I don't know much about it, really. what I DO know is interesting, though. L-lysine can help reduce the severity of herpes breakouts, or even prevent breakouts. This applies to Simplex I and II (cold sores and genital). It is used by the body to create Carnitine, and is also instrumental in helping us to absorb Calcium.
Lysine and Vitamin C are necessary to produce collagen
This quote is from a commercial website, but I found it interesting:
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Low lysine levels have been found in those with depression, chronic virus, asthma, low thyroid function, kidney disease, & Parkinson's. The exact significance is unclear. Some have improved with lysine usage.<HR></BLOCKQUOTE>
It is an essential amino acid, meaning that the body can not synthesize it, so we have to get it in our diet or via supplements.
I'd not heard of that connection, TF, but I've found some commercial sites claiming that there's buzz about L-Lysine's usefulness with Alopecia. Apparently, Lysine helps us absorb calcium, transport iron, create collagen, and produce antibodies, hormones & enzymes. Thyroid.About did a piece on the hair connection back in 1999, although it doesn't mention recommended dosage:
<A HREF="http://thyroid.about.com/library/weekly/aa061099.htm" TARGET=_blank>http://thyroid.about.com/library/weekly/aa061099.htm</A>
I could only find commercial sites, but the typically recommended dosage is 200-2000 mg daily (usually 500-1000 mg, 2-3 times a day during an outbreak). Long-term use of any amino acid supplement is not recommended because it can throw the others off balance.