Dehydroascorbic acid (DHAA) is a form of vitamin C that is absorbed much
better than common ascorbic acid (AA). When taken orally, 5 grams of DHAA
results in peak blood plasma vitamin C levels twice as high as AA or
liposomal C. DHAA for dietary use can be made by an economical,
do-it-yourself method right at home. I have published a YouTube video that
teaches you how to make it. This is a very long video (45 minutes) that
discusses the science behind why DHAA is absorbed so much better, shows
actual blood absorption data comparing various oral forms of vitamin C, and
demonstrates in great detail the DIY method for making DHAA. People who are
interested in achieving high blood levels of vitamin C will be very
interested. I am going to post a link to this video here, but before I do,
please be informed of the following disclosure and notice:

My name is Doug Kitt, and I am a commercial vendor of vitamin C products. I
have a commercial interest in the video. The name of my company is mentioned
several times, and one of my products is briefly discussed. You will be
asked for a donation at the end of the video. Furthermore, data is presented
that some people consider critical of liposomal C. If any of these things is
likely to offend you, please don't click on the link!

http://youtu.be/YHKBhz7OCB4