... important muscle- building hormone. With that in mind, let's shift the conversation from food to hormones, and the role these chemical messengers play in the muscle- building process. MUSCLE- BUILDING ... the health of your heart, brain, muscles, and joints. The most important are omega-3 fatty acids, one of the two main types ofpolyunsatu-rated fats. They've been linked to bigger muscles, ... disease. Obviously, this book is about building bigger muscles, not longevity. But I bring this up for two reasons: First, overall health is important to all of us. Second, having the...