Vitamin K2 100 mcg
Nutricost
Vitamin K2 100 mcg
4.8
★ ★ ★ ★ ★
(1066 ratings)
Vitamin K 100 mcg
Score 60.0
An extremely affordable Vitamin K2 (MK-4) supplement, but its low MK-4 dosage and absence of Vitamin D3 reduce its effectiveness for comprehensive bone and cardiovascular health support.
Quantity: 240 Capsule(s)Servings size: 1 Capsule(s) (240 servings)
Selected goals:
Other goals:
Bone Health
Heart Health
Cardiovascular Support
General Health
leaderboard Score 60.0
An extremely affordable Vitamin K2 (MK-4) supplement, but its low MK-4 dosage and absence of Vitamin D3 reduce its effectiveness for comprehensive bone and cardiovascular health support.
insights Analysis
Nutricost Vitamin K2 100 mcg provides Menaquinone-4 (MK-4) at an exceptionally low price per serving, making it highly accessible. However, similar to the NOW K-2 product with MK-4, this form of Vitamin K2 is typically effective for systemic health benefits at much higher, milligram-level dosages. At 100 mcg, its impact on bone density and arterial health is likely limited according to nutritionist recommendations. The large quantity (240 servings) offers good value if one wishes to consume MK-4, but it misses the critical synergistic component of Vitamin D3, which is vital for optimal calcium regulation and the full benefits of K2 for bone and cardiovascular health. Online reviews often praise its affordability.
- Very cost-effective with a low price per serving and a large quantity.
- Provides Vitamin K2 (MK-4) for those specifically seeking this form.
- The 100 mcg dose of MK-4 is considered low for achieving significant systemic bone and cardiovascular benefits.
- Lacks Vitamin D3, a crucial synergistic partner for K2 in calcium metabolism.
- Less potent and comprehensive compared to MK-7 forms or D3+K2 combinations.
$14.95($0.06 per serving)
 iHerb | $ 14.95 | |
 Walmart | $ 14.95 | |
 Vitacost | $ 14.99 |
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 | 100 mcg |
Categories
Vitamin K 70.0
It offers an economical source of Vitamin K2 as MK-4 in high quantity, making it a good choice for those who prioritize value for this specific K2 form.
Goals
Bone Health 60.0
While MK-4 has a role in bone, the 100 mcg dose is generally insufficient for significant impact, and the absence of Vitamin D impedes optimal calcium integration into bones.
Heart Health 60.0
The low dose of MK-4 offers limited direct benefit for preventing arterial calcification, a key mechanism of K2 in supporting heart health.
Its contribution to cardiovascular support is minimal due to the suboptimal MK-4 dosage for broad effects and the lack of essential synergistic nutrients like Vitamin D.
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