so ,many sources says that vitamin C does without doubt increase collagen production,at least in skin cell cultures.(fibroblasts) but the required amount is far greater than what you typically get through your diet.
http://www.smartskin...pical/vitc.html
http://www.mothernat...ooks/10/115.cfm
The amount of 300 to 500 milligram a day is not enough according to all doctors however.
http://users.erols.c.....gen synthesis
But many sources also state that you can't consume enough vitamin C orally to get a noticeable effect in your skin.
I wonder if they have considered megadoses of for example 20 gram a day or so.
What are your experiences with Vitamin C orally and dermally,have you noticed any pronounced effect?
Topical application of Vitamin C (L-Ascorbic Acid) of min 10% have shown great effects on both skin luminosity, increase in collagen production=reduction of surface lines.
It has been stated that you'll need min 10% concentration to have any effect at all. It is acidic so it might irritate the skin at 10% or higher concentration. But you can get used to it.
It has wound healing properties.
It is extremely unstable. After mixing Ascorbic Acid powder in a serum it should be kept in the fridge and used up within 3 weeks.
Vitamin C taken orally might not reach the skin at all. Hence topical application is more important.
It is naturally found in human Epidermis but it is depleted by UV exposure.
There are moe stable form of Vitamin C (Sodium ascorbyl phosphate, Magnesium ascorbyl phosphate etc.) but many experts say that they don't have the same positive effect on skin as L-Ascorbic-Acid.
I'll attach a brochure of Stay C-50 (sodium ascorbyl phosphate).