The amount of vitamin D in meat:

http://www.eurofir.org/eurofir/Downloads/ValueDocumentation/TestPapers/Purchas_2007.pdf

It's pretty small.

100g of cooked beef striploin is estimated to contain an average of 1.20ng of total vitamin D3, and 100g of cooked lamb leg steak is estimated to contain 2.59ng, although clearly the values obtained will depend heavily on the multiplier used with the 25OHD3.

So how does that tie in with the RDA?

http://en.wikipedia.org/wiki/Vitamin_D

one IU equals 25 ng

The RDAs currently are:

Adequate Intake has been defined as 200 IU/day for ages infant to 50, 400/day for 51-70, and 600/day over 70

So 100g of meat only provides 30 IU, when 400 IU per day is necessary.

Kallyn, that article rocks!! Thank you!! 

I got 25 minutes here on Vancouver Island at this time of year (overcast, wet concrete, pale skinned).  What's the consensus out there on supplements?  I definitely don't get that much outside at this time of year since it's dark when I go to work and dark when I come home!  I am gonna start going for walks on my lunch breaks and maybe coffee breaks too!  I give my kids 400 IU a day AND an omega supplement (oil) that has 200 IU.  They've basically followed paleo their whole lives (at the ripe age of 3 and 5) because of their food allergies to dairy, soy, wheat, corn, strawberries, and oranges. 

Certainly hasn't affected their growth though!  My 5 year old is "accelerating above the 99% percentile" for height.  But her favorite meal is salmon, broccoli and yams.  No kidding!  After christmas this year she was whining she wanted something good to eat.  And I asked her like what?  And she said...something good like broccoli.  I should have taped it!  anyways...off topic but..well whatever

The amount of vitamin D in meat:

http://www.eurofir.org/eurofir/Downloads/ValueDocumentation/TestPapers/Purchas_2007.pdf

It's pretty small.

Quote

100g of cooked beef striploin is estimated to contain an average of 1.20ng of total vitamin D3, and 100g of cooked lamb leg steak is estimated to contain 2.59ng, although clearly the values obtained will depend heavily on the multiplier used with the 25OHD3.

So how does that tie in with the RDA?

http://en.wikipedia.org/wiki/Vitamin_D

Quote

one IU equals 25 ng

The RDAs currently are:

Quote

Adequate Intake has been defined as 200 IU/day for ages infant to 50, 400/day for 51-70, and 600/day over 70

So 100g of meat only provides 30 IU, when 400 IU per day is necessary.

Have you looked into pork instead of beef ? Pork fat has 2800IU of Vitamin D3 per 100g of fat. That's how I get my Vitamin D.

I sometimes also supplement with raw herring that has huge vitamin D content.

Vitamin D is a fat soluble vitamin that is naturally present in very few foods, together with others, and available as a dietary supplement. Besides helping the body absorb calcium, vitamin D also helps the body to limit the amount of phosphorus and calcium in the blood.