27 Apr 2018
Author
Louise
Title

Vitamin-D synthesis, production in the skin discussion

Body

Lifting Vit D production question that I asked which was imbedded in another thread for ease of reference.  Original content added in first comment here in this forum topic for reference.  Louise

Comments

Previously Submitted in another topic thread and moved here for response.

by Louise on Fri, 2009-03-06 08:30.

Red, now that I have your ear (reading eyes),   I have been thinking about an opinion that I had (have?) heard in the past, that even if you do get Vit D synthesis from expsore of your skin to the sun, that this happens on the surface of the skin and in combination with natural skin fats and/or oils that it is made. 

The thinking that I was familiar with from the distant past, was that unless you avoided showering for a length of time after the exposure (guessing 12 - 24 hours) it would be washed off and of little benefit because little would be absorbed if washed off.  

I am not so curious to do the searching about the validity of this concept for myself, as in my locality natural skin exposure for more than 3 months of the year (exposed skin beyond hands and face) is not a possible option (yes there are sun lamps but Vit D3 supplementation is less expensive) but I think that you may have come upon this perspective in you wonderful quest for VitD3 info.  Just thought that you may have a ready response for me. 

Did I make that question clear or more confusing???  Thanks,  Louise

 

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Red's response from previously posted forum topic;

Originally Submitted by Red on Sat, 2009-03-07 15:47.

Hi Louise,

Sorry for the late response.  Your question was interesting to me, and I wasn't certain of the answer so I did some googling.    

It appears that while Vit D is produced by a photochemical reaction in our epidermis (the outer layers of our skin), most of the Vit D is produced in the deeper layers of the epidermis and would then not be all that likely to be washed off I'm thinking.   Good news for the more than once-a-week shower set!Image removed.

If you google "7-dehydrocholesterol vitamin di skin stratum spinosum and stratum basale" you can find a lot of additional info, but good old Wikipedia has some good, easy to read detail:

"Production in the skin

The skin consists of two primary layers: the inner layer called the dermis, composed largely of connective tissue, and the outer, thinner epidermis. The epidermis consists of five strata; from outer to inner they are: the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale.

Vitamin D3 is produced photochemically in the skin from 7-dehydrocholesterol. The highest concentrations of 7-dehydrocholesterol are found in the epidermal layer of skin, specifically in the stratum basale and stratum spinosum.[11] The production of pre-vitamin D3 is therefore greatest in these two layers, whereas production in the other layers is less."

Read more on the Wikipedia site here:

http://en.wikipedia.org/wiki/Vitamin_D

And here:

http://en.wikipedia.org/wiki/7-dehydrocholesterol

Interesting question.   Thanks for givin' me something to google over a couple cups of coffee this Saturday morning!

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  • CAP:  01/06 - 07/07
  • High-Dose Vit D3, NAC & FIR Sauna Only:  07/07 - 11/08
  • Intermittent CAP, High-Dose Vit D3:  11/08 - Present
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Thanks Red, for being willing to do that seek and find the answer.  I really suspected that it was incorrect thinking.  Don't know how I came by that revelation in the past but what it did do on a postive note for me, was it had me supplementing my diet beyond the One-A-Day multiple vitamin support of my childhood days.  

My active supplementation efforts go way back to the writings of Adele Davis, nutritionist.  I began her suggested nutritional modifications to support health, healing, and child and adult nutritional supplementation and dietary support for well being back in 1973 during my first pregnancy.  Since that time, I have been supplementing with added Vitamin D in an individual capsule of Vit A & D.  I am going to get into the boxes of books and find those antiquated? books of Adele's so that I can be sure of what her recommendations were back then.  I know I followed them because they, like much of the information here made good sense to me at the time. 

I started to supplement back in 1973 with Magnesium for foot cramps during pregancy and have rarely gone long without it in all these 35 years, because it prevents the return of the foot cramps.  The Obstetrician recommended Maalox which is mostly magnesium so I began my fascination with nutrition at that time because I was impressed and began to believe that what you eat has alot to do with your physical state.   Not so unlike your personal connections to the Vitamin D and people in your life I would think.

Thanks so much for following up with references and comments to my question I hope it has added to the understanding of other users and viewers.      Louise  

  • CAP(TiniOnly): 06/07-02/09 for CFS
  • MethylationProtocolSupplements: Started08/08
  • Intermtnt CAP: 02/09-02/10
  • Full MethylProtocol & LDN 02/09
  • Off CAP: 02/10, cont LDN & MethlyProtocol support