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Sale Price $7.10.
Original Price $8.35 Comp. value
per keychain
You save 15%
Serotonin Keychain
Qty:
Style
Aluminum Circle
+$2.20
+$2.20
+$10.70
+$10.70
About Keychains
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About This Design
Serotonin Keychain
Serotonin (pronounced /ˌsɛrəˈtoʊnən/) (5-hydroxytryptamine, or 5-HT) is a monoamine neurotransmitter synthesized in serotonergic neurons in the central nervous system (CNS) and enterochromaffin cells in the gastrointestinal tract of animals including humans. Serotonin is also found in many mushrooms and plants, including fruits and vegetables.
Customer Reviews
4.6 out of 5 stars rating5.4K Total Reviews
5,405 Reviews
Reviews for similar products
5 out of 5 stars rating
By Ali Y.February 4, 2026 • Verified Purchase
Aluminum Circle, 2"
Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
5 out of 5 stars rating
By linda f.June 18, 2025 • Verified Purchase
Premium Round, Small (1.44")
So cute and this is perfect!!!
5 out of 5 stars rating
By V.August 21, 2023 • Verified Purchase
Zazzle Reviewer Program
Beyond expectations. Choice of artwork is overwhelming, I found exactly what I needed from SJW_Graphics. Detail, colors, overall design looks great on this keyring. Could use as a pendant, purse charm, bookmark, too! Metal is sturdy without being heavy. Colors beautiful, with clear margins. Customized name makes this gift extra special. So many fonts, so many colors & sizes!
Original product
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Other Info
Product ID: 146797192286076877
Created on: 2/16/2009, 11:44 AM
Rating: G
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