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A member asked:
Can tyrosine in protein shakes make your penis or balls smaller?
A doctor has provided 1 answer
The Amino Acid: Tyrosine, an ingredient in protein supplement shakes, is created in the body by its own essential Amino Acid phenylalanine. It is one of the body's protein blocks (including dopamine) but should not effect smooth muscle or reproductive gland size one way or the other.
Answered 6/24/2014
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