Announcement

Collapse
No announcement yet.

Vitamin D (D3) supplements are a product of irradiation?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Vitamin D (D3) supplements are a product of irradiation?

    Hi all,


    Something in my research on Vitamin D (D3 form, Cholecalciferol) has alarmed me.

    Cholecalciferol is produced industrially by the irradiation of 7-dehydrocholesterol extracted from lanolin found in sheep's wool.
    Source: Wikipedia..verified elsewhere.

    Aren't we all meant to be avoiding goods that are irradiated or is it ok in this instance? I hope I've missed something.

    Unless it's a different kind of irradiation process, there's a worldwide fuss over the irradiation of food such as eggs, vegetables and so on, currently. They suggest it might
    cause chemical changes which are harmful to the consumer
    What's your take on it guys & girls?


    P.S. also - even though I live in Australia, I spend a lot of my time in an office, so I feel I don't get anywhere near the amount of sun exposure I need to produce sufficient Vitamin D myself.
    Hence.. the hunt for a D3 supplement.
    Last edited by OnTheRun; 05-07-2010, 05:44 PM. Reason: added info.

  • #2
    Most D3 supplements are fish liver-sourced (and will say so on the label) so I wouldn't worry about it. When I used to sell vitamins, we only had one brand that even made a lanolin-sourced D3.
    http://www.prettyinprimal.blogspot.com

    Comment


    • #3
      Originally posted by hazyjane View Post
      Most D3 supplements are fish liver-sourced (and will say so on the label) so I wouldn't worry about it. When I used to sell vitamins, we only had one brand that even made a lanolin-sourced D3.
      What? No. I have never found a D3 supplement that's not made from lanolin. It seems pretty safe. It's better than D2 at least...
      .`.><((((> .`.><((((>.`.><((((>.`.><(( ((>
      ><((((> .`.><((((>.`.><((((>.`.><(( ((>

      Comment


      • #4
        Arrggh now I want to throw my D3 away because of this.
        .`.><((((> .`.><((((>.`.><((((>.`.><(( ((>
        ><((((> .`.><((((>.`.><((((>.`.><(( ((>

        Comment


        • #5
          This is just what I was talking about on the thread I started today: http://www.marksdailyapple.com/forum...sed-about-diet

          Comment


          • #6
            With regard to Cod Liver Oil and Vitamin D, a Weston A Price article has the following to say:

            from the 5 steps of typical CLO manufacturing:
            4. Deodorization, which removes pesticides, PCBs, most of vitamin D and quite a bit of the vitamin A.
            5. Add vitamins (either natural or synthetic) to meet standards or the requirements of the retailers.

            ...


            Each of the first three stages removes some vitamins but it is the deodorization step that takes out the most. This is why processors then add the vitamins back in. The shocking discovery I made is that usually the vitamins added are synthetic--retinol palmitate and vitamin D3 made by irradiating lanolin with ultra-violet light.
            Source

            I can't imagine the manufacturers would be able [or have incentive] to save the vitamins & minerals being removed during that process?

            Interestingly in another article on their site, there are brand recommendations for high quality oils, with 'tips' geographically. From what I can tell, these oils will contain large amounts of 'natural' Vitamin D... so may be a far better source of Vitamin D than D3 tablets, of which a large proportion (99.99%?) seem to be made via the irradiation process I described in the original post.

            Looks like the Blue Ice brand might be the go for me! Raw, organic flavoured options. Pretty expensive... Maybe I'll just go shirtless during my lunch break lol
            Last edited by OnTheRun; 05-08-2010, 11:29 PM.

            Comment


            • #7
              Originally posted by rphlslv View Post
              What? No. I have never found a D3 supplement that's not made from lanolin. It seems pretty safe. It's better than D2 at least...
              Well, I worked as a supplement retail buyer for a decade and there are plenty of brands that use fish liver oil and not lanolin.
              Here are some:
              Jarrow
              Carlson
              Nordic Naturals
              Bluebonet
              Solgar
              Solaray
              Kal
              http://www.prettyinprimal.blogspot.com

              Comment


              • #8
                And, yes- it's safe.
                For those concerned about irradiated lanolin, it's not "irradiated" like food is; it's exposed to UVB radiation, which is necessary to convert it to cholcalciferol- just like our skin is exposed to solar radiation and produces D. Remember, there are different forms of radiation and "irradiation" is simply an umbrella term for radiation exposure. They're not "nuking" it, if that's what you're concerned about (since they're not using gamma rays or electron beams):

                One practice for generating the D3 found in supplements involves sheep's wool. Sheep (and many other animals) have sebaceous glands in their skin that secrete a complex variety of substances, including cholesterol (in the form of 7-dehydrocholesterol). The secretions from the sebaceous glands naturally find their way into the animal's fur. A supplement manufacturer wanting to produce vitamin D3 supplements can remove the secretions from the fur (in this case sheep's wool), process and purify the 7-dehydrocholesterol, expose it to UVB (ultra-violet B) light, and thereby convert it into cholecalciferol.
                http://www.prettyinprimal.blogspot.com

                Comment


                • #9
                  Originally posted by hazyjane View Post
                  Most D3 supplements are fish liver-sourced (and will say so on the label) so I wouldn't worry about it. When I used to sell vitamins, we only had one brand that even made a lanolin-sourced D3.
                  Most are lanolin sourced now. It's rare to find fish liver sourced by like hazyjane said, it's fine.

                  There is a huge and growing body of vitamin D evidence using supplements - lanolin sourced supplements.

                  Take them when you cant sufficient D from the sun (which is most of the time). It's too important. Too incredibly important.

                  K



                  iherb referral code CIL457- $5 off first order

                  Comment


                  • #10
                    It's been 2 years since I quit the supplement retail and I wonder if they are using lanolin more now due to dwindling fisheries? At any rate, I think lanolin is just fine and yes, it's so important to get adequate D. Many people of northern European descent and also people with thyroid issues don't adequately manufacture D from sunlight.
                    There's a doc in San Diego (very sunny all year-round) who says that the majority of his patents test deficient in D. That doesn't bode so well for the rest of us in non sunny locales! I'd like to get my levels tested.
                    http://www.prettyinprimal.blogspot.com

                    Comment


                    • #11
                      Originally posted by hazyjane View Post
                      Well, I worked as a supplement retail buyer for a decade and there are plenty of brands that use fish liver oil and not lanolin.
                      Here are some:
                      Jarrow
                      Carlson
                      Nordic Naturals
                      Bluebonet
                      Solgar
                      Solaray
                      Kal
                      Wow, I didn't know. I looked into some of them and their dosages are so high in Vit A but so low in Vit D3...
                      .`.><((((> .`.><((((>.`.><((((>.`.><(( ((>
                      ><((((> .`.><((((>.`.><((((>.`.><(( ((>

                      Comment


                      • #12
                        Originally posted by hazyjane View Post
                        And, yes- it's safe.
                        For those concerned about irradiated lanolin, it's not "irradiated" like food is; it's exposed to UVB radiation
                        Thank you for mentioning that hazyjane - for whatever reason, I didn't find the type of irradiation in my search. D'oh. It's the food-type irradiation that worries me (i.e. gamma), as you said.

                        In light of this, I went ahead and ordered Dr Mercola's Vitamin D spray. People will have split opinions on the guy, but I feel his his advice and products are legit. Scored free international shipping, too, as part of the Mother's Day promotion (til May 11) + a further 10% off via promo code. Surprisingly my 3 month initial supply works out quite economical!

                        Based off their recommended dosage, I should get 30-34 days @ 6000IU/day from each bottle, which leaves a decent margin for incidental/additional sun exposure... assuming 10,000IU/day is absolutely optimal.

                        Fwiw most of the brands recommended in this thread are not readily available to me here, which is a shame. Many of the most common (and less pricey) ones in Australia contain sulfites (as sodium sulfite), which as an [part-time ] asthmatic, I try to avoid...for better or worse. This should complement my high dose fish oil & B12 regimen nicely!

                        Thanks for all the quality input. I hope it's helping others just as it's helping me.

                        Comment


                        • #13
                          Originally posted by hazyjane View Post
                          It's been 2 years since I quit the supplement retail and I wonder if they are using lanolin more now due to dwindling fisheries? At any rate, I think lanolin is just fine and yes, it's so important to get adequate D. Many people of northern European descent and also people with thyroid issues don't adequately manufacture D from sunlight.
                          They do if they get enough sunlight. It's not a problem of mfg in the skin, it's a problem with inadequate UV exposure due to latitude and lifestyle.


                          I'm in atlanta....mine were 24 or 26 the first go around, six years ago. At the time, lab norms still said 20 ng/mL was acceptable - thank goodness we all know better now And thank goodness for the brilliant Krispin Sullivan who said 'nope, they need to be above 50". Fast forward a few years, I became much much more sun protective and even at 2 000 IU per day, my levels were back down to *20* ng/mL.

                          Anyone wanting their D levels tested should consider joining the Grassroots Health study.
                          http://grassrootshealth.net/

                          Best,
                          Katherine



                          iherb referral code CIL457- $5 off first order

                          Comment


                          • #14
                            Ooer great link (the first one I mean). Bookmarked and added to an all too vast accumulation of things to read.
                            Stabbing conventional wisdom in its face.

                            Anyone who wants to talk nutrition should PM me!

                            Comment


                            • #15
                              10,000 IU per day is not optimal....it's too much for many people getting D from sun. A dear friend here is getting 10,000 IU per day and is maintaining serum 25OHD levels of 140 ng/mL - 40% higher than what is achievable though even the most extreme day long miami sun exposure.

                              It's just not biologically appropriate or smart.

                              K



                              iherb referral code CIL457- $5 off first order

                              Comment

                              Working...
                              X