Bad experiment for me. A recent try. I found out that beef collagen and bone broth can up glutamate. And boy did it set my autonomic sympathetic system in overdrive. Also may explain why I do so much better with little to no animal proteins. Also with my autoimmune system dysfunction, my doc thinks animal proteins are a trigger for attack.
I have a brand new one. 2 times and it's out. If you are looking for a pure one, Supreme Nutrition guy on ebay jankdc has some good choices.
I got Zint which was more cost effective, grass fed beef, no bad stuff. I will stay that some foods alter the taste in my mouth, and this left a pretty bad taste all day. I'm going to try it again later in the day when I only have to tolerate it for a few hours.
I also had a pounding headache and nausea all day but that could have been from something else I tried that day so I have to do them separately to see.