RCT (Randomized Controlled Trial)
Also known as: RCT · randomized controlled trial
A clinical trial design in which participants are randomly assigned to intervention or control groups, considered the gold-standard for causal inference.
Random assignment removes most forms of selection bias; control groups isolate the intervention's effect from natural history, placebo response, and regression to the mean. Double-blinded RCTs (neither participants nor researchers know assignment) are the highest-tier evidence available. Most landmark peptide findings that 'changed the field' came from well-powered RCTs — Semaglutide's STEP trials, Tirzepatide's SURMOUNT trials, Tesamorelin's HDL lipodystrophy studies.
Absence of RCT evidence is not disqualifying; it's context. A compound with strong mechanistic evidence, positive preclinical data, and emerging practitioner reports but no RCT is a different risk profile than a compound with an RCT and opposite results.
Related Terms
Clinical Trial
A prospective research study testing a compound in human subjects under controlled protocol, typically organized into Phase 1 through Phase 4.
Preclinical Study
Research conducted in cell cultures (in vitro) or animal models (in vivo) prior to any human testing.
Three-Lane Evidence System
DoseCraft's framework categorizing every compound across three independent evidence dimensions: Clinical, Expert, and Experimental.
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