A stroll down the supplement aisle is a walk filled with hope. One pill offers stronger hair and nails. Another promises better memory (which will help when you have to remember to take all these pills). And if you added just one more, you might be able to finally recapture the energy of your teenage years.

But how true are these claims? Currently, the Food and Drug Administration does not approve the contents or the labeling dietary supplements before they hit the shelves.

Around 75 percent of Americans take a supplement, including Health Secretary Robert F. Kennedy Jr. He once said he took so many vitamins he couldn’t remember them all. But RFK Jr., who champions supplements and other alternative medicines, is now pushing the FDA for stronger regulations.

What could that mean for the supplement industry? And why are so many Americans turning to health alternatives today?

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