Question 1

I see that the source of K2 is mk-4 but how is it derived? Soy, natto, chickpeas??

Accepted Answer

I wondered too because the picture showing the ingredients mysteriously cut off what type of menaquinone it is.

I learned it contains menaquinone-4, aka mk-4, or menatetrenone. There was no info regarding its source. In fact, although the product description here fully explains its source of vitamin D3, it omits saying anything about their K2 source. I found this as odd as the ingredients picture, and it was only for this reason that I decided I'd better check.

Menaquinone-7 (mk-7) is the long-chain version (menaquinone-4 is short-chain) and it's generally accepted as a superb source, often derived from fermented natto. Even though natto is made from soybeans, by the time mk-7 is synthesized from this, realistically, no soy remains.

This is from an NCBI study: "The current study shows that MK-4 has a poor bioavailability at a nutritional level dose, whereas MK-7 is well absorbed and detectable in the blood at nutritional levels. "

I am so surprised Seeking Health is not using mk-7. They're usually a trusted manufacturer for me, but not in this instance.

Be sure to check the type of K2 in whatever supplement you get because there are also synthetic forms that should be avoided.

Anyway, it's good someone questioned this, and I almost missed it completely by assuming Seeking Health would use only the best sources. 🤷‍♂️ 
It pays to check every detail.

Question 2

Is this supposed to have a bitter taste?

Accepted Answer

I love Seeking Health however the vitamin D3 K2 is terrible tasting.. Yes it’s bitter. I believe it’s the olive oil they use. Very bitter and makes my throat burn. I switched to Thorn Vit D3 K2 and have not had the same issue. Hope that answers your question.

Question 3

What is the source of the K2 in this supplement ?

Accepted Answer

Seeking Health has a D3 with K2 now in pill form. It states 100 mcg of K2 (as menaquinone-7). 
The liquid bottle just lists K2 and has no other source listed on the label.

Question 4

Is this product gluten-free? I know it doesn't contain any gluten ingredients, but is cross contamination a possibility?

Accepted Answer

We have gluten issues in our home and I have not seen a reaction. Unfortunately I’m just a customer so I can’t say what their practices are to prevent cross contamination, if any.

ASIN	B07HPDQH2J
ASIN	B07HPDQH2J
Age Range Description	Adult
Allergen Information	Abalone
Best Sellers Rank	#29,791 in Health & Household ( See Top 100 in Health & Household ) #135 in Vitamin D3 & K2 Combinations
Brand Name	Seeking Health
Customer Reviews	4.7 4.7 out of 5 stars (760)
Date First Available	November 12, 2018
Diet Type	Vegetarian
Dosage Form	Liquid
Flavor	Unflavored
Is Discontinued By Manufacturer	No
Item Dimensions	1.31 x 1.31 x 4.38 inches
Item Form	Drop
Item Weight	0.15 Pounds
Item model number	VITDK-1OZ-LIQ-A
Manufacturer	Seeking Health
Manufacturer	Seeking Health
Manufacturer Part Number	VITDK-1OZ-LIQ-A
Model Number	VITDK-1OZ-LIQ-A
Number of Items	1
Primary Supplement Type	Vitamin D3, Vitamin K2
Product Benefits	Bone Health
Product Dimensions	1.31 x 1.31 x 4.38 inches; 2.4 ounces
Specific Uses For Product	Supports bone health
UPC	810007521350
Unit Count	1.00 Fluid Ounces

Vitamin D3 + K2 Drops - Liquid Vitamin D & K Supports Immune System Function & Bone Health - Aids Calcium Absorption - Aids Healthy Blood Flow & Circulation - 1 Fl oz (30 ML)

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