Yes: Zma is a preparation of zinc, magnesium and a b vitamin. It is marketed mainly as a strength building supplement but is also marketed as a sleep aid (they add tryptophan, which can enhance sleep).
Answered 7/8/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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