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CA$24.70
per keychain
From Tryptophan To Serotonin (Chemistry Humour) Keychain
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Aluminum Circle
+CA$6.45
+CA$6.45
+CA$31.60
+CA$31.60
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From Tryptophan To Serotonin (Chemistry Humour) Keychain
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!
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4.6 out of 5 stars rating5.5K Total Reviews
5,506 Reviews
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Beautifully made, picture has excellent qualiry. I just love it! Thank you!
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By Joanne G.February 27, 2026 • Verified Purchase
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They are beautiful but the second batch the border was wider taking away from the picture.
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Product ID: 146843808343815802
Designed on 2010-01-10, 12:12 PM
Rating: G
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