A user discussed utilizing an ECA stack (Ephedrine, Caffeine, Aspirin) via Bronkaid for general weight loss, or a YCA stack (Yohimbine, Caffeine, Aspirin) for more stubborn fat. Another contributor suggested running the ECA stack for the first 4-6 weeks of a cut and transitioning to Yohimbine HCL for the final 4-6 weeks to maximize results.