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Injection Technique Route: Subcutaneous (into the fat layer beneath the skin) Syringe: Insulin syringe, 29 to 31 gauge, 0.5 mL or 1 mL Sites: Abdomen (2 inches from the navel), outer thigh, or upper arm Pinch a fold of skin at the injection site

Key finding: Dose-dependent collagen and extracellular matrix production in fibroblasts

Huberman sheds light on the profound impacts music can have on cognitive functions such as memory, learning and emotional regulation

The gene-modulation story is the fields most interesting mechanistic frontier and its least clinically validated

Discoloration: Any change from its original crystal-clear appearance, such as a yellow or brownish tinge, means the solution has been compromised