Vitamin K-2 Menaquinone-7 50 mcg
Solaray
Vitamin K-2 Menaquinone-7 50 mcg
4.8
★ ★ ★ ★ ★
(280 ratings)
Vitamin K 50 mcg
Score 50.0
A simple Vitamin K2 (MK-7) supplement, but with a low adult dosage and missing synergistic Vitamin D3, limiting its effectiveness for comprehensive bone and heart health goals.
Quantity: 60 VegCap(s)Servings size: 1 Veg Cap(s) (60 servings)
Selected goals:
Other goals:
Bone Health
Heart Health
Cardiovascular Support
General Health
leaderboard Score 50.0
A simple Vitamin K2 (MK-7) supplement, but with a low adult dosage and missing synergistic Vitamin D3, limiting its effectiveness for comprehensive bone and heart health goals.
insights Analysis
Solaray Vitamin K-2 Menaquinone-7 50 mcg delivers Vitamin K2 in its preferred MK-7 form, derived from chickpea, indicating a natural source. While MK-7 is praised by nutritionists for its longer half-life and superior systemic activity compared to MK-4, the 50 mcg dosage is on the lower side for adult therapeutic or even optimal maintenance doses, which typically start from 90 mcg upwards. For maximal benefit in bone and cardiovascular health, Vitamin K2 works synergistically with Vitamin D, which is absent in this formulation. The product is a basic, single-ingredient K2 supplement, and its moderate price per serving doesn't quite justify the lower dosage given the availability of higher-dosed alternatives.
- Contains Menaquinone-7 (MK-7), the most preferred form of Vitamin K2 for systemic benefits.
- Derived from a natural source (chickpea).
- The 50 mcg dosage of MK-7 is relatively low for achieving significant bone and cardiovascular health benefits in adults.
- Does not include Vitamin D3, which is essential for optimal K2 synergy in calcium metabolism.
- Less potent and comprehensive compared to higher-dosed MK-7 products or D3+K2 combinations.
$18.79($0.31 per serving)
 iHerb | $ 18.79 | |
 Vitacost | $ 18.79 |
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 K | 50 mcg |
Categories
Vitamin K 60.0
It features the desirable MK-7 form of Vitamin K2, but the 50 mcg dose places it at the lower end in terms of potency within the Vitamin K supplement category.
Goals
Bone Health 50.0
While MK-7 supports bone health, the 50 mcg dosage is insufficient for robust adult benefits, and the absence of Vitamin D limits its capacity to properly utilize calcium for bone density.
Heart Health 50.0
The low MK-7 dose provides only a foundational contribution to heart health and arterial calcification prevention, falling short of more impactful dosages or combined formulas.
Its ability to offer comprehensive cardiovascular support is hampered by the conservative MK-7 dose and the lack of essential co-factors like Vitamin D.
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