The document discusses the supply chain constraints of different elements in producing and distributing a whey protein supplement. It notes that the key protein ingredient is sourced from a large dairy supplier in Denmark due to their high milk production. This supplier ships the protein to a manufacturing warehouse in the UK for packaging and quality testing before distribution to stores. The supply chain faces constraints around transporting goods from Denmark and across water to stores in Ireland. It concludes that while long-distance sourcing may seem uneconomical, the large supplier volumes help reduce per-unit costs.