3

votes

Does the potency of Vitamin K2 diminish over time?

Answered on August 19, 2014
Created May 02, 2011 at 2:15 PM

Dr K has made reference to testing grass-fed butters for Vit K2 levels and has said that Kerrygold tested at zero before, which didn't help with some people's suspicions that KG may not be entirely grass fed. But tartare provided a link to a fact sheet advertisement in which Kerrygold proclaims in crystal clear verbiage that their "Cows are entirely grass-fed" and goes into much more detail. Also, sarah-ann, a long time PaleoHacker, says she lives an hour away from where the KG cows are pastured and the grass is super green.

So then I wonder... does the potency of Vitamin K2 diminish with time? If so, how long do we have before the value becomes reduced too much?

A727956fa3f943057c4edb08ad9e864e

(4183)

on June 04, 2011
at 02:25 PM

Actually Kerrygold is only made from summer milk, just found that out.

Ed71ab1c75c6a9bd217a599db0a3e117

(25477)

on May 04, 2011
at 12:43 AM

It's biologically plausible

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 05:48 PM

do you think the high levels of A and D in fermented cod liver oil can deplete K2 in butter oil? If so, would that mean that the Green Pastures blend is not the full package of three (A,D,K2) that they purport?

Medium avatar

(5136)

on May 02, 2011
at 05:19 PM

thanks for the mention, Jack! when we were in Ireland, we visited my husband's family's ancestral dairy farm in Tipperary, and all I can say is the Irish are still doing a lot of things right. Had to stick up for them a bit :)

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 04:38 PM

i think it would have been made several months ago. personally, i'd wait til deep summer before stockpiling.

A727956fa3f943057c4edb08ad9e864e

(4183)

on May 02, 2011
at 03:54 PM

This makes me wonder if I shouldn't start stockpiling the current stock of kerrygold in the supermarket.. :)

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 03:36 PM

yah that's a valid point about seasonal changes in grass nutrients. organic valley puts on their label that their pasture butter is only produced from may to september for that reason. maybe that explains the higher tested levels of K2. i wonder if a bright yellow batch of kerrygold produced in the spring/summer would test at higher levels of K2 as well. i was at a fancy restaurant this weekend and asked for 'real butter'. they came out with a bright white, completely tasteless waxy substance. the difference between that and the pasture butter that I have gotten used to is quite noticeable.

667f6c030b0245d71d8ef50c72b097dc

(15976)

on May 02, 2011
at 03:14 PM

I, too, think the seasonality of the butter is extremely important here. For what its worth, the WAP maintains that springtime butter, and all dairy for that matter, is higher in pretty much everything that is important, including of course K2.

77877f762c40637911396daa19b53094

(78467)

on May 02, 2011
at 02:21 PM

Great question! I have quite a few sticks of KG in the freezer....

  • Af1d286f0fd5c3949f59b4edf4d892f5

    asked by

    (18452)
  • Views
    3.1K
  • Last Activity
    1280D AGO
Frontpage book

Get FREE instant access to our Paleo For Beginners Guide & 15 FREE Recipes!

3 Answers

3
A727956fa3f943057c4edb08ad9e864e

on May 02, 2011
at 02:52 PM

I wonder if the K2 doesn't vary wildly with season. I know that the butter is different colours depending on the time of year. Hence why high vitamin butter oil is only from cows fed on summer pasture.

667f6c030b0245d71d8ef50c72b097dc

(15976)

on May 02, 2011
at 03:14 PM

I, too, think the seasonality of the butter is extremely important here. For what its worth, the WAP maintains that springtime butter, and all dairy for that matter, is higher in pretty much everything that is important, including of course K2.

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 04:38 PM

i think it would have been made several months ago. personally, i'd wait til deep summer before stockpiling.

A727956fa3f943057c4edb08ad9e864e

(4183)

on May 02, 2011
at 03:54 PM

This makes me wonder if I shouldn't start stockpiling the current stock of kerrygold in the supermarket.. :)

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 03:36 PM

yah that's a valid point about seasonal changes in grass nutrients. organic valley puts on their label that their pasture butter is only produced from may to september for that reason. maybe that explains the higher tested levels of K2. i wonder if a bright yellow batch of kerrygold produced in the spring/summer would test at higher levels of K2 as well. i was at a fancy restaurant this weekend and asked for 'real butter'. they came out with a bright white, completely tasteless waxy substance. the difference between that and the pasture butter that I have gotten used to is quite noticeable.

A727956fa3f943057c4edb08ad9e864e

(4183)

on June 04, 2011
at 02:25 PM

Actually Kerrygold is only made from summer milk, just found that out.

0
Medium avatar

(5136)

on May 02, 2011
at 05:05 PM

do you think the fact that some of the butter is cultured (unsalted) and some is not (salted) could affect this at all?

0
Ed71ab1c75c6a9bd217a599db0a3e117

(25477)

on May 02, 2011
at 04:43 PM

I have read some data that high levels of vitamin A and D can deplete vitamin k levels. That was not in humans but I follow k2 data closely. I think high levels of vitamin are problematic for many reasons

Ed71ab1c75c6a9bd217a599db0a3e117

(25477)

on May 04, 2011
at 12:43 AM

It's biologically plausible

Af1d286f0fd5c3949f59b4edf4d892f5

(18452)

on May 02, 2011
at 05:48 PM

do you think the high levels of A and D in fermented cod liver oil can deplete K2 in butter oil? If so, would that mean that the Green Pastures blend is not the full package of three (A,D,K2) that they purport?

Answer Question


Get FREE instant access to our
Paleo For Beginners Guide & 15 FREE Recipes!