Is there hyaluronic acid in these?

No this doesn't have Hyaluronic acid. It contains 2500mg of collagen peptides.

Why is there only enough in one bottle for 15 days?

Hi, OLLY here! OLLY Collagen Rings is a delightful way to get your daily dose of collagen in a nostalgic shape and peach flavor. We put 15 servings in our signature OLLY bottle so that it will look amazing on your kitchen counter (or wherever you keep your gummies) without taking up too much space. The lower count also allows us to keep the price point more accessible for consumers who would like to try the product before committing to a month's supply.

What are Bioactive Collagen Peptides® and how are they different from other kinds of collagen?

Hello, OLLY here! OLLY Collagen Gummy Rings are formulated with 2.5 grams of Verisol Collagen peptides, which have been clinically researched to help reduce the appearance of fine lines and wrinkles and boost skin resilience. OLLY Collagen Powder is formulated with 10 grams of Collagen peptides, a slightly different material but also clinically researched to help support healthy skin, and also provide collagen as a building block for other tissues in the body, including bones and joints. If you have any further questions, please reach out to us through our company website.