Lee suffers from insomnia. an undersupply of which neurotransmitter can cause this condition?

The appropriate response is GABA. It is an amino which goes about as a neurotransmitter in the focal sensory system. It represses nerve transmission in the mind, quieting anxious movement. As a supplement, it is sold and advanced for these neurotransmitter impacts as a characteristic sedative.

Yes it is as most fossils do have organic matter which is what is tested with radiocarbon dating