These structure molecule necklace are made from a nickel-free and lead-free zinc alloy and measure about 1 1/4 inches long (3.2 cm). They are hang from an 18 inch silver chain.
Acetylcholine is involved in learning, attention, and memory. As a crucial component of thinking and recall, it also plays an important part in dreaming.
Serotonin is the neurotransmitter of happiness. Serotonin is responsible for feelings of joy, relaxation, and well-being.