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Its copper also supports lysyl oxidase, the enzyme that cross-links new collagen fibers and gives the matrix strength (gene regulation, tissue clearing, and collagen cross-linking)

Each category works through a different mechanism, carries a different level of clinical evidence, and comes with its own cost and safety considerations, so understanding the distinction matters before choosing one

L-Carnitine Injection (IM) What It Does: L-carnitine plays a key role in energy production by helping the body convert fat into energy