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The Hardgainer’s Bible: 15 Fundamental Principles to Build Muscle and Sculpt a Superhuman Physique?

The Hardgainer's Bible: 15 Fundamental Principles to Build Muscle and Sculpt a Superhuman Physique

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A total of 1 review of this product on Reddit.

>You said you never made noticeable progress. Are you still 45% bf?

The Hardgainer’s Bible

This is a pretty good resource for information.