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How Does Formula 41 Work? These key ingredients inside Formula41, when combined with other proprietary ingredients, create a Super Formula that no other male enhancement product uses. Formula41 Extreme contains the most intense, powerful, penis-growth-stimulating ingredients on Earth. Each was deliberately hand-selected after countless hours of research and testing for maximum penis expansion. We focused on each ingredient individually, reducing it to it’s purest and most condensed form so we could pack as much insane boost as possible in each tiny, easy to swallow capsule.