Vitamin K

Klair Labs

$31.99

Supports healthy bone structure, cardiovascular function, and immune response

Benefits and Features

Supports everyday wellbeing
Bioavailable combination of 5,000 IU of Vitamin D3 and 100 mcg Vitamin K2.
Enhanced support for healthy bones, cardiovascular function, and immune system function.

Detail Overview

Vitamins D and K2 work together to support healthy calcium metabolism and bone mineralization throughout the body as well as a healthy calcium balance in vascular tissues.† Recent studies have shown that vitamins D and K also support a healthy immune response.

Amount Per Capsule		% Daily Value
Serving Size 1 Capsule
Vitamin D₃ (as cholecalciferol)	125 mcg (5,000 IU)	625%
Vitamin K₂ (as menaquinone-7)(derived from sweet acacia tree)(Vachellia farnesiana)(flower extract)	100 mcg	83%

Other Ingredients:

Microcrystalline cellulose, vegetarian capsule (hydroxypropyl methylcellulose, water), ascorbyl palmitate, and silicon dioxide.

Suggested Use

Adults: 1 capsule daily with food or as directed by a healthcare professional. Children: As directed by a healthcare professional.

Allergy Statement

Made without common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat/gluten, soybeans, and sesame. No synthetic colors, flavors, or preservatives. Non-GMO.

Caution

Not intended for use by infants or children unless under the guidance of a physician. Consult with your physician if you are pregnant or lactating, or have any medical condition (including hypercalcemia), or taking prescription drugs (including blood thinning medications), or under the age of 18 years. It is recommended that individuals taking 100 mcg (4,000 IU) or more vitamin D per day have their vitamin D blood levels monitored. Do not exceed recommended serving size. KEEP OUT OF REACH OF CHILDREN.

Biogeek

Vitamin D3 + K2 60 сapsules Biogeek

~~$32.00~~ $27.20

Vitamin D3 + K2 60 сapsules Biogeek is a vitamin supplement featuring a bioavailable combination of vitamin D3 and vitamin K2 in capsule form. It is designed to support everyday wellbeing, healthy bones, cardiovascular function, and immune system function.

Vitamins D and K2 work together to support healthy calcium metabolism and bone mineralization, as well as a healthy calcium balance in vascular tissues. Together, these vitamins also support a healthy immune response.

Key Benefits

Supports everyday wellbeing
Provides a bioavailable combination of vitamin D3 and vitamin K2
Supports healthy bones and bone mineralization
Supports healthy calcium metabolism and calcium balance in vascular tissues
Supports cardiovascular function and a healthy immune response

Ingredient Breakdown

Ingredient or Feature	Role in the Formula
Vitamin D3 as cholecalciferol	Supports healthy calcium metabolism, bone mineralization, cardiovascular function, and immune system function.
Vitamin K2 as menaquinone-7, derived from sweet acacia tree flower extract	Works with vitamin D3 to support healthy calcium metabolism, bone mineralization, and calcium balance in vascular tissues.
Vegetarian capsule	Provides the capsule format and is made with hydroxypropyl methylcellulose and water.
Other ingredients	Microcrystalline cellulose, ascorbyl palmitate, and silicon dioxide.

How It Works

Vitamin D3 and vitamin K2 complement one another in supporting healthy calcium metabolism and bone mineralization. This combination also supports a healthy calcium balance in vascular tissues, cardiovascular function, and a healthy immune response.

Frequently Asked Questions

What is Biogeek Vitamin D3 + K2 60 designed to support?

It is designed to support everyday wellbeing, healthy bones, cardiovascular function, and immune system function.

Which vitamins are included?

The formula combines vitamin D3 as cholecalciferol with vitamin K2 as menaquinone-7.

How do vitamins D and K work together?

They work together to support healthy calcium metabolism, bone mineralization, and calcium balance in vascular tissues.

What are the other ingredients?

Other ingredients include microcrystalline cellulose, a vegetarian capsule made with hydroxypropyl methylcellulose and water, ascorbyl palmitate, and silicon dioxide.

Life Extension

Vitamins D and K with Sea-Iodine™ 60 capsules Life Extension

$18.00

Immune, bone, thyroid & arterial health, high potency

This formula delivers 125 mcg (5,000 IU) of vitamin D3, 2100 mcg of vitamin K and 1000 mcg of iodine in a convenient, once-daily supplement to support bone, brain, thyroid and vascular health.

What Is Vitamins D and K with Sea-Iodine?

Maintaining healthy vitamin D levels helps support cognitive health, promotes bone health, encourages healthy immune function and more. Vitamin K helps maintain your body’s calcium balance, which affects everything from cardiovascular health to bone density. Iodine is essential for the production of thyroid hormones.

Support your bone, brain, thyroid and arterial health with these three essential nutrients.

Vitamins D and K with Sea-Iodine™ Benefits

Supports healthy cognitive function
Promotes bone, immune & cardiovascular health
Helps inhibit calcium buildup in the arteries
Helps counteract possible iodine deficiency in healthy diets

Triple-Action Health Support

We’ve combined vitamin D3 with vitamin K and iodine for triple-action health support. Iodine is essential for the production of thyroid hormones. Vitamin K helps maintain your body’s calcium balance. Vitamin D supports cognitive health, healthy bone density, immune health and more. Get all of these vital nutrients in a convenient, once-daily supplement.

Why Should I Supplement With Vitamins D and K with Sea-Iodine™?

Customer: To me, there's nothing better than being outside on a really nice day. Whether I'm working in my garden or taking a walk with my family, we all love the outdoors. But during my last checkup, the doctor noticed that I wasn't getting enough vitamin D.

Michael A. Smith, MD: From your brain to your heart, your bones to your immune system, vitamin D affects nearly every cell in your body and is critical for optimal health. Even if you spend a lot of time outdoors, your body may not be producing enough of this important vitamin. In fact, studies show that people are really low in vitamin D—and that's why doctors are recommending it to their patients more than ever.

Customer: So, my body needs more vitamin D, but there are all these different doses and options. How can I decide which is best for me?

Michael A. Smith, MD: Like all of our products, Life Extension’s Vitamin D3 is made with the highest quality standards. We recommend taking 5,000 international units a day, but we offer doses ranging from 1,000 to 7,000 units depending on your vitamin D blood level. Be sure to check with your doctor to see which one is right for you. We also offer Vitamins D and K with Sea-Iodine™ for a complete vitamin D formulation.

Customer: Three weeks in, and vitamin D has really made an impact on my whole life. I have more energy and overall, I feel for lack of a better word…sunnier.

Your skin produces vitamin D when in direct sunlight, but you should not get your vitamin D from unprotected sun exposure or indoor tanning devices because of the potential effects on skin health.

Iodine is a trace element essential for the production of thyroid hormones, and vitamin K is an essential nutrient that promotes both arterial and bone health.

Iodine is essential for thyroid health

Iodine is a trace element necessary for the production of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). Iodine is abundant in seafood and sea vegetables, but not everyone likes or has access to marine foods, and vegan diets sometimes lack adequate iodine.

Commercial salt makers add iodine to table salt to make up for this potential deficiency. However, we now know the health risks of eating too much salt, so health-conscious people may miss out on an easy source of iodine. Vitamins D and K with Sea-Iodine™ delivers 1,000 mcg of iodine to support healthy iodine levels.

Vitamin K1 and two different types of K2

Vitamin K helps inhibit calcium buildup in your arteries while promoting healthy calcium absorption into your bone matrix. K1 is the most common form of vitamin K in the diet, coming primarily from leafy green vegetables—though vitamin K1 isn’t well absorbed from these foods.

Vitamin K2 is found in cheese, eggs and fermented soybeans. It has been shown to be more bioavailable than K1 and to remain active in the body far longer. The MK-4 and MK-7 forms of vitamin K2 also provide important benefits but have different tissue distributions and bioavailability, so it’s important to take both. This formula contains both forms of vitamin K2.

Vitamin D3 for cognitive, bone and immune health

Healthy serum vitamin D levels have been shown to correspond with better cognitive function. Vitamin D, along with vitamin K and essential minerals, is necessary for facilitating the transport of calcium into the bone matrix for strong, healthy bones and teeth. Vitamin D also plays a critical role in healthy immune function.

Some people may need 125 mcg (5,000 IU) to 200 mcg (8,000 IU) of vitamin D3 a day to achieve healthy blood levels of vitamin D. If your multivitamin already delivers 25-75 mcg (1,000–3,000 IU) of vitamin D, adding Vitamins D and K with Sea-Iodine™ may help achieve healthy vitamin D levels.

Vitamin D3 for heart health and blood pressure support

Vitamin D promotes a healthy inflammatory response, supports cardiovascular health and encourages healthy endothelial function. Vitamin D also helps inhibit excess renin levels. Healthy renin levels help maintain healthy blood pressure already within the normal range.

Getting enough vitamins D and K and iodine

This vitamin D3 supplement delivers 125 mcg (5,000 IU) of vitamin D3 as cholecalciferol per capsule. We suggest that you take a 25-hydroxy vitamin D blood test after 3 months to assess and adjust your dosage. Your optimal blood levels should be 50–80 ng/ml year-round.

Ensure you get enough of these three essential nutrients with Vitamins D and K with Sea-Iodine™.

Serving Size 1 capsule
Amount Per Serving
Vitamin D3 (as cholecalciferol)	125 mcg
Vitamin K activity from:	2100 mcg
Vitamin K1 (as phytonadione)	1000 mcg
Vitamin K2 (as menaquinone-4)	1000 mcg
Vitamin K2 (as trans menaquinone-7)	100 mcg
Iodine [from Sea-Iodine™ Complex Blend (organic kelp and bladderwrack extracts, potassium iodide)]	1000 mcg
Other ingredients: microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, food starch-modified, dicalcium phosphate, stearic acid, silica.

Non-GMO

Dosage and Use

Take one (1) capsule once daily with food, or as recomended by a healthcare practitioner.

Caution

Individuals consuming more than 50 mcg (2,000 IU)/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Do not exceed 250 mcg per day unless recommended by your doctor. Vitamin D supplementation is not recommended for individuals with high blood calcium levels. If you have a thyroid condition or are taking antithyroid medications, do not use without consulting your healthcare practitioner. If you are taking a vitamin K antagonist (e.g. warfarin), consult your healthcare practitioner before taking this product.

Warnings

KEEP OUT OF REACH OF CHILDREN
DO NOT EXCEED RECOMMENDED DOSE
Do not purchase if outer seal is broken or damaged.
When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

Integrative Therapeutics

K2 + D3 60 capsules Integrative Therapeutics

$28.00

K2 + D3 60 capsules from Integrative Therapeutics provide cardiovascular and bone support with vitamin K2 from clinically studied MenaQ7® and high-potency vitamin D3. The available package contains 60 capsules.

Vitamin K2 and vitamin D3 complement one another to help the body absorb and use calcium for healthy bone support. Vitamin K2 supports healthy calcium handling and calcium deposition in bones.

Key Benefits

Supports cardiovascular and bone health
Provides vitamin K2 from MenaQ7®
Includes high-potency vitamin D3
Helps the body absorb and use calcium for healthy bone support

Ingredient Breakdown

Ingredient or Feature	Role in the Formula
Vitamin D3	Supports the body’s absorption and use of calcium for healthy bone support.
Vitamin K2 from MenaQ7® Vitamin K2	Supports healthy calcium handling and calcium deposition in bones.

How It Works

Vitamin D3 and vitamin K2 are designed to complement one another. Vitamin D3 helps the body absorb and use calcium, while vitamin K2 supports calcium transport away from blood vessels and healthy calcium deposition in bones.

Suggested Use

Adults take 1 capsule daily with a meal. Do not exceed recommended dose.

Caution

Do not take if you are pregnant or nursing. If you have a kidney disorder, hypercalcemia, hypercalciuria, blood clotting issue, or if you are taking any medications, including blood thinners, consult a healthcare professional before use. Do not take with other Vitamin D containing supplements. Keep out of reach of children. Safety sealed with inner seal. Do not use if seal is broken or missing.

Quality & Dietary Information

Free from wheat, gluten, soy, dairy, colors, and artificial flavors.

Frequently Asked Questions

What is K2 + D3 designed to support?

It is designed to support cardiovascular and bone health.

Which vitamins does this formula provide?

It provides vitamin D3 as cholecalciferol and vitamin K2 from MenaQ7® Vitamin K2.

How should adults take this product?

Adults take 1 capsule daily with a meal.

What ingredients are used in the capsule?

Other ingredients include cellulose, a plant-derived capsule made with hypromellose, calcium laurate, and silica.

What is this product free from?

This product is free from wheat, gluten, soy, dairy, colors, and artificial flavors.

Storage

Keep tightly closed. Store at room temperature. Avoid excessive heat and direct sunlight.

Dr. Mercola

Vitamins D3 & K2 5,000 IU 180 mcg Capsules Dr.Mercola

~~$37.49~~ $29.97

Trace Minerals Research

Vitamin D3 + K2 60 gummies Trace Minerals Research

$21.99

Vitamin D3 + K2 Gummies – Bone, Heart & Immune Support

Bone Health • Immunity • Heart Support • Cellular Function

Vitamin D3 + K2 Gummies by Trace Minerals Research combine two essential nutrients that work synergistically to support strong bones, a healthy heart, and a robust immune system. Each gummy provides highly bioavailable Vitamin D3 (cholecalciferol) and Vitamin K2 (MK-7), enhanced with ConcenTrace® Trace Minerals for full-spectrum mineral support. Delicious natural strawberry flavor makes it easy for adults and children alike to take daily.

Key Benefits

Supports calcium absorption and bone strength
Promotes heart and vascular health by helping regulate calcium use
Supports immune system and cellular protection
Synergistic action of D3 and K2 enhances bioavailability
Delicious natural strawberry flavor – perfect for both adults and kids

What Makes It Unique

Highly bioavailable forms of Vitamin D3 and K2 (MK-7)
Enriched with ConcenTrace® Trace Minerals for better nutrient utilization
Natural flavors and colors only – no artificial dyes or sweeteners
Convenient gummy form – ideal for the whole family

Supplement Facts

Serving Size	1 Gummy
Servings Per Container	60
Calories	10
Total Carbohydrates	3 g
Sugar Alcohol	3 g
Vitamin D3 (as Cholecalciferol)	125 mcg (5,000 IU) – 625%
Sodium (as Sodium Citrate)	5 mg
ConcenTrace® Trace Minerals	5 mg **
Vitamin K2 (as Menaquinone-7, MK-7)	50 mcg **

*Percent Daily Values are based on a 2,000 calorie diet.
**Daily Value not established.

Other Ingredients: Maltitol, distilled water, isomalt, pectin, non-GMO citric acid, carnauba wax, natural flavors, MCT coconut oil, black carrot (Daucus carota) extract (color).

Suggested Use

For best results, chew 1 gummy up to 3 times daily with food to enhance absorption and support digestion.

Allergens

No known allergens. Non-GMO • Gluten-Free • Vegan-Friendly.

Frequently Asked Questions

Why combine Vitamin D3 and K2?

Vitamin D3 enhances calcium absorption, while Vitamin K2 directs calcium to bones and teeth rather than arteries. Together, they form a synergistic duo for bone and heart health.

What are the main benefits of D3 + K2 gummies?

They help maintain strong bones, promote cardiovascular health, and strengthen the immune system with a delicious strawberry taste.

Are D3 + K2 gummies safe for children?

Yes, they are suitable for children. The natural gummy form makes them easy to take daily. Always consult a pediatrician for proper dosage.

Do you use artificial flavors or dyes?

No, we use only natural colors and flavors — never synthetic dyes or additives.

Can I take D3 + K2 with other supplements?

Yes, it can be combined with other supplements. Consult your healthcare provider for personalized recommendations.

Where can I buy Vitamin D3 + K2 gummies?

Available at health food stores, pharmacies, and online retailers carrying Trace Minerals Research products.

Storage & Quality

Store in a cool, dry place away from sunlight. Manufactured by Trace Minerals Research in a cGMP-certified facility and third-party tested for purity and potency.

Life Extension

Low-Dose Vitamin K2 Menaquinone-7 (MK-7) 45 mcg 90 softgels Life Extension

$13.50

Low-Dose Vitamin K2 contains the menaquinone-7 (MK7) form of vitamin K2, which metabolizes slowly. This makes MK7 more available to provide a more consistent supply of vitamin K to the body.

What Is Low Dose Vitamin K2?

Vitamin K is essential for heart health because it helps facilitate the transport of calcium out of the bloodstream. This is done via calcium-regulating proteins in the arteries, which require vitamin K to work.

Research shows that high intakes of vitamin K2 correspond with better arterial health.

Low Dose Vitamin K2 Benefits

Supports cardiovascular health
Vitamin K2 remains biologically active in the body longer than other K forms
Excellent alternative to diet-based K2 sources such as milk, eggs, cheese and fish

Limits to Dietary Vitamin K Intake

Studies show it’s difficult to rely on diet alone to supply all forms of vitamin K. For instance, vitamin K2 in its highest concentrations are often found in foods high in saturated fat. You would have to consume large amounts of cheese to get the optimal K2 levels that are supported by human clinical trials. And low-fat versions of these foods often have much less vitamin K2 content.

Vitamin K is required by matrix Gla-protein (MGP) and other calcium-regulating proteins in your arteries. MGP needs vitamin K to function properly. Without sufficient vitamin K, inactive MGP can build up in your arteries, allowing calcium to bind to the arterial wall.

Long-lasting vitamin K2 menaquinones

Vitamin K2 (a group of related compounds called menaquinones) is found in meat, eggs and dairy products. K2 is also made to some extent by bacteria in the human gut, which provides a certain amount of your vitamin K requirement.Still, vitamin K supplementation is a good idea, and K2 is an ideal choice.

Vitamin K in clinical studies

Human studies show that vitamin K2 is up to 10 times more bioavailable than K1. Plus, vitamin K2 remains biologically active in the body far longer than K1. For instance, your liver filters vitamin K1 out of your system within eight hours. But measurable levels of K2 (MK-7) have been detected 72 hours later.

The Rotterdam Heart Study, a large-scale, well-controlled clinical trial that tracked 4,800 participants for seven years, revealed that participants who ingested the greatest quantities of vitamin K2 in their diet experienced better cardiovascular health than people who ingested the least. High intakes of vitamin K2 also corresponded with lower levels of calcium accumulation in the aorta.

Other studies support K2’s role in promoting arterial health—a clinical trial in postmenopausal women showed that MK-7 supported a 50 percent improvement in inactive MGP levels and improved arterial flexibility.

Serving Size 1 softgel
Amount Per Serving
Vitamin K2 (as trans menaquinone-7)	45 mcg
Other ingredients: medium chain triglycerides, gelatin, glycerin, purified water, carob color.

Non-GMO

Dosage and Use

Take one (1) softgel daily with food, or as recommended by a healthcare practitioner.

Caution

If you are taking a vitamin K antagonist (e.g. warfarin), consult your healthcare practitioner before taking this product.

Warnings

KEEP OUT OF REACH OF CHILDREN
DO NOT EXCEED RECOMMENDED DOSE
Do not purchase if outer seal is broken or damaged.
When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

Microbiome Labs

MegaQuinone K2-7 60 capsules Microbiome Labs

$52.63

MegaQuinone™ – Advanced K2 + Mineral Complex for Bone, Nerve & Cardiovascular Support, 60 Capsules

Microbiome Labs

High-Concentration MK-7 Formula with Chelated Minerals and K1

MegaQuinone™ is a clinically developed vitamin K2 (MK-7) complex designed to support calcium metabolism, bone mineralization, vascular health, and mitochondrial energy production. Unlike standard K2 supplements, MegaQuinone™ features a full-spectrum approach: high-dose natural K2-7, plus vitamin K1, and chelated magnesium and zinc — all carefully selected to maximize absorption and efficacy.

This is the original K2 product from Microbiome Labs and one of the most comprehensive K2 formulas available — ideal for use alongside D3 or in standalone metabolic protocols.

Key Benefits

Supports healthy bone mineral density and calcium utilization
Helps redirect calcium away from arteries and into bones
Supports mitochondrial function, energy (ATP) production, and cardiovascular output
Includes vitamin K1 to complement K2’s effects on clotting and bone remodeling
Chelated minerals (magnesium & zinc) enhance K2-dependent enzyme activity
May reduce risk of muscle cramps and improve nerve-muscle function
Highly bioavailable MenaquinGold® K2-7 (98% trans isomer) from chickpea fermentation
Soy-free, solvent-free, stable at room temperature
NSF Certified for Sport®

Why MegaQuinone™ is Different

Most K2 supplements:

Use synthetic or soy-derived MK-7
Provide K2 alone without co-factors
Lack purity (contain cis isomers or impurities)
Provide minimal dosing

MegaQuinone™ addresses all of these:

Uses MenaquinGold®: natural, fermented, 98% trans-isomer MK-7 from chickpeas
Includes vitamin K1 (phytonadione) for coagulation and vascular synergy
Chelated magnesium (glycinate) and zinc (bisglycinate) improve enzyme activation and absorption
160 mcg of MK-7 per capsule — higher than most brands

Supplement Facts

Serving Size: 1 capsule
Servings Per Container: 60

Ingredient	Amount per Serving	% Daily Value
Vitamin K2 (as MK-7, MenaquinGold®)	160 mcg	*
Vitamin K1 (as Phytonadione)	100 mcg	*
Magnesium (as magnesium glycinate)	36 mg	9%
Zinc (as zinc bisglycinate)	15 mg	136%

Other Ingredients: Cellulose, vegetable capsule (cellulose and water).
Contains no soy, gluten, GMOs, or artificial additives.

Suggested Use

Adults (18+):
Take 1 capsule daily with a meal, or as directed by your healthcare practitioner.

Frequently Asked Questions (FAQ)

Q: How is MegaQuinone™ different from MegaQuin™ K2+D3?
A: MegaQuinone™ contains no vitamin D3, but includes vitamin K1 and chelated minerals (magnesium, zinc), making it ideal for custom D3 stacking protocols or for those already supplementing D3 separately.

Q: Can I combine this with vitamin D3?
A: Yes — MegaQuinone™ is often paired with high-dose D3 for optimal calcium channeling and bone remodeling support.

Q: Why is vitamin K1 included?
A: While K2 regulates calcium distribution, K1 supports blood clotting and complements K2 in maintaining healthy bone and vascular function.

Q: Is it safe for athletes?
A: Yes — it is NSF Certified for Sport®, meaning it's free from banned substances and contaminants.

Q: Who should avoid this product?
A: Those taking anticoagulants (e.g. warfarin) should consult a physician before supplementing with any form of vitamin K.