Zen Principle Grass-Fed Collagen Peptides 3 lb. Custom Anti-Aging Hydrolyzed Protein Powder for Healthy Hair, Skin, Joints & Nails. Paleo and Keto Friendly, GMO and Gluten Free, Pasture-Raised Bovine. ( BB: 05/31/2028) is up for auction in Health & Household. The current bid is $17.00, 65% below the $48.95 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.