Well lets look at this, what does synthetic mean: chemistry made artificially by a chemical process of synthesis, especially so as to resemble a natural product. To me that says that somewhere within that process there "might" be something that I don't want.
With whole food products/vitamins you know what your getting as long as it comes from a reliable company. That is why there alittle more costly. But you also don't need as much.
We as people have become a society that over medicates with vitamins, minerals and antibiotics. This can lead to more serious issues.
Can't go wrong with Whole food products