Simpson claims that the only way to ensure patients have his blend of oil is for patients to produce it themselves. Simpson’s site has instructions and an FAQ. In addition to solvent, which is highly flammable, the recipe for RSO includes a number of random household items, including small containers, coffee filters, an electric rice cooker, a large fan, a stainless steel measuring cup, as well as a coffee warmer or oven. The recipe available on his website demonstrates how to produce the full 60 grams of RSO oil for a 90-day treatment period.