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Garber JR, Cobin RH, Gharib H, Hennessey JV, Klein I, Mechanick JI et al (2012) Clinical practice guidelines for hypothyroidism in adults: cosponsored by the American Association of Clinical Endocrinologists and the American Thyroid Association

Some individuals notice improvements in energy or skin clarity within a few weeks

Even topical use (creams and serums) shows improvements in skin firmness, elasticity, and photoaging with consistent use (8-12 weeks) [2]

Research efforts are also focused on understanding how variations in experimental design, concentration, and molecular stability may affect peptide behavior across different in vitro systems and analytical frameworks