You’ve probably noticed ads for these “superfood powders” scattered across social media or on your favorite podcast.

Athletic Greens, Daily Greens, Supergreens — mix just one scoop of these multivitamin powders into a glass of water or a shake, their marketing typically says, and you can get all of the vitamins and minerals you need for the day, as well as added health benefits like a stronger immune system, less stress, better digestion and more energy.

Representatives from Athletic Greens and Huel (which makes the Daily Greens blend) said that while some scientific studies have found links between the individual ingredients in their products and certain health benefits, no rigorous, independent studies have evaluated the health benefits of the products themselves.

When manufacturers grind vegetables like broccoli or spinach down into supplements or powders, some of the vitamins and other beneficial components are lost in the process, Dr. Nestle said, including some of their fiber, which is essential for regulating digestion and keeping your gut healthy.

You’re better off getting nutrients from eating whole, unprocessed foods directly, Dr. [Gerard] Mullin said.

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