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Thread: Too much B12 and Selenium? page

  1. #1
    lakawak's Avatar
    lakawak is offline Junior Member
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    Too much B12 and Selenium?

    Hello, I've been reading a lot about the primal diet/lifestyle for the last few weeks and I've been making a lot of changes in my diet. My mother makes the dinner, sometimes it's primal and sometimes it's not. Other than that I'm totally primal.

    Anyway, I've started eating 9 eggs and about 150g of sardines each day. I put my daily food intake into FitDay and it says I'm getting 18.4 mcg of Vitamin B12 and 238.4 mcg of Selenium. That's 768% and 433% of the RDA, respectively. Virtually all of this is coming from the eggs and sardines. I didn't even include my dinner as I don't know the exact portion sizes, so I'm sure I'm getting even more from that.

    My question is: should I worry about getting that much Vitamin B12 and Selenium on a regular basis?

  2. #2
    jammies's Avatar
    jammies is offline Senior Member
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    B12 is water soluble and you should just urinate out excess. Selenium can be toxic, but at closer to 400 mcg per day. I had no idea you could get so much from eggs and sardines!

    Selenium

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    jammies's Avatar
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    Quote Originally Posted by jammies View Post
    B12 is water soluble and you should just urinate out excess. Selenium can be toxic, but at closer to 400 mcg per day. I had no idea you could get so much from eggs and sardines!

    Selenium
    If you are worried you could swap out some of your sardines for some canned salmon - it has half the selenium of sardines.

  4. #4
    lakawak's Avatar
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    Thanks. I actually was eating canned salmon, but I switched to sardines as they are cheaper. I might switch back.

  5. #5
    SuperIvy69's Avatar
    SuperIvy69 is offline Junior Member
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    I read that 400mcg was set as a limit to balance nutrient intake and not as a toxic threshold. Wikepedia makes a reference to the safe upper limit being 15mcg per Kg of body weight. That gives me a safe upper limit of 1,610 mcg per day. This is somewhat comforting as I just checked my last three days on Fitday and spiked at 800+mcg over two days.

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