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Top-Rated Products
Country Life Vitamin K-1 -- 100 mcg - 100 Tablets (7)
NSI Vitamin K2 Complex with MK-7 -- 400 mcg - 180 Softgels (4)
Jarrow Formulas MK-7 -- 90 mcg - 60 Softgels (6)
Source Naturals Vitamin K2 -- 60 Tablets (6)
Source Naturals Vitamin K -- 500 Mcg - 100 Tablets (4)
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Source Naturals Vitamin K -- 500 Mcg - 100 Tablets

Source Naturals Vitamin K -- 500 Mcg - 100 Tablets

Vitamin K, or phylloquinone, is a fat-soluble vitamin best known for its important function in the biological activity of several blood coagulation factors. Recent research has also shown a role for vitamin K in bone health. Vitamin K plays a key role in the synthesis of the bone proteins osteocalcin and matrix GLA-protein, which are involved in calcium and bone metabolism.

Average Customer Rating: 4.25 out of 5 4.3 out of 5
3 of 4 (75%) customers would recommend this product to a friend.
Product Details

Customer Reviews for Source Naturals Vitamin K -- 500 Mcg - 100 Tablets

Top 250 Contributor Top 250 Contributor
Overall Rating: 5 out of 5 5 out of 5
Pelvic Pain, August 1, 2008
By cthewigs
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I have spent many years in doctors' offices getting various tests for pelvic pain. The doctors never could tell me what was causing my pain. I finally read that Vitamin K deficiency can cause ovarian pain. I started taking these supplements in addition to my multivitamin. My pain has since diminished significantly."

Age: 35-44
Gender: Female
Daily supplement usage: 6+ supplements daily
Reason for usage: Specific health concern
Duration of use: 30-60 days
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Review 2 for Source Naturals Vitamin K -- 500 Mcg - 100 Tablets

Overall Rating: 2 out of 5 2 out of 5
disappointed, January 18, 2008
By pearly
Value: 2 out of 5 2 out of 5
Quality: 3 out of 5 3 out of 5
Effectiveness: 1 out of 5 1 out of 5
Satisfaction: 2 out of 5 2 out of 5

"i bought this for undereye circles. doesn't work. i will try topical cream next"

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Review 3 for Source Naturals Vitamin K -- 500 Mcg - 100 Tablets

Overall Rating: 5 out of 5 5 out of 5
GREAT PRODUCT! I'LL BE BACK, August 12, 2007
By brandi
Value: 5 out of 5 5 out of 5
Quality: 5 out of 5 5 out of 5
Effectiveness: 5 out of 5 5 out of 5
Satisfaction: 5 out of 5 5 out of 5

"I BOUGHT THIS BECAUSE MY HUSBAND HAS FREQUENT NOSE BLEEDS. THEY WORKED ALMOST IMEDIATELY. I RECC. TO ALL! THANKS"

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Ratings-Only Reviews for Source Naturals Vitamin K -- 500 Mcg - 100 Tablets Based on 1 ratings-only review
Overall Rating 5 out of 5 5 out of 5
Would recommend?: Yes  1 out of 1
Value 5 out of 5 5 out of 5
Quality 5 out of 5 5 out of 5
Effectiveness 5 out of 5 5 out of 5
Satisfaction 5 out of 5 5 out of 5