Quote:
Originally Posted by Pilili
So I have gotten the message.
Vitamin D is important. Get if from the sun if you can.
|
But remember Vitamin D is made from the action of UVB on Cholesterol.
So low UVB and low cholesterol means..............low potential for making vitamin D3.
Everyone taking statins or consuming a cholesterol lowering diet will if successful be reducing their potential for vitamin D production. In the same way the amount of cholesterol in your skin declines as you age so those using cholesterol lowering strategies effectively are inducing premature ageing of their skin. If you are or have been cholesterol lowering it would be unwise to rely only on sun exposure for vitamin D3 production.
Low cholesterol = low vitamin D production
Similarly with UVB. What matters is NOT the amount coming from sunlight but the amount that reaches ground level where you are laying.
This paper explains how those older urban female gardeners in Belgium made less vitamin D while gardening despite the fact they received more UV radiation (refected from hard surfaces) when compared with female gardeners of the same age living at the same latitude but in rural locations (where UV is absorbed by vegetation)
When local atmospheric pollution is such that ozone is blocked then you cannot rely on laying in sunlight to make vitamin D3.
You MUST get
tested regularly or you cannot be certain that the regime you have adopted is working effectively in your body.
You may be short of UVB or you may be short of Cholesterol.
Quote:
I am pale as a vampire, and when I was younger, I used to burn very quickly. The last years I have enjoyed the sun from behind a closed window and often even from behind curtains.
|
UVB does not pass through glass therefore any time spent in UV radiation behind glass and/or curtains is counterproductive.
UVA does pass through glass and this damages your skin and converts vitamin D3 near the surface of the skin into suprasterols the human body doesn't use.
As the 25(OH)D circulating in your blood will pass near the surface of your skin it is inevitably degraded by UVA exposure.
Spending time outdoors with cholesterol replete skin and UVB replete sunlight (as close to midday as possible but whenever your shadow is shorter than your height) should create ample vitamin D3 however if you then spend time laying under glass or in otherwise UVB depleted sunlight or apply a sunscreen that converts UVB into UVA that time will be degrading Vitamin D3 remaining or circulating near skin surface.
Quote:
So finally the question is.... after I have exposed my poor body to the sun and have tried to tank the precious Vitamin D, what would be a good thing to do?
|
Get dressed, cover the skin you have exposed to sunlight. Do not let any newly made vitamin D to get degraded or washed off your skin by showering, swimming, rubbing down or in strong UVA rich light (behind glass)
Quote:
Normally after sunbathing you use an After Sun creme. Logically I will buy one, but I was wondering if there are any specific ingredients in certain After Sun cremes that will help my skin recover well and that will help it in adjusting to the UVA and UVB that it hasn't seen in a very long time.
|
Most after sun cremes are absorbed by the body. It's only the sunblocks that remain visible on the skin surface that don't. A couple of hours after application they can be measured in urine.
If the ingredients of your creme are not edible then do not consume them either orally or transdermally.
There are plenty of ways to improve the natural sunscreen potential sun of skin. Raising Vitamin D status by effective strength D3 supplements BEFORE going in sunlight is probably the most effective. 1000iu/daily/D3 for each 25lbs you weigh.
Improving omega 3 ratio to below 5 omega 6 to 1 omega 3 That means taking an effective amount of omega 3 fish oil(2g EPA+DHA daily) while also eliminating all sources of industrially made seed oils (corn, soy, sunflower, safflower) and all the foods that contain them.
Improve anti oxidant status Vitamin E vitamin c lycopene etc.
Drink green tea as you main beverage, If you can't acquire a taste for it then apply
green tea it directly to you skin.
It takes time to prepare your skin for sun exposure.
Ideally you will use UVB rich tanning tubes to keep skin hardened over winter.
changing omega 3 ratio in skin is a long term project. You can change blood levels in a matter of days but for each cell in your body to acquire the ideal omega 3 ratio is a long job allow 5 yrs for maximum effect but 2 yrs from now should see 50% of cells with reasonable omega 3 status.
Again with the antioxidant strategies allow 12 weeks before expecting measurable improvements in sun sensitivity.