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How long does PUFA stay in your body?

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  • How long does PUFA stay in your body?

    Let's assume I ate a SAD diet for many years so my body is totally riddled with gram after gram of polyunsaturated fat. Let's also assume I have approximately 60 lbs of body fat and 150 lbs of lean mass. (Because I do.)

    Assuming I was immediately able to reduce my PUFA intake to <10g per day, how long would it take before it was replaced with healthier fat? Would it matter if I improved my body composition to go from ~28% fat to ~12%?

    Trying to get a handle on how fast I can reverse the damage and what the best strategy is to do so.

    Thanks!
    __________________________________________________ _____________________________
    Eureka5280: M / 38 / 235lbs / Goal: 180lbs

    Diet: Currently experimenting with higher carb (Peat-esque) primal with emphasis on beef, dairy, seafood, sugar and a bit of starch on lifting days.

    Activities: Started Stronglifts 5x5 on 3/1/14. Adding sprints and hikes soon.
    End of Year Working Set Goals: Squats-250, Bench-200, DL-315

  • #2
    You'll never be PUFA-free but it can take up to 4 years to get rid of excess.
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    • #3
      Thanks j3nn. Do you have a source for that? Any idea what the mechanism is for removing it?
      __________________________________________________ _____________________________
      Eureka5280: M / 38 / 235lbs / Goal: 180lbs

      Diet: Currently experimenting with higher carb (Peat-esque) primal with emphasis on beef, dairy, seafood, sugar and a bit of starch on lifting days.

      Activities: Started Stronglifts 5x5 on 3/1/14. Adding sprints and hikes soon.
      End of Year Working Set Goals: Squats-250, Bench-200, DL-315

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      • #4
        It's just as your body mobilises the fat stored in your adipose tissue.

        And yes, reducing your bf% is a great way to liberate the PUFAs stored in your body.
        Disclaimer: I eat 'meat and vegetables' ala Primal, although I don't agree with the carb curve. I like Perfect Health Diet and WAPF Lactofermentation a lot.

        Griff's cholesterol primer
        5,000 Cal Fat <> 5,000 Cal Carbs
        Winterbike: What I eat every day is what other people eat to treat themselves.
        TQP: I find for me that nutrition is much more important than what I do in the gym.
        bloodorchid is always right

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        • #5
          It's an excellent question but I'm not sure anyone can answer it with certainty (analyzing a live person's adipose is not common). Maybe browse the citations here.
          37//6'3"/185

          My peculiar nutrition glossary and shopping list

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          • #6
            Originally posted by picklepete View Post
            It's an excellent question but I'm not sure anyone can answer it with certainty (analyzing a live person's adipose is not common). Maybe browse the citations here.
            Thanks Pete! PHD is my other favorite nutrition resource, although I have to say trying to wade through the actual studies tends to make my brain hurt. I'll give those a look.
            __________________________________________________ _____________________________
            Eureka5280: M / 38 / 235lbs / Goal: 180lbs

            Diet: Currently experimenting with higher carb (Peat-esque) primal with emphasis on beef, dairy, seafood, sugar and a bit of starch on lifting days.

            Activities: Started Stronglifts 5x5 on 3/1/14. Adding sprints and hikes soon.
            End of Year Working Set Goals: Squats-250, Bench-200, DL-315

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            • #7
              the half-life of adipose tissue is about 600 days. 1,6 the fractional turnover rate 2/t which is 0.12% per day, so it's completely replaced in about 800 to 900 days. can shorten this though.
              Make America Great Again

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              • #8
                Originally posted by j3nn View Post
                You'll never be PUFA-free but it can take up to 4 years to get rid of excess.
                I saw a study that a heavy coconut oil diet can cause you to be completely EFA deficient in a few years. I'll link it when I get home.
                Make America Great Again

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                • #9
                  Originally posted by Eureka5280 View Post
                  Thanks Pete! PHD is my other favorite nutrition resource, although I have to say trying to wade through the actual studies tends to make my brain hurt. I'll give those a look.
                  PJ has visited a ton of podcasts. I think in one he mentioned that the big active tissues have a mechanism in place to disfavor poly as an energy substrate to preserve it for it's other functions but adipose doesn't discriminate so when we consume soybean-oil levels that's where the overspill will pile up. Thankfully I'm pretty sure they keep circulating and offering themselves to the furnace so any intake reduction will help, especially during periods of net adipose efflux (weight loss).
                  37//6'3"/185

                  My peculiar nutrition glossary and shopping list

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                  • #10
                    Dunno, but I hope it's not too long. *looks at the mini can of Pringles she just ate* Vegetable oil... I am terrible when I go to the office.
                    Out of context quote for the day:

                    Clearly Gorbag is so awesome he should be cloned, reproducing in the normal manner would only dilute his awesomeness. - Urban Forager

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                    • #11
                      Originally posted by Wildrose View Post
                      Dunno, but I hope it's not too long. *looks at the mini can of Pringles she just ate* Vegetable oil... I am terrible when I go to the office.
                      Take some vitamin e
                      Make America Great Again

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                      • #12
                        If you keep PUFA below 10 grams most of the time, but end up eating a meal or having a day with a good amount (for example french fries, normal restaurant food), does that get rid of the progress you've made? Assuming you have a day like this once every 2-3 months.

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                        • #13
                          Nah occasionally it's no issue I just take some e, aspirin, and niacinamide
                          Make America Great Again

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                          • #14
                            On the same note, if you are eating a deficit in keto, will small amounts of bad fats just be used for fuel instead of poisoning the body?
                            Crohn's, doing SCD

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                            • #15
                              Originally posted by Knifegill View Post
                              On the same note, if you are eating a deficit in keto, will small amounts of bad fats just be used for fuel instead of poisoning the body?
                              healthy cells are lipophilic, saturated fatty acids would have a greater tendency to enter them than the more water soluble polyunsaturated fats, especially those with 4, 5, or 6 double bonds. oxidation of unsaturated fatty acids would essentially be the same process as for saturated fats, but not when a double bond is encountered. also, very-long-chain fatty acids are mostly oxidized in peroxisomes.

                              no, it always poisons you. just get a better rate of saturated. I think people who eat mostly red meat get under 10g of PUFA.
                              Make America Great Again

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