I've never eaten berries or had juice from
American Beautyberry (Callicarpa americana) but I'd use a tea strainer to strain any bits of stems and seeds before drinking but that's just my preference because I prefer juice without pulp, etc. If tiny particles are consumed, I'd think they would pass through your system.
You can scroll down the page on the above link I posted to read comments from members regarding the Beautyberry plant and I found the following article written by one of our members about making Jelly from Beautyberry:
http://garden.org/ideas/view/g...