Doubtful: Xtend contains several Amino Acids which are not likely to cause headaches. Only if you never get headaches without xtend and always get it whenever you take it can you say that xtend is culprit. I do not think xtend is truly helping you health anyway. At least have a doctor recommend it for a specific reason.
Answered 6/24/2014
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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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