Vitamin K-2 100 mcg
NOW
Vitamin K-2 100 mcg
4.8
★ ★ ★ ★ ★
(13261 ratings)
Vitamin K 100 mcg
Score 88
A cost-effective and well-regarded Vitamin K2 (MK-4) supplement, highly effective for bone and cardiovascular health, offering great value despite MK-4's shorter half-life.
Quantity: 250 Capsule(s) • (250 servings)
Goals: flag Heart Health flag Joint Health flag Cardiovascular Support flag General Health flag Bone Health
leaderboard Score 88
A cost-effective and well-regarded Vitamin K2 (MK-4) supplement, highly effective for bone and cardiovascular health, offering great value despite MK-4's shorter half-life.
insights Analysis
NOW's Vitamin K-2 100 mcg (MK-4) is a highly regarded supplement. MK-4 is an effective form of K2, known for its role in bone metabolism and arterial health by directing calcium. While it requires a higher dose or more frequent intake compared to MK-7 due to its shorter half-life, the generous 250-serving count makes it incredibly cost-effective. The sheer volume of positive reviews online (over 12,000) underscores its popularity and perceived efficacy among consumers. Nutritionists acknowledge MK-4's benefits, though often recommend MK-7 for its convenience due to longer systemic presence.
- Excellent price per serving for a Vitamin K2 supplement.
- Contains Menaquinone-4 (MK-4), an effective form of K2 for bone and cardiovascular health.
- High number of servings provides long-term supply.
- Extremely high review count indicates broad customer satisfaction.
- Menaquinone-4 (MK-4) has a shorter half-life compared to Menaquinone-7 (MK-7), potentially requiring more frequent dosing for sustained levels.
- Does not include other synergistic vitamins like D3, which are often recommended alongside K2 for optimal calcium utilization.
$18.59($0.07 per serving)
 Vitacost | $ 18.59 | |
 Walmart | $ 20.00 | |
 Daily Vita | $ 20.30 | |
 iHerb | $ 21.42 |
Ingredients
| Ingredient | Amount per serving |
|---|---|
Vitamin K2 | 100 mcg |
Alfalfa powder | 250 mg |
Categories
Vitamin K 88
As a Vitamin K supplement, it provides the K2 (MK-4) form, which is superior to K1 for targeted bone and cardiovascular benefits. Its excellent value makes it a strong contender in the Vitamin K category.
Goals
MK-4 is highly effective for bone health, playing a crucial role in activating osteocalcin, a protein that integrates calcium into the bone matrix. This makes it a strong choice for supporting bone density and strength.
As an essential vitamin, K2 (MK-4) contributes significantly to overall well-being by supporting not just bone and heart health, but also other vital bodily functions where Vitamin K is involved, making it a valuable addition to a general health regimen.
Vitamin K2, including MK-4, is vital for heart health as it helps activate matrix Gla protein, which prevents calcium from depositing in arterial walls, thus supporting cardiovascular elasticity and function.
85 Value 
Vitamin K-2 100 mcg
NOW
4.8
★★★★★
(13824 ratings)
This alternative from NOW also offers K2 MK-4 at a competitive price (9 cents per serving), providing comparable benefits and excellent value within the K2 MK-4 category.
90 Value 
Vitamins D and K with Sea-lodine
Life Extension
4.8
★★★★★
(20811 ratings)
This alternative offers a very high dose of Vitamin K combined with Vitamin D, a synergistic duo for bone and heart health, providing a strong value proposition for comprehensive benefits for a slightly higher price per serving.
80 Value 
Prenatal Blend
Super Nutrition
4.5
★★★★★
(1930 ratings)
Although the price per serving for K alone is higher, this is a comprehensive prenatal multivitamin that includes K2, offering excellent overall nutritional value beyond just Vitamin K for specific life stages.
98 Performance 
ADK Vitamins
Codeage
4.8
★★★★★
(1294 ratings)
This alternative is superior because it provides a much higher dose of the superior K2 (MK-7) form with a longer half-life, and includes synergistic Vitamins A and D3 for comprehensive bone, heart, and immune support.
95 Performance 
Vitamin D3 & K2 Peach Apricot Flavor
Advanced Nutrition by Zahler
4.8
★★★★★
(463 ratings)
This product is better as it contains the more bioavailable K2 (MK-7) form and is combined with D3, a critical pairing that synergistically optimizes calcium regulation for bone and arterial health more effectively than MK-4 alone.
80 Performance 
Vitamin K2 Advantage 2200 mcg
Source Naturals
4.8
★★★★★
(356 ratings)
While more expensive, this alternative offers a higher dose of the superior K2 (MK-7) form (MenaQ7), which provides better bioavailability and a longer half-life compared to MK-4, making it potentially more effective for targeted benefits.
70 Budget 
Sentry Adults
21st Century
4.7
★★★★★
(23601 ratings)
This product offers a Vitamin K supplement (K1) at a significantly lower price per serving (4 cents), making it a more budget-friendly option for basic K supplementation, though it's not K2.
65 Budget 
Therapeutic-M
21st Century
4.7
★★★★★
(587 ratings)
Providing Vitamin K1 at 5 cents per serving, this is another very economical choice for those seeking fundamental K intake, at a lower cost than the K2 product.
65 Budget 
Vitamin K-1 100 mcg
Swanson Premium Brand
4.7
★★★★★
(459 ratings)
This K1 product offers a similar dose to the original but at 5 cents per serving, making it a cheaper option for general Vitamin K although it lacks the specific K2 benefits.
85 Value
Vitamin K-2 100 mcg
NOW
4.8
★★★★★
(13824 ratings)
This alternative from NOW also offers K2 MK-4 at a competitive price (9 cents per serving), providing comparable benefits and excellent value within the K2 MK-4 category.
90 Value
Vitamins D and K with Sea-lodine
Life Extension
4.8
★★★★★
(20811 ratings)
This alternative offers a very high dose of Vitamin K combined with Vitamin D, a synergistic duo for bone and heart health, providing a strong value proposition for comprehensive benefits for a slightly higher price per serving.
80 Value
Prenatal Blend
Super Nutrition
4.5
★★★★★
(1930 ratings)
Although the price per serving for K alone is higher, this is a comprehensive prenatal multivitamin that includes K2, offering excellent overall nutritional value beyond just Vitamin K for specific life stages.
98 Performance
ADK Vitamins
Codeage
4.8
★★★★★
(1294 ratings)
This alternative is superior because it provides a much higher dose of the superior K2 (MK-7) form with a longer half-life, and includes synergistic Vitamins A and D3 for comprehensive bone, heart, and immune support.
95 Performance
Vitamin D3 & K2 Peach Apricot Flavor
Advanced Nutrition by Zahler
4.8
★★★★★
(463 ratings)
This product is better as it contains the more bioavailable K2 (MK-7) form and is combined with D3, a critical pairing that synergistically optimizes calcium regulation for bone and arterial health more effectively than MK-4 alone.
80 Performance
Vitamin K2 Advantage 2200 mcg
Source Naturals
4.8
★★★★★
(356 ratings)
While more expensive, this alternative offers a higher dose of the superior K2 (MK-7) form (MenaQ7), which provides better bioavailability and a longer half-life compared to MK-4, making it potentially more effective for targeted benefits.