In this study astaxanthin inhibits (or delays) β-cell destruction, in other words, preventing glucose overproduction, a 1mg dose of astaxanthin was used in the study. So what does tell about astaxathin that we didn't already know?, well......astaxanthin is 500x stronger than vitamin C, it inhibits DHT, protects against free radicals, inhibits DHT, promotes sperm (reminds me of a PDE5 supplement), protects against skin damage, etc.

astaxanthin may exert beneficial effects on pancreatic β-cell function in diabetes


Astaxanthin protects β-cells against glucose toxicity in diabetic db/db mice
http://www.cyanotech.com/pdfs/bioastin/batl19.p