The global dietary supplements market was valued at $192.65 billion in 2024 and is projected to reach $327.42 billion by 2030, reflecting a compound annual growth rate of 9.1%. That is not a niche category growing quietly in the background of consumer retail — that is a mainstream, structurally expanding market redefining how American consumers think about daily health routines. And sitting squarely at the center of where supplement brands want to be in 2026 is Costco: one of