China is the largest producer of vitamin C, as well as other similar products. In fact, they hold more than ninety percent of total production. Their price is very low, but so is the quality. Unfortunately, the price is what matters. That's why mot multivitamin products contain at least a few components that are made there, especially when it comes to vitamin C.
Production standards in Asian countries do not meet standards in Western countries. Analyses proved the presence of numerous toxic chemicals, dangerous drugs and other harmful stuff. Most food supplements designed to improve your health that contain these harmful ingredients are actually hazardous to your health. The importance of knowing the origin of every single compound became something everyone is concerned about.
It became more difficult to determine the origin of your product. Thanks to the fact all vitamins produced in China are considerably cheaper, it is easy to assume some of them will find a way to most multivitamin products manufactured elsewhere. Even if your product is manufactured in USA, you have no guarantee it isn't placed in a container produced in Asia. All in all, most product you will find in your pharmacy in fact contain some components that came from China.
Their products are so cheap that you have to assume most manufacturers will take the opportunity to earn more money. They will include some of these products in their formulas, mix them together and label their products as American. In the end, their customers are buying Chinese vitamins without knowing. It wouldn't be so bad, but considering the fact some of these products are dangerous to consume, it became a big problem.
Another problem is the fact that most packaging products used for packaging multivitamin preparations originate from Asian countries. Such products also don't meet usual health standards, or quality control standards common in other countries. Thus, there's concern that the product is packaged in a contaminated package.
It's no wonder people became so concerned. Some of them were taking vitamins to improve their health condition, and they were actually taking dangerous drugs and other harmful ingredients. Maybe the final product was manufactured in States, but some components might be produced elsewhere. Considering the price of different Asian products, and the portion of the market they occupy, it isn't hard to make a conclusion.
Cheap components are used in production of expensive products, and it really is something to b concerned about. Even when the product is labeled as American, you cannot be sure all components came from there. There is no guarantee for their origin, and no one is saying anything about packaging.
There are few manufacturers that are completely aware of the situation. Their products are properly labeled and they guarantee you that each component is produced in America. Their vitamins made in USA are really healthy. The problem is they have considerably higher price, and they aren't so easy to recognize. In any case, make sure to double check every single label before consuming food supplements.