Vitamin K-1 100 mcg
Swanson Premium Brand
Vitamin K-1 100 mcg
4.7
★ ★ ★ ★ ★
(459 ratings)
Vitamin K 100 mcg
Score 65.0
This product offers a basic Vitamin K1 supplement at an affordable price, primarily supporting blood clotting and general health, but lacks the more comprehensive bone and cardiovascular benefits of Vitamin K2.
Quantity: 100 Tablet(s)Servings size: 1 Tablet(s) (100 servings)
Selected goals:
Other goals:
Bone Health
Heart Health
Cardiovascular Support
General Health
leaderboard Score 65.0
This product offers a basic Vitamin K1 supplement at an affordable price, primarily supporting blood clotting and general health, but lacks the more comprehensive bone and cardiovascular benefits of Vitamin K2.
insights Analysis
This product provides a standard daily dose of Vitamin K1 (Phylloquinone). While K1 is crucial for blood clotting and contributes to bone health, modern nutritional understanding, and a plethora of online reviews and nutritionist recommendations suggest that Vitamin K2 (Menaquinone), particularly MK-7, is more effective for directing calcium to bones and away from arteries, thus offering superior support for cardiovascular and comprehensive bone health. This product solely contains K1, which limits its efficacy for these broader goals compared to K2 or K1/K2 combinations, positioning it as a foundational but not optimal choice for targeted bone and heart health.
- Provides an essential nutrient (Vitamin K1).
- Very affordable price per serving.
- Standard and easily absorbed dosage for K1.
- Contains only Vitamin K1, which is less effective than Vitamin K2 for optimal bone and cardiovascular health benefits.
- Doesn't offer the broader benefits found in K1/K2 blends or multi-nutrient bone support formulas.
- Individuals on anticoagulant medications (like Warfarin) should consult a healthcare professional before taking Vitamin K supplements, as K1 can interfere with these medications.
$6.59($0.06 per serving)
 iHerb | $ 6.59 |
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-1 | 100 mcg |
Categories
Vitamin K 65.0
As a Vitamin K supplement, it provides an essential form (K1) at a standard dose and excellent value. However, within the broader Vitamin K category, it doesn't include Vitamin K2, which is widely considered by nutritionists and online communities to be more beneficial for targeted bone and cardiovascular health.
Goals
General Health 70.0
As an essential vitamin, 100mcg of Vitamin K1 contributes to general health by ensuring proper blood clotting function and supporting some bone health processes. It meets the daily requirement for K, but it's a single nutrient focus and less comprehensive than a multi or a K2 supplement for broader general health benefits.
Bone Health 60.0
Vitamin K1 plays a role in bone mineralization by supporting osteocalcin carboxylation. However, K2 (especially MK-7) is generally considered more effective by nutritionists for actively promoting calcium integration into bone matrix and reducing arterial calcification.
Heart Health 55.0
Vitamin K1 contributes to healthy blood clotting, which is essential for cardiovascular function. However, for directly preventing arterial calcification, which is a key aspect of heart health, Vitamin K2 is widely recognized as having a more direct and significant impact by experts.
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