Another widespread assumption is that all collagen products are interchangeable. In reality, there are meaningful differences worth paying attention to, even without getting technical.
Collagen can come from different animal sources, most commonly bovine or marine. The sourcing, processing methods and ingredient simplicity can vary widely between products. Some are single-ingredient and unflavoured, designed to blend easily into food or drink. Others include flavourings, sweeteners or additional ingredients that change how they fit into a routine.
Recent research interest in collagen often focuses on structure, digestion and how proteins are broken down in the body, rather than on dramatic end results. This makes ingredient transparency and quality particularly relevant when choosing a product, as opposed to relying on headline claims.