Clenbuterol is being sold by many online pharmacies worldwide but Mexico is considered the most popular source for users in the United States. In Mexico, the legal status of Clenbuterol is more linient than in the USA, but, this would also mean that the quality of the product is not controlled and cannot be assured. You may be able to purchase a good deal of Clen pills at a very low price, the chances of getting fake or counterfeit products are high on the market. In spite of this, you can also purchase Clenbuterol if you reside in the United States by ordering some from a research supply company in bulk. Because it is not a controlled substance in the USA, there is not law that prohibits the possession of Clen whether you order it from a research chemical supplier or from Mexico.