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Clinical Effects K2 + D3 is a health and immune-supporting complex of vitamins K2 and D3 with Calcium Carbonate and pure BioPerine® for long-term health benefits.

Take K2 + D3 twice daily to (1) Maximize bone strength, (2) Support your immune system, (3) Optimize cardiovascular health, (4) Improve energy levels, (5) Positive mood support, and (6) Encourage long-term health and vitality.

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A+ Rated Business

Vitamin K2 + D3

Strengthens Your Bones

Give your bones the calcium they need without risking arterial calcification.

Immune Health / Protection

Support healthy immune system function.

Good For Your Heart

Keep your heart and cardiovascular system running strong with K2 + D3!

Long-Lasting Energy

Vitamin D3 is known to play a key role in healthy energy levels.

Mood Support

Healthy vitamin D levels for positive mood support.

Improves Health & Wellness

Maximize your all-around health across multiple vital systems in the body.

Science-Backed Formula

K2 + D3 features clinically proven ingredients to safely maximize your health.

Protect your health with natural, clinically studied ingredients. 

WHY k2 + d3

Doctors recommend Vitamin D3 because it strengthens bones, supports the immune system, and supports a variety of basic health functions. Interestingly, the way it strengthens bones is by maximizing Calcium absorption and calcifying hard tissues.

But here’s the problem: while the body’s hard tissues need plenty of Calcium, it’s dangerous in other areas. (For example, when Calcium saturates in arteries, it leads to major problems like heart disease.)

Thankfully, when taken with Vitamin D3, Vitamin K2 protects soft tissues and ensures Calcium only goes where it’s needed. Clinical Effects K2 + D3 combines the highest-quality Vitamins K2 and D3 along with Calcium and BioPerine® for enhanced bioavailability.


Over 40% of adults are deficient in Vitamin D which weakens the immune system and increases risk for a variety of serious health problems.


Since dietary sources of Calcium contain only trace amounts of this key mineral in maintaining a strong, healthy body, supplementation is important.


Vitamin K2 reduces health risks, promotes heart and brain health, reduces inflammation, and protects soft tissues from calcification.


K2 + D3 features BioPerine® from all-natural peppercorn standardized to 95% Piperine for optimal nutrient metabolism within the body.


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Ashley Ingram

I have tried a lot of solutions for my anxiety including prescription (which made it worse). The Vitamin D3 with K2 were my last resort and they have worked well.

It took a little while but now I have 3x more energy than I used to. It has helped tremedously in my professional life.

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Tami Moore

I have noticed a huge difference in inflammation levels after I started taking your Vitamin D with K2. The K2 was key here.

At last report my D levels were above 60. I am super happy with your customer support team who answered my questions with patience. Kudos!

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Melvin Phillips

These are definitely good quality as my reading came back last week with a higher Vitamin D count. My doc had me tested for low D and found I was lacking considerably.

I bought one with K2 because of a lot of research that has come out lately supporting the combination.

In short, I am happy to buy again from you guys!

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Nina Joseph

This is my third order. It was late by 2 days (thought you guys should know this).

My neuro friend recommended your brand about 4 months ago because of the BioPerene in your ingredient list. He said it helps with better absorption of the vitamins.

I am not low on Vitamin D. I take these for anxiety issues, plus the immunity benefits that come with it. So far I am happy with your product and plan to continue for the foreseeable future.

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Craig Austin

At 65 I am challenged with low energy and a lot of pain in my joints.

I am so glad I found your product. In the last 2 months I can't tell you what a difference these vitamin pills have made.

I am able to spend more time with my grandkids, which is a huge blessing. God Bless!

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Tawny H.

Love the reminder emails! It is easy to reorder and the products are clean, safe and effective! Just what I was looking for!!

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I am just taking the vitamins - and I also started D3 and Zinc to help overcome COVID, so its hard to say anything about it? 

I just know that I wanted to a good overall vitamin with calcium being a women in her mid-50's. So, I guess its good for me? Now do you have the magic weight loss pill? ha!

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Marrianne N.

Improved my energy levels

I just started using the Vitamin D supplement for the past 3 days. I had parathyroid surgery a month ago and my Vitamin D level had still not recovered.

I was told to take Vitamin D supplement with K2. (K2 is supposed to protect soft tissue from calcification) since I had damage due high calcium levels for years due to hyperparathyroidism, I thought it would be prudent.

I haven't noticed any dramatic effect, but my energy levels seemed to have improved some already. I think in the long term, my immune system will be stronger and many other thing will improve after a month or so.

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Johnathan W.

Just what I was looking for

I was told to start taking vitamin D and that it needs to be combined with K and calcium. This product has everything I was looking for at a decent price.

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Bobby M.

My Vitamin D levels are up

My doctor told me I was low on vitamin D. I’d been taking these for a while and had my levels rechecked and they are up. Looks like these are doing the job.

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Jay T.

Good source of vitamin D.

I don’t get a lot of sunlight between where I live and working an office job. I seemed to be getting more fatigued and felt stiff. After taking these for a couple months I feel more energy and am less achy.

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Frequently Asked Questions

  • What is K2 + D3?

    K2 + D3 is an all-natural dietary supplement formulated to promote a variety of health benefits including immune system support, stronger bones, as well as heart and brain health. Specifically, it ensures the full health-promoting benefits of Vitamin D are utilized while protecting the body's soft tissues from the dangerous impacts related to Calcium saturation.

  • Why is K2 + D3 better than just D3?

    Most diets only contain trace amounts of the critical mineral Calcium. One of the ways that Vitamin D works is by maximizing your body's absorption of Calcium to keep it at high enough levels throughout the body. This is great for strong tissues like bones and teeth, but it can be detrimental to soft tissues like arteries where the hardening effects of calcification can lead to heart failure or other medical issues.

    Nevertheless, Vitamin D plays a key role in numerous aspects of basic health and is therefore one of the most important vitamins recommended by doctors for daily supplementation. A deficiency in Vitamin D (called Hypovitaminosis D) causes serious problems; but having too much Calcium in soft tissues also comes with risks. For this reason Vitamin K2 is taken in combination with Vitamin D3 to ensure that Calcium reinforces your body's hard tissues while at the same time protecting your soft tissues from calcification.

  • How do I know if I’m deficient in Vitamin D?

    Upwards of 40% of adults are deficient in Vitamin D which poses a range of health risks including obesity, a weakened immune system, greater risk for diseases, bone and tooth deterioration, and other issues like high blood pressure. If you are concerned about a possible deficiency, speak with your doctor about getting blood work done to determine the levels of important vitamins, minerals and nutrients in your body.

  • How does K2 + D3 work?

    K2 + D3 works by combining the power of Calcium, Vitamin D3 and Vitamin K2 to deliver some of the most powerful and wide-ranging health benefits available through dietary supplementation without the typical risks associated with calcification of soft tissues. Vitamin D is a heavy-hitting vitamin which plays an important role in your health but must be modulated by Vitamin K2’s protection of soft tissues. K2 + D3 is a simple, all-natural supplement that can make a tremendous difference in your long-term health and vitality.

  • Does K2 + D3 cause any side effects?

    Most people do not experience side effects when using K2 + D3. If you have any questions, feel free to contact customer support. If you are concerned about possible contraindications with prescription medications or you have any serious medical conditions, speak with your physician before trying K2 + D3.

  • I have a well-rounded diet. Do I still need K2 + D3?

    A great diet definitely supports optimal health, but countless basic nutrients are not available in substantial amounts through food. For example, most vegetables are grown in soil that once had vibrant mineral profiles (including Calcium), but after centuries of agriculture the minerals have been largely depleted. For that reason and many others, dietary supplements are recommended as a simple way to boost your health.

  • How soon will it start working?

    K2 + D3 starts working as soon as it enters your bloodstream. This takes approximately 20-60 minutes from consumption as the synergistic effects of Calcium, Vitamin D and Vitamin K2 begin supporting various physiological systems and processes in the body. Many people feel the effects the first time they take K2 + D3, and continue experiencing remarkable health improvements over time.

  • Is this product safe?

    Yes! K2 + D3 is formulated with natural ingredients indicated as being safe for consumption by the FDA. We mix and bottle our products in FDA-certified facilities with rigorous quality controls at multiple points in the production process. If you are pregnant or nursing, consult with your physician before taking K2 + D3.

  • What are all the ingredients in K2 + D3?

    K2 + D3 contains four simple ingredients: (1) Vitamin D3 as Cholecalciferol, (2), Vitamin K2, (3) Calcium Carbonate, and (4) BioPerine® to amplify the therapeutic benefits of the other three compounds.

  • Can I get K2 + D3 in stores?

    K2 + D3 is exclusively available through Clinical Effects online. We are able to maintain such high quality standards and such competitive pricing by eliminating “middleman stores” and passing the savings onto our customers.

  • Will K2 + D3 reverse my medical condition?

    While K2 + D3 provides wide-ranging health benefits, it is designed to promote and maintain optimal health rather than treating any disease. If you have a serious medical condition, it is important to speak with a doctor before taking any new dietary supplement.

  • Do you offer a money-back guarantee?

    Yes. We protect every order with a 90-Day Guarantee. If you are not happy with your order of K2 + D3 for any reason, contact our Customer Support and we will be more than happy to process a hassle-free refund.





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