Vitamin K2
Dr. Mercola
Vitamin K2
4.8
★ ★ ★ ★ ★
(313 ratings)
Vitamin K 180 mcg
Score 80.0
A high-quality 180mcg MK-7 Vitamin K2 supplement from a trusted brand, effective for bone and heart health, offering good value within its premium category.
Quantity: 30 Capsule(s)Servings size: 1 Capsule(s) (30 servings)
Selected goals:
Other goals:
Bone Health
Heart Health
Cardiovascular Support
General Health
leaderboard Score 80.0
A high-quality 180mcg MK-7 Vitamin K2 supplement from a trusted brand, effective for bone and heart health, offering good value within its premium category.
insights Analysis
Dr. Mercola's Vitamin K2 provides 180mcg of Menaquinone-7 (MK-7), widely recognized as the most effective form of K2 for systemic benefits, particularly bone mineralization and arterial flexibility. The dosage is within the range recommended by many health professionals for daily maintenance. Dr. Mercola's brand generally signifies a commitment to quality ingredients, which is a plus. The price per serving is competitive within the premium K2 market, making it a reliable option, though not the absolute cheapest. Online reviews generally reflect satisfaction with Dr. Mercola's products, suggesting trust in the brand's efficacy.
- Contains the highly effective Menaquinone-7 (MK-7) form of Vitamin K2.
- Provides a clinically relevant 180mcg dosage.
- From Dr. Mercola, a brand recognized for quality and often non-GMO/clean ingredients.
- Slightly better price per serving than some comparable premium brands.
- Still relatively more expensive per serving compared to some potent, high-value MK-7 alternatives.
- Single ingredient supplement, requiring other nutrients like Vitamin D to be sourced separately for synergistic benefits.
$27.99($0.93 per serving)
 Pure Formulas | $ 27.99 | |
 iHerb | $ 30.79 | |
 Vitacost | $ 34.99 |
bolt Effectiveness for goals
Vitamin K is essential for proper blood clotting and plays a significant role in bone metabolism. It helps the body produce proteins necessary for these vital bodily functions.
Vitamin K activates proteins such as osteocalcin, which are crucial for incorporating calcium into the bone matrix. This mechanism supports bone mineralization and helps maintain bone density.
Vitamin K1 (phylloquinone) is primarily effective for blood coagulation and is abundant in green leafy vegetables. Vitamin K2 (menaquinones) is more involved in bone and cardiovascular health, found in fermented foods and animal products, and has different bioavailabilities.
Emerging research suggests that Vitamin K, particularly K2, may help prevent arterial calcification by activating matrix Gla protein. This protein helps inhibit calcium deposition in soft tissues, supporting arterial flexibility.
Vitamin K works synergistically with calcium by helping to direct calcium to the bones and away from soft tissues like arteries. It activates proteins like osteocalcin for bone binding and matrix Gla protein to inhibit soft tissue calcification.
schedule Dosage, timing & forms
Recommended dosages for Vitamin K vary by age and form (K1 vs K2). For adults, the Adequate Intake (AI) for Vitamin K is 120 mcg per day for men and 90 mcg per day for women. Specific supplemental dosages may differ depending on individual needs and health goals.
Yes, dosages can differ between Vitamin K1 and K2 due to their varying potencies and half-lives. While K1 is measured in micrograms (mcg) for general intake, K2 (especially MK-7) may be effective at lower microgram doses due to its longer half-life. It's important to check the specific form and dosage on the supplement label.
Yes, Vitamin K is a fat-soluble vitamin, meaning it is best absorbed when taken with a meal containing some dietary fat. This helps facilitate its absorption into the body.
The two main forms of Vitamin K found in supplements are Vitamin K1 (phylloquinone) and Vitamin K2 (menaquinone). Vitamin K2 further has various subtypes, with MK-4 and MK-7 being the most common in supplements. Each form may have distinct roles and bioavailability.
There is no established Upper Limit (UL) for Vitamin K from food or supplements, as toxicity is rare. However, high doses of synthetic Vitamin K (menadione, K3) can be toxic, though this form is not typically found in supplements. Always adhere to recommended dosages and consult a healthcare provider if you have concerns.
health_and_safety Safety & interactions
Vitamin K plays a crucial role in blood clotting, which is the opposite effect of anticoagulant medications such as warfarin. Consuming inconsistent amounts of Vitamin K can alter warfarin's effectiveness, potentially making the blood thinner less effective or increasing bleeding risk. Individuals taking warfarin should maintain a consistent intake of Vitamin K and consult their healthcare provider.
Individuals taking anticoagulant medications like warfarin should consult their doctor before taking Vitamin K supplements due to potential interactions. People with certain liver conditions or those with a G6PD deficiency should also seek medical advice before supplementation. Always discuss new supplements with a healthcare provider.
Vitamin K supplements are generally considered safe for most healthy individuals when taken at recommended dosages. Side effects are uncommon but can include upset stomach, diarrhea, or allergic reactions in sensitive individuals. High doses of synthetic Vitamin K (menadione, K3) can be toxic, but this form is rarely used in supplements.
Vitamin K is essential during pregnancy and breastfeeding, and adequate intake is important for both mother and child. However, supplementation during these periods should only be undertaken under the guidance of a healthcare professional. High doses are generally not recommended without specific medical advice.
There is currently no established Tolerable Upper Intake Level (UL) for Vitamin K from food or supplements due to its low potential for toxicity. However, excessive intake, especially of synthetic forms, could potentially have adverse effects. It is always best to adhere to recommended dosages on supplement labels or as advised by a healthcare professional.
Ingredients
| Ingredient | Amount per serving |
|---|---|
Vitamin K2 | 180 mcg |
Categories
Vitamin K 85.0
As a dedicated Vitamin K2 (MK-7) supplement at an effective dose, it serves its purpose exceptionally well within the Vitamin K category for those specifically seeking the systemic benefits of this form.
Goals
Bone Health 88.0
The 180mcg of MK-7 is highly effective in activating proteins that direct calcium to bones, crucial for maintaining bone density and preventing osteoporosis, aligning with expert recommendations.
Heart Health 88.0
With 180mcg of MK-7, this supplement actively supports heart health by helping to prevent arterial calcification, ensuring arteries remain flexible and reducing cardiovascular strain.
The optimal dose of MK-7 directly aids in regulating calcium metabolism, which is vital for preventing plaque buildup in arteries and maintaining overall cardiovascular system integrity.
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