brownstag Well I've tried two brands, Ultimate Nutrition DHEA from www.prices-power.com/dhea.htm (1 x 25mg 100 tablets and 1 x 50mg 100 tablets) which cost me £36 incl shipping, and the one that everyone says is the best (because there was a research paper done which used this particular brand, for no other reason), the McPherson Labs DHEA (1 x 25mg 60 tablets and 1 x 50mg 90 tablets) which cost me £46 incl. shipping. The Ultimate Nutrition ones took just under a week to get to me, the McPherson Labs ones just over two weeks.
I am just in the process of ordering more, and I have gone back to the Ultimate Nutrition DHEA, for a number of reasons. They're cheaper, in better quantities, the shipping speed is much faster, the customer service was much better (chap emailed me himself to say when he sent the package, and he marked the customs form as "gift" to ensure I didn't pay import duties), and I cannot tell the difference at all on my body - as in, the side effects, minimal though they are, are exactly the same with the two different brands. I'm reassured that both brands seem to be equal in quality - both micronised and both pharmaceutical grade with maximum purity levels (I checked all that out before buying).
To the best of my knowledge both brands are completely vegetarian (as I am veggie myself); the Ultimate Nutrition one does state on their website "100% Pure Synthetic, Not From Animals".
I take what seems to be the general recommended dose by US consultants, 75mg, split into 50mg in the morning and 50mg at night.
Co-enzyme Q10 - yes, I take 600mg a day, 300mg in the morning and 300 at night.
HTH! I rattle, to be honest, with the amount of supplements I take :(