Oils of capsaicinoids and methods of making and using them are described. In some variations, the oils of capsaicinoids comprise at least 40% w/w capsaicinoid and a solvent capable of solubilizing the capsaicinoid, wherein the oil of capsaicinoid is substantially free of capsaicinoid crystals or capsaicinoid precipitates. In other variations, the oils of capsaicinoids consist essentially of at least 40% w/w capsaicinoid and a solvent capable of solubilizing the capsaicinoid. The solvent may be a semi-volatile solvent, a non-volatile solvent, or a volatile solvent, and the oil may comprise at least 50% w/w capsaicinoid, 60% w/w capsaicinoid, 70% w/w capsaicinoid, 80% w/w capsaicinoid, 90% w/w capsaicinoid, or 95% w/w capsaicinoid. The oil of capsaicinoid may also include a crystallization inhibitor.