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$30.30
per keychain
From Tryptophan To Serotonin (Chemistry Humour) Key Ring
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Aluminum Circle
+$7.90
+$7.90
+$38.80
+$38.80
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From Tryptophan To Serotonin (Chemistry Humour) Key Ring
No need to be a chemistry major or milk drinker to enjoy wry educational humour with any of these chemical molecule gifts featuring how tryptophan becomes serotonin. Make others do a double-take when you showcase "From Tryptophan To Serotonin - No Wonder Why Drinking Milk Has Such A Calming Effect". Scientific attitude gifts to calm down your chemical side!
Customer Reviews
4.6 out of 5 stars rating5.4K Total Reviews
5,428 Reviews
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5 out of 5 stars rating
By Ali Y.4 February 2026 • Verified Purchase
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Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
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5 out of 5 stars rating
By V.21 August 2023 • Verified Purchase
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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!
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By linda f.18 June 2025 • Verified Purchase
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So cute and this is perfect!!!
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Product ID: 146843808343815802
Posted on 10/01/2010, 12:12 PM
Rating: G
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