SYN MASS AMINO 555 is a broad-spectrum injectable amino acid blend formulated to support muscle hypertrophy, post-exercise recovery, and connective tissue regeneration. It is built on the combined effects of essential and conditionally essential amino acids, each selected for their role in anabolic signaling, tissue repair, and metabolic recovery.

Amino acids were first isolated in the early 19th century as the building blocks of proteins, but their unique physiological roles were uncovered progressively through the 20th century. By the 1970s, researchers had identified specific amino acids—like Leucine and Glutamine—as regulators of muscle metabolism and immune resilience. Modern injectable formulations, like SYN MASS AMINO 555, are designed to deliver these nutrients directly into the bloodstream, bypassing digestive breakdown and allowing for rapid bioavailability in performance or recovery states.

The BCAAs L-Leucine, L-Isoleucine, and L-Lysine drive muscle protein synthesis and nitrogen retention. Glutamine helps maintain gut integrity and immune function during physical stress [2]. Arginine and Citrulline enhance blood flow and nutrient delivery via nitric oxide production [3]. Ornithine aids in ammonia clearance, reducing fatigue, while Glycine supports collagen synthesis and connective tissue healing [4]. Taurine contributes to cellular stability, electrolyte regulation, and antioxidant defense [5].

SYN MASS AMINO 555 is ideal for use during plateau phases, injury rehab, or high-frequency hypertrophy training where rapid recovery and anabolic efficiency are essential.