I'd like to know what the relationship is between Vitamin C, cortisol
and DHEA.  For example, does Vitamin C reduce cortisol?  Does DHEA
reduce cortisol?  Does Vitamin C affect DHEA in any kind of way?  I
know that ratios of DHEA to cortisol have been noted with low
DHEA/high cortisol being observed in a number of different conditions
of ill health.  But, I'm more interested in knowing about how these
three interact and affect one another, if at all...

dear jat-ga,
       Vitamin C has been shown to reduce the elevation of cortisol in
response to heavy exercise.
for the details please refer the follows:

http://www.lef.org/magazine/mag2005/dec2005_report_cortisol_02.htm

http://www.lef.org/protocols/prtcl-002a.shtml

http://www.soulhealer.com/3209-4.htm

pl reply me 
with regards
shareparthi

Reducing DHEA appears to stimulate cortisol production.
(http://www.blackwell-synergy.com/doi/abs/10.1046/j.1365-2567.1999.00628.x)

Vitamin C appears to inhibit cortisol secretion.
(http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=173480&dopt=Abstract)

According to this site: http://www.life-enthusiast.com/twilight/shealy/dhea.htm
vitamin C increases DHEA levels.

L-theanine, an amino acid naturally present in green tea, acts to combat cortisol.