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Thorne Research, Vitamin K2, 1 fl oz (30 ml)

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In Stock
  • Expiration Date: Jan 2018
  • Shipping Weight: 0.25 lbs (0.11 kg)
  • Product Code: THR-17001
  • UPC Code: 693749170013
  • Package Quantity: 1 fl oz (30 ml)
  • Dimensions: 4 x 1.2 x 1.2 in, 0.15 lbs (0.07 kg)
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Product Overview


  • Dietary Supplement
  • Effective in Maintaining Bone Health
  • Combine with Vitamin D for Optimal Bone Health
  • Supports a healthy cardiovascular system
  • Provides Nutritional Support for Oncology Patients

Vitamin K2 exerts a more powerful influence on bone than does vitamin K1.* Vitamin K2 is a series of molecules known as menaquinones, some of which are found naturally in fermented soybeans. The most common and well studied of the menaquinones is MK-4. Thorne's vitamin K2 is MK-4.

Vitamin K2 appears to offer significant benefit for supporting bone health. Although much of the vitamin K2 research has been conducted on postmenopausal support for bones, because vitamin K2 does not have any estrogenic effects, vitamin K2 also offers bone support for other populations, including anorexics, dialysis patients, individuals with Parkinson's disease, those who have cirrhosis of the liver, individuals who have had a bone marrow transplant, those immobilized after a stroke, and individuals on chronic steroid therapy.

Thorne's Vitamin K2 Liquid supplies 1 mg of vitamin K2 per drop. Research shows doses up to 15 mg three times daily may be used.

Suggested Use

Take 15 drops one to three times daily or as recommended by your health-care practitioner.

Other Ingredients

Medium chain triglyceride oil, mixed tocopherols.


Tamper Evident: Use only if bottle is sealed.

If pregnant, consult your health-care practitioner before using this product.

Store tightly sealed in a cool, dry place.

Supplement Facts
Serving Size: Fifteen Drops
Servings per Container: 80
15 Drops Contain: Amount Per Serving % DV
Vitamin K (as Vitamin K2 (Menatetrenone))† 15 mg 18,750%
Daily Value (DV)
iHerb Customer Reviews

2nd purchase

Posted by ForGoodHealth on Jan 07, 2017

Though expensive, it is value for money compared to other brands. I use only 1 drop a day for myself and family members. Expiry date a bit short, not able to finish the previous one before it expires. Though only has MK4 no MK7 still good to have some form of K2. Use it mainly for preventive maintenance.

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Posted by tripleschizo on Dec 09, 2016


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it is too soon to tell and a lot a confusion going on

Posted by 5389865409077199298 on Dec 05, 2016

It is too soon to give review regarding the effectiveness of vitamin K2 supplement. But first think from the label, it is not clear which form of the vit. K2 the supplement provides – MK-4 or MK-7. Second – if it is 15drops=15mg of MK-7, this is way too much. The daily recommended dose for MK-7 is 120mcg for males and 90mcg for females. So according to the instructions 15drops = 15000mcg or if we take them 3 times daily there will be 45000mcg. Sure there are different individual cases and needs for vitamin K2, but I do not think anybody needs that much. And the supplement is already extremely expansive. So I would say before spend that much money, make sure how much you need. For prophylactic I am planning to take 1 drop per day (which is already 1000mcg), but at the same time I am not sure if this is MK-4 or MK-7, or combination of both. That’s’ why I said we spend money on something that we are not sure what is it – is it MK-4 or MK7? If it is MK-4 we need 45mg daily, which is 3 times 15 drops…..iHERB, what you guys selling exactly?

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Posted by 4930245656316252591 on Dec 05, 2016

Taking for oateoporosis. The studies using this mk4 rather than mk7/were what led me to trial this. Having seen later studies that totally rwfure the original ones I'm not convinced this is any more effective than mk7. Will update ony next dexa bone scan

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Well worth the money!

Posted by Reviewer1716659 on Aug 30, 2016

A disclaimer: I am using this in conjunction with Dr. Price's fermented fish oil and high vitamin butter oil (a natural source of K2-M4). It is this combination that Dr. Price was convinced worked wonders in his test subjects. I've been taking this combo for over 10 years now ... I just had a complete vascular scan and I have ZERO calcification of my arteries. (A 40% blockage is considered normal for my age group) I decided to augment my dose with this Thorne Research version because the butter oil capsules do not state the strength of the dose. I am very happy to be using a natural source of K2-M4, but always wondered if I was getting enough. I have been using the increased dose for 7 months now and I believe that I have three teeth that are re-mineralizing. I have had 'pockets' for years and years and they have filled in. (This was on the back of the three bottom, front, teeth.) I'm a very happy camper!

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