So, you're looking for a nifty serotonin molecule pendant but don't want to spend megabucks? Well, here you are. Serotonin is the "happy" neurotransmitter - that's why the pharmaceutical companies are making billions on drugs that make more of it available to your brain - but you can be reminded of its awesomeness with this delectable design just waiting to find its way into your life. This specific design is made so it can print in stainless steel (minimum of 3mm width). Enjoy!