[Billthedrill]

It's difficult to produce. It isn't synthesized in a yeast cell, where you can ramp up production in industrial-sized vats. It's produced in a mammalian cell (CHO, or Chinese Hamster Ovary) that is much more difficult to keep active and clean in large batches. So you have to build lots of small reactors to produce the stuff.

You have to keep this stuff incredibly pure because it's used in such small amounts with such large systemic effects. That costs, too.

[Steve_Seattle]

Thanks very much; it’s amazing the knowledge base that exists here in FR.

[Bellflower]

Interesting. Can you tell us any more about it? What exactly is it? Does it occur naturally?