Dr. Joel Fuhrman has been promoting a supplement called Hydro Biotect, calling it a “potent health elixir” that supports everything from healthy aging to inflammation, mitochondria, cardiovascular function—even digestive tract healing.

He also claims the product is backed by 21 scientific studies. But it turns out there is zero independent evidence that dropping a magnesium tablet into an open glass of water produces hydrogen levels that affect human health in any meaningful way.

Yet this supplement costs about $600 a year. If you want to see the full breakdown — what the studies actually say, what they don’t say, and why claims like this are so misleading — watch the video.