Science tattoo idea. I'd probably go with acytlcholine... You know, being a teacher and all...

endorphins chemical formula tattoo - (possibly integrated into my ravens as constellation type things)

Serotonin Molecule Tattoo, flower tattoo, happiness tattoo...

Serotonin Molecule Tattoo, flower tattoo, happiness tattoo The chemistry of happiness!

serotonin tattoo- neurotransmitter and hormone that controls mood,happiness, and anxiety

(serotonina tattoo-neurotransmissor e hormônio que controla o humor, felicidade e ansiedade) serotonin tattoo- neurotransmitter and hormone that controls mood,happiness, and anxiety

White ink molecule tattoo by Jon Boy

40+ Subtle White Ink Tattoos Your Parents Won't Even Mind

Dopamine and serotonin molecules by Courtney O'Shea Everlasting Tattoo San Francisco is you STEEN

Dopamine and serotonin molecules by Courtney O'Shea Everlasting Tattoo San Francisco is you STEEN

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