I read through the study, did find the mention of the 2 gram dose used in that particular study, however there was no indication as to whether this had been previously determined as an efficient dose or a minimum dose. The study itself is not even done, they don't have any results up yet, so we actually have no evidence as to whether 2 grams a day is a proven dosage in either of the two standards I stated before (efficient, minimum).
However, I did find a rat study from 2007.
69.164.208.4/files/Administration%20of%20Tauroursodeoxycholic%20Acid%20(TUDCA)%20Reduces%20Apoptosis%20Following%20Myocardial%20Infarction%20in%20Rat . pdf
They used a dose of 400mg/kg bodyweight, which is something ridiculous like 32.4 grams per day for someone weighing 180 lbs. Further exemplifying the fact that the dose used in the unpublished study is not anything to base an average dose off of. Of course, the study was also looking mostly at myocardial infarction recuperation rather than hepato-protective benefits.
Drugs.com has listed doses between 300mg/day to 15grams/day of
UDCA depending on the condition, and no suggested dose for liver protection.
drugs . com/dosage/ursodiol.html
Personally, I think I'd just fly with the recommended Aegis dose, Antaeus is a pretty stand up company and in talking with Jake you find that he is incredibly knowledgable and resourceful. I doubt they'd suggest a lower dose than you would need for the desired benefits.
The Aegis bottle says between 500-750mg/day is all that's needed for standard liv protection from orals.
Sorry that last part sounded reppy, I'm not a rep, just a fan
.