To find out, I tried a popular collagen peptides brand you might've already seen, thanks to several viral reviews on social media, and a glowing endorsement from Jennifer Aniston: Vital Proteins Unflavored Collagen Peptides ($26). For reference, each two-scoop serving of the Vital Proteins collagen peptides is just 70 calories with 20 grams of collagen peptides, 18 grams of protein, and 18 amino acids. Vital Proteins Collagen Peptides ProsFlavorless : Because this collagen peptides powder had no flavor, it was easy to mix into my foods or drinks. : Because this collagen peptides powder had no flavor, it was easy to mix into my foods or drinks. What to Note About Vital Proteins Collagen PeptidesWith over 52,000 five-star reviews, I'm not the only one who enjoyed Vital Proteins collagen peptides.