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$18.25
per keychain
From Tryptophan To Serotonin (Chemistry Humour) Key Ring
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Style
Aluminum Circle
+$1.65
+$1.65
+$39.70
+$39.70
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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 rating5.6K Total Reviews
5,567 Reviews
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5 out of 5 stars rating
By T.29 May 2025 • Verified Purchase
Metal Circle Keychain, 5.08 cm
A huge big THANK YOU to the designer Little Linda Pinda. This was a special order and it turned out so lovely. Very happy. And the delivery was super quick too.
5 out of 5 stars rating
By T.29 May 2025 • Verified Purchase
Metal Circle Keychain, 5.08 cm
A huge big THANK YOU to the designer Little Linda Pinda. This was a special order and it turned out so lovely. Very happy. And the delivery was super quick too.
5 out of 5 stars rating
By Ali Y.4 February 2026 • Verified Purchase
Metal Circle Keychain, 5.08 cm
Lovely & cute keychains i love them thank you sooo much ,they also reached to me soo fast 😍.
from zazzle.com (US)
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Product ID: 146843808343815802
Added on 10/1/10, 12:12 pm
Rating: G
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