn't fit the child-resistant cap, so it will be shipped separately for now if you'd like to use it for measuring and mixing.
Reviews
Break down of ratings: (58) 5 star ratings. (6) 4 star ratings. (3) 3 star ratings. (3) 2 star ratings. (2) 1 star ratings.
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The new formula is far too acidic - too much citrus. I even think the sugar content has changed. Only the large size bottle is available. The changes are making it impossible for me to keep ordering.
Response from Customer Service on 04/28/2025
Thank you for sharing your concerns about Isotonix® Multivitamin With Iron. We would like to inform you that the formula for this product has not changed. However, the 100g bottle has been discontinued, and currently, only the 300g bottle is available.
We understand how important it is for the product to meet your expectations, and a product specialist will reach out to you shortly to assist you further. We appreciate your feedback and your continued interest in Isotonix®, and we're here to help ensure your experience is positive.
Multivitamin
5 out of 5 star rating.
Absolutely Important! Must have item.
每天摄入高品质的功效营养素对健康太重要了！高效吸收率是其他同类产品没法媲美的，不要老想着便宜，便宜没有好货，健康是一，其他都是零。以前老从Costco买，现在只买这种等渗高吸收的。补一个月都比其他类似产品补两道三年强😃
Response from Customer Service on 11/18/2024
感谢您对 Isotonix® 含铁复合维生素的热情评价！我们很高兴听到您重视我们产品的质量和高吸收率。您致力于以高品质营养素优先考虑健康，这确实令人鼓舞。我们很荣幸能成为您的选择，我们感谢您的信任和支持。感谢您与我们分享您的美妙体验！
Thank you for your enthusiastic review of Isotonix® Multivitamin With Iron! We're thrilled to hear that you value the quality and high absorption rate of our product. Your dedication to prioritizing health with high-quality nutrients is truly inspiring. We're honored to be your choice over other options, and we appreciate your trust and support. Thank you for sharing your wonderful experience with us!
On Re-Order!
5 out of 5 star rating.
Does not taste chalky and my vitamin levels are on point. Perfect alternative if you cant swallow pills.
Response from Customer Service on 07/30/2024
Dear Valued Customer,
Thank you for sharing your positive experience with our nutraMetrix Isotonix® Multivitamin with Iron. We're delighted to hear that you found it to be a great alternative, especially if pills are not your preference. Your feedback about the taste and convenience is very valuable to us. If you have any further questions or need assistance, feel free to reach out!
Thank you again!
The Product Information
Life Saver!!!
5 out of 5 star rating.
I have been looking for multivitamins and an iron supplement that my tummy can break down and absorb without getting queasy! I love that they combined them as well. Just one little shot and I have my does for the day. I also have a history of not being able to use the restroom everyday a few times a day like a person should. Needing iron I took the tablets in the past but it stopped me from going. That was a bad painful situation. But now that I found my combination of multivitamins & iron in a powder form I'm so happy to be on a regular schedule of going. it works best for me to take it in the evening, while sleeping my vitamins are prepping for the next day. Love it!
Response from Customer Service on 07/16/2024
Dear Valued Customer,
Thank you so much for sharing your experience with our Isotonix® Multivitamin With Iron. We're delighted to hear that you found a product that fits your needs and routine so well. Your happiness and well-being are our top priorities, and it's wonderful to know that you're feeling great and staying regular. If you need anything else, we're here to help!
Thank you again,
The Product Information Team
Excellent product
5 out of 5 star rating.
This product is so helpful keeping me healthy.
Response from Customer Service on 11/07/2023
Dear Valued Customer,
Thank you so much for your kind words! We are delighted to hear that Isotonix® Multivitamin With Iron has been beneficial to you. It is always our aim to provide products that enhance people's lives, and we are so pleased that you are experiencing the positive effects!
Thank you again,
The Product Information Team
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