Lean1 Vitamin is a water-soluble vitamin that must be obtained through diet by humans. Lean1 Vitamin C is a necessary component for collagen formation, one of the primary connective tissue fibers. (Connective tissue forms the fascia that gives muscle shape and strength, tendons, ligaments, bone and cartilage.) Vitamin C, is therefore, essential for tissue healing, such as from wounds, burns and injuries. Lean1 Vitamin also helps on the structural adaptations that result from exercise training such as muscle growth and strengthening of bones.