PUFA And Carotene

Discussion in 'Polyunsaturated Fats, Seed Oils' started by j., Jan 18, 2013.

  1. j.

    j. Guest

    Ray Peat, when he says that PUFAs are bad for something, he often adds that carotene is bad for the same thing as well. So it makes me wonder about the differences between carotene and PUFA. Can carotene be potentially stored for years as well, as PUFA does?
     
  2. cliff

    cliff Member

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    I don't think so but it's unsaturated so it can have similar effects to PUFA
     
  3. gretchen

    gretchen Member

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    If you can find this for me, I appreciate it. Carotene remains big in skincare world.
     
  4. cliff

    cliff Member

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    EBS Lett. 1999 Oct 29;460(2):212-6. Enhancement of the UVA induction
    of haem oxygenase-1 expression by beta-carotene in human skin
    fibroblasts. Obermüller-Jevic UC, Francz PI, Frank J, Flaccus A,
    Biesalski HK. Department of Biological Chemistry and Nutrition,
    University of Hohenheim, Fruwirthstrasse 12, D-70593, Stuttgart,
    Germany. beta-Carotene has often been discussed as a means to reduce
    the risk of skin photodamage. We studied the antioxidative potential
    of beta-carotene in human skin fibroblasts exposed to ultraviolet A
    light. Surprisingly, we found a pro-oxidative effect of
    beta-carotene.
    Using the induction of haem oxygenase-1 as a marker
    for oxidative stress, we found a strong enhancement of gene expression
    by beta-carotene in ultraviolet A-irradiated cells. This effect was
    clearly suppressed by concomitant addition of vitamin E but only
    moderately by vitamin C. The results show that beta-carotene has
    pro-oxidative properties in human skin fibroblasts exposed to
    ultraviolet-A light
     
  5. gabriel79

    gabriel79 Member

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    Hi J, Carotenes are liposoluble, so they're stored in the fat tissues. That means it may take a while to get rid of (months), but I don't think they're stored for years as PUFAs, because carotenes aren't used to build the cells structures like PUFAs.
     
  6. gretchen

    gretchen Member

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    Wow, even more reasons not to drink green juice. Thanks.
     
  7. John Eels

    John Eels Member

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    What about the carotene in the carrot?
     
  8. Birdie

    Birdie Member

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    The carotene is a reason to rinse the grated carrot until the water runs colorless.
    If you are not concerned with carotene buildup, you don't need to grate and rinse.
     
  9. John Eels

    John Eels Member

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    It's only the layer below the outer skin that one grates of that contains carotene?
     
  10. OP
    j.

    j. Guest

    No. The whole thing has it. But I think not much is absorbed if the carrot isn't cooked. By the way, what's wrong with carotene is that while some of it can be converted to vit A, what isn't converted acts like a PUFA.
     
  11. John Eels

    John Eels Member

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    Thank you j. for the clarification. Do you you rinse the grated carrot? It seems tedious to do every day.
     
  12. kiran

    kiran Member

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    Not half as tedious as grating the carrot.
     
  13. OP
    j.

    j. Guest

    I actually just get rid of the weird spots in the outer part of the carrot and eat it without even grating it. But I do remember that my poop had much better shape when I grated it and added some oil.
     
  14. John Eels

    John Eels Member

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    You use a cloth and wash the carrots? One similar to strain OJ?

    Grating carrots is somewhat laborious. Could you do a batch for several days? How long do they stay fresh? That'd be great. Keep a container of grated carrot in your fridge.
     
  15. OP
    j.

    j. Guest

    I wash the carrot and then use a knife to peel the outer part a little bit. But I "should" grate it.

    I think nwo mentioned that when he grates carrots and keeps them in the fridge, they lose a bit of color, and he thinks they lose carotene.
     
  16. nwo2012

    nwo2012 Member

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    Easy solution. You buy an electric grater for about $30. Grate enough carrot for the week. Use a large strainer/sieve and keep running water through the grated carrot until the water runs clear. I also use one hand to squeeze the living crap out of the carrot while the water runs. I then pour through some distilled water. Keep grated carrot in a large bowl in the fridge, then take out enough for each day and add coconut oil and vinegar. Eat.

    Edit: Yes the slightly orange bits tend to turn white over time so yes I think some of the carotene is lost over time. I guess that's why those health freaks that juice carrots, lol, recommend to drink it right away or risk losing lots of the healthful beta carotene. :lol:
     
  17. OP
    j.

    j. Guest

    Very ingenious.
     
  18. nwo2012

    nwo2012 Member

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    Hehe. I just like to be organised. This way in a busy working week nothing gets missed. There are 3 of us eating the carrot salad daily (can't quite get the youngest to eat it just yet) so this is a great time saver.
     
  19. John Eels

    John Eels Member

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    So there is no problem with keeping the carrot salad for a week? It remains valuable?
     
  20. Luann

    Luann Member

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    just buy bamboo shoots
     
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