Segmentation by types of antioxidant capacity assays distinguishes methodological approaches that dictate instrument investment, assay throughput, and data fidelity. Spectrophotometric assays—chiefly DPPH, ABTS, and FRAP—remain the most widely deployed, offering cost‑effective, bulk‑sample analysis; they dominate the market share due to their simplicity and compatibility with standard plate readers. Electrochemical assays, including cyclic voltammetry and amperometric sensors, provide real‑time redox potential measurements, appealing to pharmaceutical and research labs seeking mechanistic insight. Fluorometric assays, such as ORAC, deliver heightened sensitivity for low‑concentration antioxidants, supporting cosmetics and nutraceutical development. Chemiluminescent platforms, though less prevalent, enable ultra‑low detection limits useful in clinical diagnostics. HPLC‑coupled antioxidant detection integrates separation power with quantification, catering to complex matrices in food safety and drug stability testing. Each type contributes uniquely to the market, with adoption rates reflecting cost, analytical precision, and regulatory acceptance across the identified application segments.