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Vitamin K-1 100 mcg

Swanson Premium Brand
4.7
★ ★ ★ ★ ★
(542 ratings)
Vitamin K 100 mcg
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Score87

An affordable Vitamin K1 supplement that supports general health and healthy blood clotting.

How scoring works
Quantity:100 Tablet(s) • (100 servings)
Goals:
General Health

Score 87

An affordable Vitamin K1 supplement that supports general health and healthy blood clotting.

How scoring works
$7.49($0.07 per serving)
iHerb
$ 10.99
iHerb
$ 10.99
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Analysis

This product provides 100 mcg of Vitamin K1, also known as phylloquinone, which is the form of K found in leafy greens. It is an essential nutrient for daily wellness and supports healthy blood function. This simple tablet is an affordable way to make sure you get enough of this basic vitamin.

However, this form does not stay in the body as long as K2 and is not as focused on cardiovascular support. It is a solid pick for basic nutritional insurance but might not meet more intensive structural needs. It works best as part of a general multivitamin routine.

Pros

  • Very affordable price
  • Supports general wellness
  • Simple tablet form
  • Good for basic nutritional gaps
  • High serving count

Cons

  • K1 is not as effective for bone/heart goals as K2
  • Lower bioavailability than K2 forms
  • Lacks synergistic nutrients

Warnings

  • Strictly avoid if taking blood thinners like warfarin
  • Check with a doctor before use if you have clotting issues
  • Best taken with a meal

Nutrient quality

63 Moderate impact

Vitamin K1 is the primary form for coagulation but offers limited utility for the specific goals of bone and heart health. Tablet delivery lacks a lipid base, which may further impede the absorption of this fat-soluble nutrient.

Ingredient transparency

95 Highest impact

Active ingredient amount is clearly stated, though the specific molecular form is not as prominently detailed as in premium formulas. Basic usage and serving information are easy to locate and understand.

Customer satisfaction

92 Highest impact

Very high review count and strong average rating reflect a high degree of trust and reliability for this basic supplement. User feedback confirms that the product meets expectations for a budget-friendly Vitamin K source.

Value for money

99 Highest impact

Exceptional affordability makes this one of the most cost-effective ways to ensure basic Vitamin K intake. The extremely low price per serving justifies the simpler molecular form and delivery system.

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Goals

Impact
High effect
B+ Goal FitB Strength of SupportC CoverageA+ Formula Quality

Vitamin K1 supports foundational health through its essential role in blood coagulation and cardiovascular pathways. This nutrient is a core vitamin required for maintaining systemic resilience and daily physiological function.

Providing a consistent 100 mcg dose appears well-aligned with filling nutritional gaps related to basic vitamin status. This straightforward single-nutrient approach meaningfully contributes to long-term health maintenance without unnecessary additives.

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Impact
Lower effect
F Goal FitC- Strength of SupportF CoverageC Formula Quality

Phylloquinone provides a single-nutrient approach to vitamin K supply, which is required for the activation of various proteins in the body. While vitamin K is generally associated with bone health, the K1 form is primarily utilized by the liver for blood coagulation rather than by the skeletal tissue.

This product lacks the foundational structural minerals and transport signaling cofactors needed for a complete bone health strategy. As a standalone supplement, it does not provide the specific isomers or synergistic nutrients typically required to meaningfully improve bone mineral density.

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Impact
Lower effect
F Goal FitC- Strength of SupportF CoverageC Formula Quality

Vitamin K1 plays a primary role in healthy blood coagulation but does not significantly impact the pathways related to arterial calcification. For cardiovascular goals, Vitamin K2 is the more relevant form for maintaining vessel flexibility.

While this supplement provides a standard dose of K1, it lacks the specialized cardiovascular mechanisms associated with the MK-7 subtype. Individuals seeking to support heart and arterial health may find more targeted support in Vitamin K2 formulations.

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Impact
Situational effect
F Goal FitF Strength of SupportF CoverageD+ Formula Quality

Swanson Premium Vitamin K-1 is a focused supplement for blood coagulation health. It lacks the Vitamin K2 subtypes necessary for cardiovascular flexibility and bone health, which are key priorities in an anti-aging context.

The single-ingredient focus is clear but misses the primary longevity pathways associated with Vitamin K. It offers minimal utility for mitigating the physiological processes of aging compared to MK-7 alternatives.

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Impact
Situational effect
F Goal FitF Strength of SupportF CoverageB- Formula Quality

This supplement provides 100mcg of Vitamin K1 per tablet. While Vitamin K1 is essential for normal blood clotting, it is not the preferred form for supporting heart health or preventing arterial calcification.

The cardiovascular benefits of Vitamin K1 are significantly lower than those of the K2 subtype. This product appears better aligned for general wellness and coagulation support rather than targeted cardiovascular maintenance.

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Ingredients

IngredientAmount per serving
Vitamin K-1
100 mcg
Adults 18–50
Report overview
Vitamin K · 100 mcg OverallScore13
F Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyF Value
This supplement provides Vitamin K1, which is essential for healthy blood clotting but is not the preferred form for bone or heart health. It is an extremely cheap option but lacks the more bioavailable Vitamin K2 subtypes.
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