The Muscle Builder Duo bundle allows you to mix and match our best-selling muscle building supplements to create your very own perfect duo. You can either choose the same product twice or opt for two different products. The choice is yours! Here’s a brief summary of the 6 products available to choose from in this bundle; German Pharma - Beta Ecdysterone Beta Ecdysterone is a class of compounds called Ecdysteroids, this is the hormone that helps plants grow. This extract has been shown to increase lean muscle mass, increase cardiac ability and lower fat mass in humans. German Pharma - Turkesterone There is no surprise that Turkesterone is our best seller. The effects of this plant derivative on humans are very comparable to testosterone. Research suggests Turkesterone accelerates muscle growth via various pathways and is becoming recognised as the most effective natural muscle building supplement. German Pharma – Epicatechin Epicatechin reduces myostatin activity which relieves the cap on muscle growth potential. Additionally, Epicatechin may reduce cortisol, which will positively impact performance, fat burning and muscle development. Epicatechin is ideal for anyone aiming to increase their muscle size. German Pharma - Growth Factor The two non-steroidal natural plant extracts utilised in Growth Factor are supported by research to accelerate growth when used in combination. Growth Factor is recommended for any individual wanting to optimise muscle development and joint health, without the side effects usually associated with this type of compound. Are you still unsure what ones to choose? We have blog articles available on Beta Ecdysterone, Turkesterone, Tren-X, Epicatechin and Growth Factor.