Oral Testofen, L-Citrulline, Resveratrol, and Caffeine Supplement Drink Improves Sexual Function in Men with Phosphodiesterase 5 Inhibitors: Randomized, Double-Blind, Placebo-Controlled Crossover Pilot Study.
Masato ShiraiYuto MiyoshiTaiki OgasaMiho MiyoshiKeisuke IshikawaIppei HiramatsuYuka UesakaTaiji NozakiTaro KoyamaAkira TsujimuraPublished in: The world journal of men's health (2020)
This is the first study to show that our supplement drink may not only be effective for erection but also for libido, orgasm, and ejaculation.