Vitamin K2 MK-7 100mcg

Name: NOW Foods Vitamin K2 MK-7 100mcg
Brand: NOW Foods
Price: 15.99 USD
Availability: InStock

The essential companion to Vitamin D that most people forget. MK-7 is the most bioavailable form of K2, directing calcium into bones and away from arteries. At $0.13/serving, outstanding value.

82/ 100

Biorank Score

Independently ranked

82/ 100

Biorank Score

Independently ranked by Biorank Laboratories

Our Verdict

Worth Buying

NOW Foods K2 MK-7 scores well because it delivers the most bioavailable and longest-acting form of K2 at a dose supported by clinical evidence. The exceptional value ($0.13/serving) and clean formulation earn high marks. No hype penalty because K2 is genuinely underappreciated and under-marketed compared to its evidence base. The evidence score reflects that while observational data is strong, large interventional RCTs are still limited.

Key Findings

MK-7 has a 72-hour half-life vs. ~1 hour for MK-4, making once-daily dosing effective
Rotterdam Study (n=4,807) linked high K2 intake to 50% reduced arterial calcification risk
Knapen et al. (2013) showed MK-7 improved bone strength in postmenopausal women over 3 years
Essential companion to Vitamin D — directs calcium to bones instead of arteries
Exceptional value at $0.13/serving — one of the cheapest evidence-backed supplements

Evidence Analysis

Vitamin K2 (menaquinone-7) has growing evidence for bone and cardiovascular health. Knapen et al. (2013) showed 180mcg MK-7 daily for 3 years improved bone mineral content and femoral neck strength in postmenopausal women. Geleijnse et al. (2004, Rotterdam Study, n=4,807) found high dietary K2 intake associated with 50% reduced risk of arterial calcification and cardiovascular mortality. MK-7 has a longer half-life (~72 hours) than MK-4 (~1 hour), making once-daily dosing effective. The 100mcg dose is within the range studied in positive trials.

Ingredient Breakdown

Ingredient	Dose	Effective Dose	Adequacy	Verdict
Vitamin K2 (MK-7, MenaQ7)	100mcg	100-200mcg		Adequate

True Cost Analysis

Properly Dosed -- What You Pay Is What You Get

Listed Price

$0.13/serving

$3.90/month at 1 serving/day

True Cost Per Effective Dose

$0.13/effective dose

$3.90/month for effective dosing

Value Score

Excellent value

Save $0.60/month (15%)

by switching to NOW Foods Vitamin C-1000

Where It Falls Short

Most strong evidence is observational (Rotterdam Study). Interventional RCTs are smaller and fewer than for Vitamin D. 100mcg is at the lower end of studied doses — some trials used 180-360mcg. Does not include Vitamin D, which works synergistically. People on warfarin must consult their doctor, as K2 can interfere with anticoagulation.