If you DO decide on getting supplements, look on the bottle and call the manufacturer - it will usually say "sold and distributed by _______", so call and ask for the manufacturer.
Then, ask the manufacturer if the products are created there or if it is outsourced. Buy only from manufacturers who use a pharmaceutical grade processing facility.
I was shocked to find out that there is absolutely no oversight on supplements. There is no body to authenticate that what the label says is what is actually inside. It is scary.