I've recently introduced bone broth as part of my paleo diet (I've noticed some people include this, some don't, but looking at the nutritional value it seems well worth including!), however it gives me really bad brain fog for a few hours after having some.

Looking into this it seems it's potentially down to excessive free glutamates, from the amino acid glutamine in the bone broth.

One of glutamine’s many roles in the body is to convert to two neurotransmitters essential for good mental health – glutamate and GABA. These play balancing but opposite effects on brain chemistry.

In particular, glutamate is stimulating and GABA is calming. In a healthy person, the two are kept in a delicate but balanced ratio.

Problems can develop when there’s excessive glutamate in the brain
When Bone Broth Is Bad For You - Fearless Eating

Some suggestions I've read are either start with meat broth, then slowly introduce bone broth, or increase GABA to balance out the increase in glutamate.

Aren't PFS guys supposed to have impaired GABA synthesis or something?

Anyone else experienced this issue with bone broth, and did you just 'push through' or slowly build up a tolerance to it or what?!