What does the L stand for and where to you buy yours from? Thank in advance.
It is simply a way of telling the different forms apart, but you needn't worry much - pretty mich anything sold as 'vitamin c' is l-ascorbic acid. Be more worried about impurities that may be hyped by marketing materials - which is why I always say make sure it is *pure pharma grade*...
Below is from a post on the discussion forum at the Vitamin C Foundation site - there is lots of good info there:
http://www.vitamincfoundation.org/forum/index.php The post below is from this thread: http://tinyurl.com/2p69d7
Linus Pauling explains this in HOW TO LIVE LONGER AND FEEL BETTER -
> there are actually 4 sterioisomers of ascorbic acid (according to > Pauling)
l-ascorbic acid d-ascorbic acid ld-ascorbic acid dl-ascorbic acid but only l-ascorbic acid cures scurvy - in guinea pigs/humans, and
> thus only l-ascorbate is vitamin C. So a vitamin C product is by > definition l-ascorbic acid, sodium-l-ascorbate, etc.
What I find interesting is that all sterio-isomers, at least in
> theory, are equivalent antioxidants. So if the antioxidant property > was the significant property in vitamin C - all the forms would have > at least some value, but they apparently have very little, especially > regarding scurvy and heart disease.
Back to the question - if a product says it has vitamin C - it is
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