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Research Use Only (RUO)

Meaning

Research Use Only (RUO) is a classification designation applied to reagents, instruments, or biological substances that are explicitly intended for use solely in laboratory research and are not approved for clinical diagnostic or therapeutic applications in humans. This label indicates that the product has not undergone the rigorous validation, quality control, and regulatory scrutiny required for clinical-grade materials. In the hormonal health space, using RUO compounds for direct patient treatment is a significant deviation from clinical standards and carries substantial, unquantified risks.