nutraMetrix Isotonix® Vitamin D with K2 - Single Bottle (30 servings)

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How nutraMetrix Isotonix® Vitamin D with K2 Benefits You?


nutraMetrix Isotonix Vitamin D® with K2 contains vitamin D3, the metabolically active form of vitamin D, along with vitamin K2, a form of vitamin K which supports vascular health and calcium utilization. Vitamin D plays an important role in bone health, heart health and immune support, while working with vitamin K to support normal absorption of calcium and promote healthy arteries.

nutraMetrix Isotonix® Vitamin D is the first of its kind to deliver both of these powerful vitamins with isotonic delivery. Vitamin K is included in nutraMetrix Isotonix® Vitamin D with K2 because of its unique partnership with vitamin D. Vitamins K and D work together to support calcium absorption and utilization. Vitamin K supports the normal delivery of calcium to the bones and promotes healthy arteries.At least two naturally-occurring forms of vitamin K have been identified and are known as K1 and K2. While there are many similarities between these two forms of vitamin K, they are distinguished by their important differences.

The most significant difference between K1 and K2 is their chemical structure which results in different pharmacokinetic properties. Vitamin K1 is retained primarily in the liver where, at high doses, it may interfere with the action of warfarin and other anticoagulant medications. Vitamin K2 has a different mechanism of action. It is transported primarily to bones and blood vessels. Vitamin K2 helps to maintain bone mass, support calcium utilization and promote elasticity of blood vessels. Some studies have concluded that vitamin K2 does not interfere with anticoagulant medications.

However, most products containing vitamin K (including K1 and/or K2) warn users taking anticoagulants not to take the product. If you are currently taking warfarin or another anticoagulant medication, you should consult your physician before taking any product containing vitamin K1 or K2.

How nutraMetrix Isotonix® Vitamin D with K2 Benefits You?

Primary Benefits of nutraMetrix Isotonix® Vitamin D with K2*


Primary Benefits of nutraMetrix Isotonix® Vitamin D with K2*
  • Helps maintain bone health
  • Supports the maintenance of bones
  • Promotes normal bone mineral density/mineralization
  • Helps maintain bone density/mass
  • Helps to maintain bone mass/structure by supporting normal osteoclast activity
  • Promotes the proper synthesis and functioning of important proteins essential for the proper utilization of calcium
  • Helps maintain cardiovascular health
  • Promotes healthy arteries
  • Promotes healthy vascular system
  • Promotes elasticity of blood vessels
  • Helps maintain normal blood pressure
  • Promotes healthy cells
  • Supports immune health
  • Women with low bone mass density have been found to be deficient in Vitamin K

Product Classifications



Gluten-Free - The finished product contains no detectable gluten (<10ppm gluten)


No Detectable GMOs - The finished product contains no detectable genetically-modified organisms


Vegetarian - This product is vegetarian


Isotonic-Capable Drinkable Supplements - Easy-to-swallow supplements in liquid form are immediately available to the body for absorption


Quality Standards - GMP Operations and Standardized Ingredients


Checked For: Heavy Metals, Microbiological Contaminants, Allergens, Residual Solvents, Potency, Purity and Identity

Product Classifications

Isotonix Delivery System


Isotonix Delivery System
Isotonix - the World's Most Advanced Nutraceuticals

Isotonic, which means “same pressure,” bears the same chemical resemblance of the body’s blood, plasma and tears. All fluids in the body have a certain concentration, referred to as osmotic pressure. The body’s common osmotic pressure, which is isotonic, allows a consistent maintenance of body tissues. In order for a substance to be absorbed and used in the body’s metabolism, it must be transported in an isotonic state.

Isotonix dietary supplements are delivered in an isotonic solution. This means that the body has less work to do in obtaining maximum absorption. The isotonic state of the suspension allows nutrients to pass directly into the small intestine and be rapidly absorbed into the bloodstream.With Isotonix products, little nutritive value is lost, making the absorption of nutrients highly efficient while delivering maximum results.

Powerful Vitamins with Powerful Delivery


Key Ingredients


Vitamin D3 (Cholecalciferol) 125 mcg
Vitamin D is a fat-soluble vitamin that is found in some foods and endogenously produced when sunlight strikes the skin and activates vitamin D synthesis. Vitamin D promotes the efficient intestinal absorption of calcium, primarily in the duodenum and jejunum by supporting the synthesis of calcium-binding proteins to promote normal calcium absorption and retention. Vitamin D also promotes the normal formation of bone and normal bone growth and bone remodeling by osteoblasts and osteoclasts. Vitamin D deficiency can be caused by factors such as lack of exposure to sunlight, reduced skin synthesis of vitamin D, lower dietary intake, impaired intestinal absorption and reduced metabolism to active forms of vitamin D by the kidneys, all of which increase with aging. Deficiency has been linked to numerous health concerns, and insufficient levels of this vitamin are associated with weak bones and muscle weakness. In addition to promoting strong bones, vitamin D also has other roles in health, including supporting the body’s normal modulation of neuromuscular function and immune function. Vitamin D has been shown to support immune-modulation, and it is thought that supplementation promotes immune health by promoting the body’s normal regulation of T-cell function. In reference to cellular health, vitamin D supports the modulation of many genes that are responsible for encoding proteins that regulate normal cell cycle activity. Vitamin D levels have been strongly correlated to healthy cells. Lastly, through its interaction with VDR (vitamin D receptor), vitamin D supports the healthy expression of the gene encoding renin, thus helping to maintain healthy blood pressure.

Vitamin K2 (Menaquinone-7) 45 mcg
Vitamin K is a fat-soluble vitamin found in meat, eggs, dairy and natto. Although a fat-soluble vitamin, the body stores very little K2, and its stores are rapidly depleted without regular dietary intake. Natural vitamin K2, also known as menaquinone-7 (MK-7), is the most bioavailable form of K2 and has the longest half-life in the blood of any form of vitamin K. The Japanese soy food natto is particularly rich in menaquinone-7 (MK-7). Studies of natto consumption in Japan have linked menaquinone-7 to bone and cardiovascular health. The correlation of vitamin K to cardiovascular and bone health directly focuses on supporting proper calcium utilization, whereby adequate metabolism of calcium supports arterial and bone health. This is often referred to as the calcium paradox. The calcium paradox is explained simply as getting calcium in the right place (i.e., into the bone structures instead of the arterial vessel walls.) These events are dependent upon the synthesis of the vitamin K-dependent proteins osteocalcin and matrix Gla protein in a process called carboxylation. The carboxylation of these proteins is a post-translational step; that is, osteocalcin and matrix Gla protein are translated from their respective messenger RNA and then modified by enzymes to the active forms. These carboxylated forms support the healthy binding and releasing of calcium. This reaction is essential for optimal and healthy utilization of calcium. Vitamin K2 promotes the synthesis of proteins involved with calcium utilization, thereby supporting bone retention and arterial health. While Vitamin D supports the healthy regulation and synthesis of osteocalcin, the mineral-binding capacity of this protein requires vitamin K-dependent carboxylation and is thought to be related to bone mineralization. Gas6 is a vitamin K-dependent protein found throughout the nervous system, as well in the heart, lungs, stomach, kidneys and cartilage. Although the exact mechanism of its action has not been determined, Gas6 appears to be a cellular growth regulator involved in cellular activities such as cell adhesion, cell proliferation and protection against apoptosis.

Potassium (Bicarbonate) 150 mg
Foods rich in potassium include fresh vegetables and fruits, such as bananas, oranges, cantaloupe, avocado, raw spinach, cabbage and celery.

Potassium is an essential macromineral that helps to keep fluid balance. It also plays a role in a wide variety of biochemical and physiological processes. Among other things, it promotes the normal transmission of nerve impulses, the normal contraction of cardiac, skeletal and smooth muscle, the normal production of energy, the normal synthesis of nucleic acids, the maintenance of intracellular tonicity and the maintenance of normal blood pressure. Potassium promotes muscle relaxation and supports normal insulin release. It also promotes normal glycogen and protein synthesis. Potassium is an electrolyte that promotes proper heartbeat, and it is important in supporting the normal release of energy from protein, fat and carbohydrates during metabolism.

Potassium also promotes the normal regulation of water balance. Potassium promotes the normal elimination of wastes and generally contributes to a sense of well-being. Potassium is stored in the muscles.* Some symptoms of potassium deficiency include poor circulation, earaches, inability to sleep, muscle weakness and water retention.

Sodium and potassium are two of the most important ions in helping the body maintain the homeostatic equilibrium of fluids.

FAQs


1. Why is vitamin K included in nutraMetrix Isotonix® Vitamin D with K2?
Vitamin K is included in this product because of its unique partnership with vitamin D. Vitamins K and D work together to promote healthy calcium absorption and utilization. Vitamin K supports the delivery of calcium to the bones and helps maintain arterial health.

2. Is nutraMetrix Isotonix® Vitamin D with K2 safe for people on anticoagulant medications?
Some studies have concluded that vitamin K2 does not interfere with anticoagulant medications. However, most products containing vitamin K (including K1 and/or K2) warn users taking anticoagulants not to take the product. If you are currently taking warfarin or another anticoagulant medication, you should consult your physician before taking any product containing vitamin K1 or K2.

3. How do I take nutraMetrix Isotonix® Vitamin D with K2?
Mix one capful of nutraMetrix Isotonix Vitamin D with K2 with 2 ounces of water. Take one serving daily.

4. Is it safe to take more than one serving of this product daily?
One serving daily of nutraMetrix Isotonix® Vitamin D with K2 is recommended. Check with your physician before taking additional daily servings of this product.

5. Is there a toxicity level for Vitamin D?
The recommended daily Upper Limit for vitamin D is 10,000 IU, however, safety studies indicate that up to 40,000 IU may be safe for most people. If you wish to take more than one daily serving of this product, you should check with your physician.

6. What are dietary sources of Vitamin D?
Foods rich in vitamin D include cod liver oil, salmon, mackerel and tuna.

Science


  • American Journal of Epidemiology. 168(8):915-24, 2008. · Deluca H et al. Vitamin D: its role and uses in immunology. FASEB Journal. 15(14):2579-2585, 2001.
  • Hayes C et al. The immunological functions of the vitamin D endocrine system. Cellular and Molecular Biology. 49(2):277-300, 2003.

Reviews


Customer Reviews
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Displaying reviews  1 - 5 of 128

on

  • Shop Consultant

My product reivew

I absolutely love the Isotonix Vitamin D with K2. Isotonix have the best absorption.

Response from Customer Service:
May 6, 2026

Thank you so much for your wonderful review of Isotonix® Vitamin D with K2! We're thrilled to hear how much you love the product and appreciate your kind words about its absorption. Your feedback means a lot to us, and we’re grateful for your continued support and loyalty. Thank you for being a valued customer!

on

  • Shop Consultant

Sugary supplement

It contains sugar, fructose, and maltodextrin which are not good for health. Especially with people who had diabetes.

Response from Customer Service:
April 23, 2026

Thank you so much for your feedback on Isotonix® Vitamin D with K2. We truly appreciate you taking the time to share your thoughts with us.

The small amount of sugar included in Isotonix products is necessary to facilitate our unique isotonic delivery system, which helps maximize nutrient absorption. Please be assured that we strive to source the highest quality ingredients for our customers’ well-being.

We understand your concern, especially when it comes to managing conditions like diabetes. We always recommend that individuals with medical conditions or those taking medication consult their treating physician before starting any new supplement. Only your healthcare provider can determine what’s appropriate for your specific needs.

For diabetic patients, if their physician approves the use of Isotonix products, we suggest they consider replacing a serving of fruit with a serving of Isotonix, as guided by their physician. Ultimately, your healthcare provider is the best resource when it comes to managing your dietary needs.

Thank you again for your feedback. If you have any further questions or need more information, please feel free to reach out.

on

Great product

I am loving these vitamins

Response from Customer Service:
April 20, 2026

Thank you so much for your wonderful review! We're delighted to hear that you're loving Isotonix® Vitamin D with K2. Your feedback means a lot to us—thank you for being a valued member of our community!

on

Great product

Just add water and mixes itself. I cannot take vitamin D in pill form, harsh on my stomach. This is very gentle and apparently works very well as shown in my bloodwork results! So glad this product exists and known by my doctor who recommended this product to me.

Response from Customer Service:
April 15, 2026

Thank you so much for your wonderful review! We're delighted to hear that nutraMetrix Isotonix® Vitamin D with K2 is easy to use, gentle on your system, and recommended by your doctor. Your experience and feedback mean a lot to us—thank you for being a valued member of our community!

on

A must have.

In my household Vitamin D has to be a staple. I don't notice it so much in myself, but my 19 year old son is a completelyl different (more pleasant) person when he's taking Vitamin D. Tastes great.

Response from Customer Service:
March 3, 2026

Thank you so much for your wonderful review! We're delighted to hear that Isotonix® Vitamin D with K2 has become a staple in your household, and that your family enjoys the taste and benefits. Your feedback means a lot to us—thank you for being a valued member of our community!

One or more of the reviews shown may have been posted by a nutraMetrix or SHOP Consultant (An independent distributor of nutraMetrix and Market America products) or a nutraMetrix HP (A health professional who is an independent distributor of nutraMetrix and Market America products).