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26 seconds to absorb into bloodstream?
  • Hi Beauty Brains,
    I've read your previous blog posts on our exposure to cosmetic chemicals, but was wondering what your view is on the information flying around the internet that it takes 26 seconds to absorb chemicals from cosmetics into your bloodstream. All of these posters claim this statistic is based on 'studies', but I have yet to see a study which demonstrates this. As many of the chemicals in our cosmetics cannot be absorbed at all, I can't help but wonder if this is a myth. What do you think?
  • ITS A LIE SKIN IS MADE TO KEEP STUFF OUT!! The only thing that really gets into your bloodstream is transdermal drugs but I'm sure they dont have such a specific time like 26 seconds lol
  • That's an interesting question. Do you have a link to someplace where you've seen this mentioned? 
  • I've seen it mentioned in lots of different places, including infographics on Facebook. Some examples include:

    http://purehomeandbody.com/cleansing-and-detox/detox/cleansing-from-the-inside-out/
    http://www.lexiyoga.com/whats-toxic-in-your-home
    http://www.botanicaltans.com/1/post/2012/06/is-dha-really-bad-for-you.html
    http://www.jinshinjyutsu-mercedes.com/17701.html
    http://www.complementaryfitness.co.uk/news/fitness-newsletter-14-january/
    http://www.cleaningpro.com/toxic.cfm

    This is just a handful of links out there that mention this 'fact'. If you go to Google and type in '26 seconds to absorb chemicals into bloodstream' you'll see what I mean.

    26 seconds just seems so very specific and as no one seems to be able to back this up with any studies or facts, I can't help but think that it's based on nothing. What do you think, Right Brain?


  • I saw an interesting contrast between two studies of parabens, in vitro and in vivo - the first seem custom designed to feed hysteria, but in living skin, the esterases (okay I think it was them lol) fend off parabens so nearly nothing absorbs, even if you're against them - which if they absorbed that much, guess I'd have to reconsider. 

    That was at this site, which has a lot of good stuff that might be of interest:  http://personalcaretruth.com/



  • This whole "26 seconds" idea looks worth of a closer look. We're a bit backed up right now but I'll try to poke around and see what I can find out.
  • Only transdermal drugs can get into your blood stream. For example I am on the birth control patch. They use technologies not used in personal care products. It would make no sense for body wash to be able to get in your blood stream and I think the skin does a heck of a job keeping stuff out on its on.
  • Did you have a chance to look into this in more detail, Right brain? This goes hand in hand with all these "facts" on the Internet which say that your body absorbs 60%, 80%, 90% (it differs all the time apparently!) of what you put on your skin.
  • It's on our list of topics currently in research.
  • this absorption issue is close to my heart. i use a bio-identical hormone cream that MUST go from the skin into bloodstream, otherwise it couldn't affect hormone levels, which it does. with this in mind, i have been making my own skin treatment using only oils, including those that solidify at room temperature so they are in solid form and easy to apply. with no preservatives and nothing added to prevent absorption of a preservative, i was hoping these oils would absorb into the second layer of epidermis and from there get into the bloodstream. i had thought that items sold over the counter have to have a preservative to keep them good for a long time, so something like methylparaben with a molecule too big for the skin to absorb was added to over-the-counter products for the purpose of keeping the preservative and other chemicals in the product from absorbing into the skin and getting into the bloodstream. have i been following a line of hogwash? i am not adding all these expensive oils to my mixtures merely to nourish the surface of my skin. at the very least, i want to impact the second layer of skin.
  • What kind of oils are you talking about. Some drugs can penetrate skin to reach the blood but most oils do not. 
  • carrier oils, with a few essential oils added, and my intention is that all of them should at least get to the first deeper level of the epidermis if not to the bloodstream. as far as carrier oils, i'm talking sea buckthorn, tamanu nut, carrot seed, extra virgin coconut, grapeseed, sunflower, sweet almond, etc, along with the bee products: beeswax, propolis, bee pollen, royal jelly, and raw honey, mixed into organic shea butter. essential oils added are usually german chamomile, helichrysum, indonesian sandalwood, lavender, carrot seed.

    i use bio-identical hormone cream, it definitely gets into the bloodstream, verified this with the pharmacologist at the compounding lab, then told him what i am trying to do with the oils, absorption-wise, and asked if he the oils should be able to absorb. his answer was of course!, that it depends on the skin and depth of the layers of each individual, but there should be nothing keeping those oils from absorbing, because nothing to prevent absorption has been added (although, i had forgotten to mention the bee products, maybe the propolis that can embalm things would prevent absorption...?). he wanted to know why i was asking, and i explained to him that i had recently read that the skin is there to keep things OUT, not let things IN, and that maybe my line of reasoning hoping for absorption was hogwash. he said, that yes, the skin is supposed to keep things like bacteria out, that it does serve that purpose, but that it should let the oils IN.

    where i am coming from is that skin cancer runs in my family, and once my parents began getting cut on, it never stopped, they had to keep cutting and cutting and cutting and cutting. i know my skin has been pretty badly sun damaged, under the surface. even though this has been a shot in the dark, i have been aiming at getting absorption on the surface and at least to the second level of epidermis in an effort to undo some of the damage that has been done in the past, to prevent an issue of needing to cut ever arising. this pharmacologist said he absolutely agreed with what i was doing and saw no reason it didn't have a chance of working, said if he was in my position, he would be doing the same thing.

    somebody is spouting hogwash, either those who say absorption is not possible, or the crowd that says absorption is a given. i imagine there is some middle ground, and that absorption can and does frequently occur, except with over-the-counter products that are made with a preservative and then have added ingredients to prevent absorption in order to protect the body from receiving the harmful preservative, e.g., that lack of absorption is prevented from the outside so the preservative getting into the bloodstream will not become an issue.

    but all i am doing is surmising and shooting arrows in the dark, and have to depend on experts to tell me what the truth of this matter is, especially in the case where there is a raging controversy like this one. what i need is a minimum of a degree in chemistry, and that is not going to happen anytime soon. i have tried researching this on my own and have come to a standstill as to what to believe. i figure the worst that can happen is that it won't work and a by-product is that i have a well-nourished and lubricated skin surface.

    any perspective you can offer will be appreciated. i am sending the pharmacologist at the compounding lab samples of my mixes, and he sounded thrilled for the opportunity to receive them.

  • I've been doing some more study on this. Skin definitely does absorb some cosmetics but it depends upon the ingredients in there and the formulations in which they occur. When considering the degree of penetration and/or permeation across the skin barrier, this process depends on the active ingredient in question as well as the vehicle
    in which it is formulated and the interaction between the vehicle and the skin.



    Lipophilic substances will accumulate in the stratum corneum, hydrophilic substances are likely to stay on the skin’s surface while amphiphilic (both water- and lipid-loving) substances will cross the skin’s barrier. While intracellular
    absorption is the most direct route, a chemical passing through this route is also likely to encounter the greatest resistance to permeation as transport will be required through both lipophilic membranes and hydrophilic intracellular spaces. For that reason, cosmetics absorption is most easily achieved through the intercellular route.


    The most commonly used formulations to ensure percutaneous absorption are oil-in-water or water-in-oil emulsions. This approach allows the active ingredient to be trapped in dispersed droplets or to be dissolved in the continuous phase of the emulsion depending on its affinity for oil or water.


    Basically, oils can absorbed into the stratum corneum but are unlikely to do much in the next layers of the epidermis as those layers are generally hydrophilic. From what I've read, certain essential oil components make it further and get all the way into the bloodstream.