Best Prime Day Fitness Deals, From Bestsellers to Editor Favorites

Vital Proteins Collagen Peptides Powder, Unflavored ($38, originally $47)

If you're already a fan of the original Vital Proteins Collagen Peptides, you might want to consider trying out the advanced version. It has the added benefits of hyaluronic acid and vitamin C to help support collagen production and skin elasticity. Plus, it's approved by celebrities like Jennifer Aniston (in addition to our own PS editor). Just mix it into your tea, coffee, and smoothies for an added boost.

Editor Quote: "One of my favorite things about the collagen powder was that it added a hearty dose of protein to anything I ate or drank throughout the day (nearly 20 grams of protein per serving)." — Christina Stiehl, former senior editor, Fitness