Here are some...: At 16, a 4.7-inch erect penis is normal and your physical growth - penile growth included - will continue for at least 2 to 3 years. After reaching adulthood, physical growth stops as predetermined by genetic factors. Therefore, it's practically unnecessary for you to worry about penile length. In reality, there has been no known supplement to enhance penile growth.
Answered 12/27/2014
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