My answer over the past 20 years has remained constant.

There are times when supplements can be good, they can help. But, they are difficult for the FDA to monitor so you cannot be guaranteed that what you're buying is what you're getting. In fact, to cut costs, supplement companies can add ingredients, package, store, and ship products in ways that harm the integrity of the product, and you would never know. This is THE reason I "first" like to see nutrition obtained from "actual foods." Another strong argument for actual food nutrition and against supplement nutrition is that the bioavailability of nutrients in food sources compliments the way your body recognizes, takes in, utilizes, and stores (the fat soluble ones) nutrients from real food: Organic, Grass Fed, Wild Caught, Free Range, and Whole-Unprocessed.

http://www.healio.com/internal-medicine/practice-management/news/online/%7B75187363-0b4e-425c-bbe4-192e3bd43fce%7D/fda-orders-drug-dietary-supplement-maker-to-immediately-cease-operations