If you have dual citizenship do you lose any benefits from any of the two countries?

Question

I have dual citizenship from the US and Mexico do I lose any benefits from either of the countries?

Answer 1

It depends on what bilateral agreements are in place. These can be very complicated.

If you are living in Mexico, contact the consular section of the nearest US embassy or consulate. If you live in the US, here is contact info for Mexican diplomatic posts in the US:
http://www.embassyofmexico.org/eng/index.php?option=com_content&task=view&id=166&Itemid=60

Answer 2

No, you are citizens of both countries, there isn't a degree or tiers of citizenships.